JP2005126955A - Anti-seismic strengthening structure and seismic strengthening method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-seismic strengthening structure which reduces costs by structural simplicity and which dispenses with great skill by virtue of simplicity of construction, and also to provide an anti-seismic strengthening method. <P>SOLUTION: In the anti-seismic strengthening structure, a visco-elastic body is provided on one side surface of a concrete structure 1 or both side surfaces 2a thereof; a face material 4 is provided on an outer surface of the visco-elastic body 3; and one side part of the facing material 4 is fixed to a part except the side surface 2a of the concrete structure 1 via a fixing bracket 5. An anti-fall member for preventing the face material 4 from falling is arranged in such a manner as to face an outer surface of the face material 4, and mounted on the concrete structure 1. The visco-elastic body 3 side of an anti-seismic strengthening face plate 11 with the visco-elastic body, wherein the visco-elastic body 3 is fixedly preattached to one side surface of the face material 4 or both side surfaces thereof, is provided on the side surface 2a of the concrete structure 1. After that, the face material 4 is fixed to a part, except the side surface 2a, of the concrete structure 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a seismic reinforcing structure and a seismic reinforcing method for concrete structures in the field of civil engineering and architecture, in particular, reinforced concrete structures.

  Conventionally, as a seismic reinforcement structure of a structure, when a steel frame is assembled in a column / beam frame and an earthquake-resistant brace is arranged and reinforced (for example, see Patent Document 1), or a carbon fiber sheet is used as a column, beam, wall. A seismic reinforcement structure is known in which the material is rubbed to prevent breakage (see, for example, Patent Document 2).

  Also known is a hanging plate arranged with a slight gap with respect to the wall, and a seismic wall that encloses a viscous or viscoelastic body between the hanging plate and one side of the wall. (For example, refer to Patent Document 3).

Also, an inner flat plate fixed to the column or ceiling surface or upper beam member, an outer flat plate fixed to the column or floor lower beam member, and a rubber body interposed and fixed therebetween are provided. A seismic reinforcement structure is also known (see, for example, Patent Document 4).
JP 2002-70329 A JP-A-9-96113 JP-A-1-102183 JP 2000-129933 A

  In the case of the conventional seismic reinforcement structure, there is a problem that the structure is complicated and the construction cost becomes high and the construction becomes complicated.

  The present invention is intended to solve the problems of the conventional seismic reinforcement structure, and even when fixing the face material, if it is not fixed, the structure is further simplified and the construction cost is reduced and the installation is simple. An object is to provide a seismic reinforcement structure and a seismic reinforcement method that do not require a high degree of skill.

  In order to advantageously solve the above-described conventional problems, the following configuration is provided.

  In the seismic reinforcement structure of the first invention, a viscoelastic body is provided on one or both sides of the concrete structure, and a face material is provided on the outer surface of the viscoelastic body, and one side portion of the face material is provided. Is fixed to a portion of the concrete structure other than the side surface via a fixing bracket.

  In the seismic reinforcement structure of the second invention, a viscoelastic body is provided on one or both sides of the concrete structure, and a face material is provided on the outer surface of the viscoelastic body. It is not fixed to a concrete structure.

  Furthermore, in the third aspect of the invention, in the earthquake-proof reinforcement structure of the first aspect, the fixing bracket is a steel fixing bracket having a substantially L-shaped or substantially T-shaped cross section, and one end side of the fixing bracket is attached to the face material by a bolt and a nut. The other end of the steel fixture is fixed to a concrete structure.

  Moreover, in the 4th invention, in the earthquake-proof reinforcement structure in any one of the 1st invention-the 3rd invention, the face materials adjacent at intervals are connected by the connection member, It is characterized by the above-mentioned.

  According to a fifth aspect, in the earthquake-proof reinforcement structure according to any one of the first to fourth aspects, a reinforcing member is fixed and reinforced to the outer surface of the face material.

  Further, in the sixth invention, in the earthquake-proof reinforcement structure according to any one of the first to fifth inventions, the fall prevention member for preventing the fall of the face material is disposed so as to face the outer surface of the face material, It is attached to a concrete structure.

  In the seismic reinforcement structure according to the seventh aspect of the present invention, in the seismic reinforcement structure according to any one of the first to sixth aspects, a viscoelastic body is provided on one side surface or both side surfaces of the concrete structure, and the viscoelastic body A face material is provided on the outer surface, and the face material is further held by a fastening bolt that penetrates the concrete structure, the viscoelastic body, and the face material.

  In the eighth invention, in the earthquake-proof reinforcement structure according to any one of the first to seventh inventions, the face material is a flat face material, a film-like face material, a sheet-like face material, or the like. It is a face material.

  In the ninth invention, the seismic reinforcement structure according to any one of the first to eighth inventions is characterized in that the face material is regularly provided with a large number of holes or recesses at intervals. And

  Further, in the tenth invention, in the seismic reinforcement structure according to any one of the first to ninth inventions, the calculation of the additional attenuation by the seismic reinforcement of the concrete structure is performed by the energy absorption effect by the crack of the concrete and the viscoelastic body. It is characterized by being able to calculate in consideration of both energy absorption effects.

  The seismic reinforcement method according to the eleventh aspect of the invention is characterized in that a viscoelastic body is provided on one or both sides of a concrete structure, and then a face material is provided on the outer surface of the viscoelastic body.

  In the seismic reinforcement method according to the twelfth aspect of the invention, after the viscoelastic body is provided on one or both sides of the concrete structure, the face material is not fixed to the concrete structure, and the outer surface of the viscoelastic body is not fixed. The face material is provided.

  In the seismic reinforcement method according to the thirteenth aspect of the invention, after providing the viscoelastic body on the side surface of the concrete structure, a face material is provided on the outer surface of the viscoelastic body, and the face material other than the side surface of the concrete structure is provided. It fixes to a part via a fixing metal fitting.

  In the seismic reinforcement method according to the fourteenth aspect of the present invention, after the viscoelastic body side of the viscoelastic body-attached seismic reinforcement surface material having a viscoelastic body fixed in advance on one side of the face material is provided on the side surface of the concrete structure, the surface material Is fixed to a portion of the concrete structure other than the side wall surface through a fixing bracket.

  In the seismic reinforcement method according to the fifteenth aspect of the present invention, after the viscoelastic body side of the viscoelastic body with a viscoelastic body in which the viscoelastic body is fixed to one side of the face material is provided on one side surface or both side surfaces of the concrete structure. The face material is not fixed to the concrete structure.

  According to the first invention, the viscoelastic body is provided on the side surface of the concrete structure, and the face material is provided on the outer surface of the viscoelastic body, and one side portion of the face material is other than the side surface in the concrete structure. If the reinforced concrete structure is deformed by receiving an earthquake load, it is possible to absorb energy by deforming the viscoelastic body between the face material and the concrete surface. As a result, damping performance can be added to the concrete structure. In particular, since the seismic reinforcement structure of the present invention is simple in construction and easy to construct, there is an effect that a seismic reinforcement structure and a seismic reinforcement method for a low-cost concrete structure can be obtained.

  Further, as in the first invention, when one side portion of the face material is only fixed to a portion other than the side surface provided with the viscoelastic body in the concrete structure, the one side portion of the face material is fixed. Since it is a structure, it is easy to fix a face material such as a flat plate.

  According to the first invention, since the face material is fixed to the concrete structure through the fixing bracket, the fixing member can be used to easily fix the surface material to the concrete structure. The position of the face material can be adjusted by the metal fitting.

  According to the second invention, the viscoelastic body is provided on one or both sides of the concrete structure, and the face material is provided on the outer surface of the viscoelastic body, and the face material is fixed to the concrete structure. Therefore, the structure is extremely simple as a seismic reinforcement structure, and it is easy to construct and can be constructed at low cost. Further, when the viscoelastic body tries to follow the deformation of the concrete, it can resist in a self-balancing state by the expansion / contraction rigidity of the face material itself or the expansion / contraction rigidity and bending rigidity of the face material itself.

  Further, according to the second invention, since there is no strong fixing portion for fixing the face material and the concrete structure, the structure is simpler than that when the face material is firmly fixed to the concrete structure, and the face material fixing portion. Since there is no stress concentration on the concrete structure side or the face material side, there is no damage on these parts, and the face material is not fixed to the concrete structure, so The rigidity is not constrained to the concrete structure side, and the performance by the expansion / contraction rigidity and bending rigidity resistance of the face material itself can be sufficiently exhibited.

  According to the third invention, the fixing bracket is a steel fixing bracket having a substantially L-shaped or substantially T-shaped cross section, and one end of the fixing bracket is attached to the face material by a bolt and a nut, and the other end of the steel fixing bracket is provided. Since the side is fixed to the concrete structure, it is possible to fix the face material to the concrete structure using an inexpensive fixing bracket having a simple shape. Further, the face material and the fixing bracket can be easily mounted using bolts and nuts, and the fixing bracket can be easily fixed to the concrete structure.

  According to the fourth aspect of the present invention, the adjacent face members with a gap are connected to each other by the connecting member, so that the blocked face members can be connected by the connecting member to behave integrally.

  Further, according to the fifth invention, since the reinforcing member is fixed and reinforced on the outer surface of the face material, when the strength and rigidity of the face material are insufficient, the strength and rigidity can be easily increased. Even with a face material having a large area, the strength and rigidity can be easily increased.

  Further, according to the sixth invention, since the fall prevention member for preventing the fall of the face material is provided, the face material is peeled from the viscoelastic body at the time of an earthquake, and the face material is separated from the viscoelastic body in the out-of-plane direction. A fall can be prevented.

  According to the seventh invention, a viscoelastic body is provided on one or both sides of the concrete structure, and a face material is provided on the outer surface of the viscoelastic body, and the concrete structure, the viscoelastic body, and Since the face material is held by the fastening bolt that penetrates the face material, the fastening bolt can prevent peeling between the viscoelastic body and the face material or the concrete structure, and can always maintain a stable pasting state. A stable damping force can be exhibited at all times. Further, the face material can be prevented from falling.

  In addition, when the face material is a flat face material as in the eighth aspect of the invention, it is possible to use the face material that can bear both the expansion and contraction rigidity and the bending rigidity, and the earthquake resistance that can bear the tensile force and the compression force. A reinforcing structure can be used. Further, if the face material is a flexible face material such as a film-like face material or a sheet-like face material, it can be a relatively inexpensive and light face material that does not bear a compressive force, and can be compressed. Seismic reinforcement structure that does not bear force can be achieved.

  Further, as in the ninth invention, when a large number of holes or recesses are regularly provided in the face material at intervals, it is possible to enhance the design aesthetics and to provide an excellent seismic reinforcement structure in design. it can.

  In addition, according to the tenth invention, it is possible to calculate the additional attenuation due to the seismic reinforcement of the concrete structure in consideration of both the energy absorption effect due to cracks in the concrete and the energy absorption effect due to the viscoelastic body. An economical and rational seismic reinforcement structure that can utilize both energy absorption effects can be obtained.

  According to the eleventh invention, after the viscoelastic body is provided on one or both sides of the concrete structure, the face material is only provided on the outer surface of the viscoelastic body. Alternatively, seismic reinforcement of new concrete structures can be performed.

  According to the twelfth invention, after the viscoelastic body is provided on one or both sides of the concrete structure, the face material is provided on the outer surface of the viscoelastic body without fixing the face material to the concrete structure. It is easy to construct a seismic reinforcement structure that is extremely simple and inexpensive. The constructed seismic reinforcement structure has the same effect as the second invention.

  According to the thirteenth invention, after the viscoelastic body is provided on the side surface of the concrete structure, a face material is provided on the outer surface of the viscoelastic body, and the fixing member is attached to the portion other than the side surface of the concrete structure. Therefore, the existing concrete structure or the newly installed concrete structure can be seismically strengthened by a simple method using a fixing bracket.

  According to the fourteenth aspect of the present invention, after the viscoelastic body side of the viscoelastic body-attached seismic reinforcing face material in which the viscoelastic body is fixed to one side of the face material is provided on the side surface of the concrete structure, the face material is applied to the concrete structure. Since it is fixed to the portion other than the side surface via the fixing bracket, after simply providing the seismic reinforcing surface material with viscoelastic body on the side surface of the concrete structure, the surface material is simply fixed to the concrete structure via the fixing bracket. Therefore, the construction method is simpler and easier than the thirteenth invention, and the construction period and construction cost can be reduced.

  According to the fifteenth invention, since the seismic reinforcing face material with viscoelastic body is used, the construction method is simpler and easier than the seismic reinforcing method of the twelfth invention, and the construction period and cost can be reduced.

Next, the present invention will be described in detail based on the illustrated embodiment.
FIG. 1 is a front view showing an embodiment of the seismic reinforcement structure of the present invention, and FIGS. 2 (a) and 2 (b) are cross-sectional views taken along the line AA of FIG. One side surface or both side surfaces 2a such as the wall surface of the wall 2 in the reinforced concrete structure 1 is adjusted, and a surface material made of a flat plate such as a rectangular steel surface plate or a rectangular flexible surface material on the side surface 2a in advance. The viscoelastic body 3 in the seismic reinforcing face member 11 with viscoelastic body provided with the viscoelastic body 3 formed by applying or bonding a viscoelastic material in a planar shape on one side (inner side surface) of It is provided with the face material 4 by the adhesive force of.

  When the seismic reinforcing face member 11 with a viscoelastic body is configured, it may be configured as described above, and the viscoelastic body 3 is provided on the side surface 2a by applying or bonding a viscoelastic material, or a sheet-like viscoelasticity. A body 3 is provided by pasting or the like, and a face material 4 made of a steel face plate of a rectangular shape or the like is pasted on the outer surface of these viscoelastic bodies 3 by using the adhesive force of the viscoelastic body 3 itself. It may be configured. Further, in forming the viscoelastic body 3, since there is a liquid or solid state at the time of molding, it can be applied or pasted, and between the side surface 2a and the face material 4 or the like. It is also possible to form the viscoelastic body 3 by injecting and filling it with the viscoelastic body 3 (the same applies to the following embodiments).

  If the face material 4 is a flat plate member such as wood, laminated wood, steel plate, concrete flat plate, it is possible to make the face material strong in both expansion and contraction rigidity and bending rigidity. When the face material 4 is a flexible face material that can be bent such as a film-like face material such as a synthetic resin thin film or a sheet-like face material such as a fibrous sheet or an aluminum sheet, It can function as a resisting face material and the face material itself is not damaged even if a compressive force acts on the face material. Furthermore, a composite face material in which a flexible face material is integrated with a flat face material by an adhesive or the like can also be used. In addition, about the material of the viscoelastic body 3, the plate | board thickness of the face material 4, and reinforcement, it is the same as that of embodiment mentioned later.

  The seismic reinforcement structure of the present invention may be applied to one side of the concrete structure 1 such as the wall 2 as shown in FIG. 2 (a), and as shown in FIG. 2 (b), the concrete structure. It is good also as an earthquake-proof reinforcement structure which provided the viscoelastic body 3 and the face material 4 on both sides | surfaces, such as 1 wall 2, etc. by sticking etc., and raised the damping force.

  In the case of the above-described embodiment, as shown in FIG. 4, the face material 4 provided on the viscoelastic body 3 may be placed on the beam 13 or the floor slab 14 of the concrete structure 1. The positioning of the material 4 is easy.

  FIG. 5 is a diagram showing the behavior of the concrete structure having the seismic reinforcement structure according to the first embodiment of the present invention at the time of an earthquake, and reference numeral 51 indicates that the concrete structure 1 and the viscoelastic body 3 are bonded to each other. The reference numeral 52 is an adhesive line in the side vertical direction where the face material 4 and the viscoelastic body 3 are bonded, and the viscoelastic body 3 is subjected to shear deformation to generate energy. Can be absorbed.

  Even if the face material 4 is not fixed to the concrete structure 1 as in the above-described embodiment, the face material itself has stretching rigidity or bending rigidity, and the viscoelastic body 3 follows the deformation of the concrete structure 1. In this case, it is possible to resist by the rigidity of the face material itself (self-balanced state) and to exert a damping force. In such a configuration, since there is no strong fixing portion for fixing the face material and the concrete structure, the structure is simpler than when the face material is firmly fixed to the concrete structure. Since stress is not concentrated on the concrete structure side or face material side, there is no damage at these parts, and the face material is not fixed to the concrete structure. However, it is not constrained to the concrete structure side, and the performance by the expansion / contraction rigidity and bending rigidity resistance of the face material itself can be sufficiently exhibited.

  FIG. 6 is a front view showing a second embodiment of the seismic reinforcement structure of the present invention, and FIG. 7 is a sectional view taken along the line BB of FIG. 6 and shows a wall 2 in an existing or new reinforced concrete structure 1. A side surface 2a such as a wall surface of the base plate is adjusted, and a viscoelastic material is formed or applied in advance on one side (inside surface) of a face material 4 such as a rectangular steel face plate on the side surface 2a. The viscoelastic body 3 in the viscoelastic body-attached seismic reinforcing face material 11 provided with the viscoelastic body 3 is provided by pasting together with the face material 4 by its own adhesive force.

  When the seismic reinforcing face member 11 with a viscoelastic body is configured, it may be configured as described above, and the viscoelastic body 3 is provided on the side surface 2a by applying or bonding a viscoelastic material, or a sheet-like viscoelasticity. A body 3 is affixed, and a face material 4 made of a steel face plate such as a rectangular shape is affixed to the outer surface of these viscoelastic bodies 3 by utilizing the adhesive force of the viscoelastic body 3 itself. Also good. Moreover, the one side edge part in the face material 4 is made into the earthquake-proof reinforcement structure fixed to parts other than the said side surface 2a of the concrete structure 1. FIG.

  As means for fixing the one side edge of the face material 4 to the concrete structure 1, in the above-described embodiment, a gap is provided in the lateral direction in the vicinity of one side edge of the face material 4 (in the illustrated case, in the vicinity of the lower edge). And a plurality of bolt holes are provided, and the face member 4 is fixed to the concrete structure 1 via a steel fixing bracket 5 having a substantially L-shaped cross section. One end side 6 of the steel fixing bracket 5 is attached by a bolt 7 inserted through these bolt insertion holes and a nut screwed and tightened thereto, and the other end side 8 of the steel fixing bracket 5 is a concrete structure. It is fixed by bolts 10 to female threaded inserts 9 that are embedded and fixed in the beam 13 or floor slab 14 of the object 1. The fixing bracket 5 may have a substantially L-shaped cross section as shown in FIG. 8, a substantially T-shaped cross section as shown in FIG. 22 (a), or one end side as an inner vertical portion and an outer side as shown in FIG. 22 (b). As a whole, there may be an L-shaped fixing bracket having a vertical attachment portion, and the fixing bracket 5 may be any shape as long as it can support a face material.

  As the fixing means for the other end 8 of the steel fixing bracket 5, an appropriate number of anchor bolt holes are provided in a straight line at intervals in the beam, floor slab, ceiling slab, and column of the concrete structure 1, The bolt is fixed by an adhesive filled in the anchor bolt hole, and the anchor bolt is inserted into a bolt hole such as a long hole on the other end side 8 of the steel fixing bracket 5 and fixed with a nut or the like. Means can be employed.

  As shown in FIG. 10 and FIG. 11, the fixing metal 5 is attached to the side wall 2a of the seismic reinforcing face member 11 with the viscoelastic body, as shown in FIGS. If it is attached to the slab 14, the one end portion of the seismic reinforcing face member 11 with viscoelastic body can be positioned, so that the seismic reinforcing face member 11 with viscoelastic body can be accurately provided. In addition, you may attach to the beam 13 or the floor slab 14 after providing the earthquake-proof reinforcement surface material 11 with a viscoelastic body. In addition, although illustration is abbreviate | omitted, you may make it fix the fixture 5 to a ceiling slab or the beam of the upper floor side, or you may make it fix to the pillar 15 as shown in FIG.

  When the fixing bracket 5 and the face member 4 are fixed by bolts, either one of the bolt holes is appropriately long or a slightly larger through hole so that the position adjustment of the fixing member 5 or the face member 4 such as a flat plate is easy. Just keep it as.

  As the material of the viscoelastic body 3 of each of the embodiments, an acrylic viscoelastic body, a diene viscoelastic body, an asphalt viscoelastic body, a silicon viscoelastic body, and the like can be used. Although it depends on the viscoelastic material, the thickness may be about 2 mm to 40 mm.

  In addition, the thickness dimension of the face material 4 of each embodiment is not particularly specified, but when it is a plate material, the thickness dimension may be about 6 mm to 40 mm, and the strength and rigidity are insufficient. In this case, as shown in FIG. 16, the reinforcing member 12 such as a reinforced steel plate or a shaped steel is attached by welding or a fixing means such as a bolt so as to be superposed on the outer surface of the facing member 4 and the reinforcing member 4 is reinforced. You may make it do.

  Even if the face material 4 is peeled off from the viscoelastic body 3 at the time of an earthquake, the face material 4 is held by the fixing bracket 5, but when the face material 4 is peeled by an external force in the out-of-plane direction, the face material 4 falls. When there is a fear, as shown in FIG. 12 and FIG. 13, other side edge portions other than the fixing bracket 5 of the one side edge portion attached to the face material 4 (in the illustrated embodiment, the lower side of the face material 4 The one end side of the fall prevention member 16 for preventing the fall of the face material 4 is disposed in close proximity to or in contact with the fixing bracket 5 on the opposite side), and the other end side of the fall prevention member 16 is disposed on the side surface. It can be fixed in a structural element such as a beam, column, ceiling slab or floor slab other than 2a or side surface 2a by being embedded and fixed (in the case of illustration) or by appropriate fixing means such as a bolt.

  In the above-described embodiment, the fixing metal 5 is attached to the face material 4 by using a separate member from the face material 4. However, when the present invention is implemented, the fixing metal 5 is fixed to the face material 4 in advance. In this state, the face material 4 may be provided by being attached to the side surface 2a, or the face material 4 configured so that the portion corresponding to the fixing metal fitting 5 is integrally connected to the face material 4 in a refractive manner. May be.

  When the present invention is implemented, when the side door 2a such as a wall has an entrance / exit 18 such as an entrance door or a window or the like, as shown in FIG. You may make it use the surface material 4 with an opening part of the shape which cut the slightly larger opening part 19, or as shown in FIG. You may combine suitably the face material 4 which has the notch part 20 notched in this.

  The size and shape of the face material 4 are not particularly specified. However, as the area of the face material 4 increases, the rigidity decreases and the manufacture becomes difficult. In addition, the small rectangular face material 4 may be divided into a plurality of blocks and divided. When the face material 4 is thus blocked, as shown in FIG. Alternatively, the adjacent face members 4 spaced apart in the lateral direction may be connected to each other by arranging the connecting member 17 such as a steel plate so as to overlap or engage with each other. As the fixing means for the connecting member 17, fixing means such as bolts or welding can be applied as appropriate. When the face materials are connected to each other through the connecting member 17 in this way, the blocked face materials can be connected by the connecting member to behave integrally.

  When implementing this invention, as shown in FIG. 18, while providing the seismic reinforcement surface material 11 with a viscoelastic body on the side surface 2a of the pillar 15 in the concrete structure 1 by attaching etc., the seismic reinforcement surface with a viscoelastic body is provided. The face material 4 of the material 11 may be fixed to a portion other than the column 15 via the fixing bracket 5 so that the column 15 is seismically reinforced.

  As a construction procedure of the seismic reinforcement structure of the present invention, as described above, the viscoelastic body 3 is provided on the side surface (surface) 2a of the wall or the like of the concrete structure 1 by pasting or the like. The face material 4 is provided on the outer surface by attaching the face material 4 to the portion other than the side surface 2a of the concrete structure 1 by providing the viscoelastic body-attached seismic reinforcing face material 11 by attaching the surface material 4 to the outer surface. What is necessary is just to fix directly or indirectly using the fixing bracket 5 etc., and the construction is a simple earthquake-proof reinforcement method.

  When the viscoelastic body 3 is bonded to the side surface 2a such as the inner wall surface or the outer wall surface of the concrete structure 1 by using the viscosity of the viscoelastic body 3, the viscoelastic body 3 is previously formed into a sheet on release paper. The sheet-like viscoelastic body 3 may be formed and attached to the side surface 2a such as a wall surface.

  When practicing the present invention, the face material 4 may be fixed to any of the beam 13, the floor slab 14, the ceiling slab 14, and the column 15 in the concrete structure 1.

  In the present invention, as in each of the above embodiments, the viscoelastic body 3 may be provided on one surface of the concrete structure 1 by pasting or the like, and the face material 4 may be provided on the viscoelastic body 3 by pasting or the like. The viscoelastic body 3 and a face material 4 such as a flat plate may be provided on the side surfaces 2a of the front and back surfaces of the structure 1 by pasting or the like. Further, the viscoelastic body 3 and the face material 4 may be provided on each side surface 2a constituting the side peripheral surface of the column 15 by pasting or the like to be seismically reinforced.

  As shown in FIG. 20, when the present invention is implemented, in the case of the seismic reinforcement structure in which the viscoelastic body 3 and the face material 4 are provided on one side surface or both side surfaces of the concrete structure 1, A through-hole may be provided in the concrete structure 1 portion such as the wall 2, the viscoelastic body 3, and the face material 4, and the face material 4 may be held by the fastening bolts and nuts 21 penetrating them. In this case, the viscoelastic body 3 and the face material 4 or the concrete structure 1 portion can be prevented from being peeled off, and the face material 4 can be prevented from falling, and a stable pasting state can be maintained at all times. Can exhibit the damping force. In addition, as an arrangement | positioning form of the through-hole provided in the concrete structure 1 part, the viscoelastic body 3, and the face material 4, it is a horizontal direction in one central part of the face material 4, or the vertical direction center part of the face material 4, for example. Appropriate arrangement forms such as a plurality of locations may be used, both of the form of FIGS. 6 and 7 etc. in which the face material 4 is fixed to the concrete structure 1 or the form of FIG. 1 etc. in which the face material 4 is not fixed to the concrete structure 1. Applicable to form.

  In the embodiment shown in FIGS. 20A and 20B, when the concrete structure 1 side is deformed and the viscoelastic body 3 is sheared, the fastening bolt 21 follows the concrete structure 1 side such as the wall 2. In this case, since the hole on the face material 4 side is a relatively large hole, the face material 4 is held by tightening the bolt 21 or the nut via the relatively large-sized seat ring 23. The bolts 21 and nuts are members for holding the face material 4 so as not to be separated from the concrete structure 1, and for firmly fixing the face material 4 to the concrete structure 1 to behave integrally. It is not a member.

  Although it is necessary to calculate the additional attenuation due to the seismic reinforcement of the concrete structure 1, in the case of the concrete structure subjected to the seismic reinforcement as in the present invention, when calculating the additional attenuation, as shown in FIG. It can be calculated in consideration of both the energy absorption effect due to the crack 22 of the concrete such as the concrete wall 2 and the like and the energy absorption effect due to the viscoelastic body 3 when an external force such as a force is applied. Can be used as an economical and rational seismic reinforcement structure.

  When carrying out the present invention, when a large number of holes or recesses are regularly arranged in the face material 4 at intervals, the reinforced concrete structure is seismically reinforced with an aesthetically superior appearance without impairing the appearance of the reinforced concrete structure 1. For example, as shown in FIG. 23 or FIG. 24, a large number of polygonal holes or recesses 24 such as diamonds or rhombuses are formed in the face material 4 at regular intervals in a lattice pattern or a staggered pattern. It is good to arrange in a shape so as to enhance the design aesthetics. In this way, the seismic reinforcement generally reinforces the building by attaching braces and wall materials to the building, so the appearance is impaired, but this can be prevented, the appearance is improved, and the design is excellent in earthquake resistance. A reinforcing structure can be used.

It is a front view which shows the earthquake-proof reinforcement structure which concerns on 1st Embodiment of this invention. (A) And (b) is the sectional view on the AA line of FIG. It is a vertical cross-sectional side view which expands and shows the fixing | fixed part vicinity of a face material lower end part and a concrete structure. It is a partially longitudinal front view which shows the behavior at the time of the earthquake of the concrete structure which has a seismic reinforcement structure which concerns on 1st Embodiment of this invention. The construction procedure in the case of implementing the earthquake-proof reinforcement structure concerning 1st Embodiment of this invention is shown, Comprising: It is a front view which shows the state which fixed the base material of the side wall surface and attached the fixing metal fitting. It is a front view which shows the earthquake-proof reinforcement structure which concerns on 2nd Embodiment of this invention. (A) And (b) is the BB sectional drawing of FIG. It is a vertical cross-sectional side view which expands and shows the fixing | fixed part vicinity of a face material lower end part and a concrete structure. It is a partially longitudinal front view which shows the behavior at the time of the earthquake of the concrete structure which has a seismic reinforcement structure which concerns on 2nd Embodiment of this invention. It is a front view which shows the construction procedure in the case of implementing the earthquake-proof reinforcement structure which concerns on 2nd Embodiment of this invention, Comprising: The base material of a side wall surface is adjusted and the state which attached the fixing metal fitting. It is CC sectional view taken on the line of FIG. It is a front view which shows the state attached to the concrete structure while arrange | positioning the fall prevention member to the upper part side of a face material. It is the DD sectional view taken on the line of FIG. When a concrete structure has an opening part, it is a partial longitudinal cross-sectional front view which shows the other form at the time of carrying out earthquake-proof reinforcement of a concrete structure using the face material which has an opening part. It is a partial longitudinal cross-sectional front view which shows the other form at the time of carrying out earthquake-proof reinforcement of a concrete structure using the face material divided | segmented into plurality when a concrete structure has an opening part. It is a front view which shows one Embodiment at the time of reinforcing the outer surface of a face material with a reinforcement member. It is a front view which shows the state which connected the adjacent face materials with the connection member by the connection member. It is a front view which shows embodiment which provided a viscoelastic body in the column in a concrete structure, provided a face material through this, and fixed the face material to the floor slab or the beam. It is a front view which shows embodiment which attached the fixture to the pillar. (A) And (b) is a vertical side view which shows embodiment in the case of fixing with the fastening bolt which penetrates a concrete structure, a viscoelastic body, and a face material. It is explanatory drawing in the case of calculating the addition attenuation | damping by seismic reinforcement of a concrete structure. It is a longitudinal vertical side view which expands and shows the fixing | fixed part vicinity of a face material lower end part at the time of using the fixing bracket of another form, and a concrete structure. It is a partially longitudinal front view showing a form in which a large number of circular holes or recesses are regularly arranged in the face material at intervals. It is a partially longitudinal front view showing a form in which a large number of polygonal holes or recesses are regularly arranged in the face material at intervals.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforced concrete structure 2 Wall 2a Wall surface 3 Viscoelastic body 4 Face material 5 Fixing bracket 6 One end side 7 Bolt 8 The other end side 9 Female threaded insert 10 Bolt 11 Seismic reinforcement surface material with viscoelastic body 12 Reinforcement material 13 Beam 14 Floor slab (Or ceiling slab)
15 Pillar 16 Fall prevention member 17 Connecting member 18 Opening 19 Opening 20 Notch 21 Tightening bolt / nut 22 Concrete crack 23 Seat guard 24 Hole or recess

Claims (15)

A viscoelastic body is provided on one side surface or both side surfaces of the concrete structure, and a face material is provided on the outer surface of the viscoelastic body, and one side portion of the face material is a portion other than the side surface in the concrete structure. Seismic reinforcement structure, characterized in that it is fixed to the door via a fixing bracket. A viscoelastic body is provided on one or both sides of a concrete structure, a face material is provided on the outer surface of the viscoelastic body, and the face material is not fixed to the concrete structure. Seismic reinforcement structure. The fixing bracket is a steel fixing bracket having a substantially L-shaped or substantially T-shaped cross section, and one end of the fixing bracket is attached to a face material with a bolt and a nut, and the other end of the steel fixing bracket is fixed to a concrete structure. The earthquake-proof reinforcement structure according to claim 1, wherein The seismic reinforcement structure according to any one of claims 1 to 3, wherein the adjacent face members are connected to each other by a connecting member. The seismic reinforcement structure according to claim 1, wherein a reinforcing member is fixed and reinforced on the outer surface of the face material. The fall prevention member for preventing the fall of the face material is disposed so as to oppose the outer surface of the face material, and is attached to the concrete structure. Seismic reinforcement structure. A viscoelastic body is provided on one or both sides of the concrete structure, and a face material is provided on the outer surface of the viscoelastic body, and further, by a fastening bolt that penetrates the concrete structure, the viscoelastic body, and the face material. A face material is held, and the earthquake-proof reinforcement structure according to any one of claims 1 to 6. The seismic reinforcement structure according to claim 1, wherein the face material is a flat face material, or a flexible face material such as a film-like face material or a sheet-like face material. The seismic reinforcement structure according to any one of claims 1 to 8, wherein a large number of holes or recesses are regularly provided in the face material at intervals. The calculation of the additional attenuation by the seismic reinforcement of the concrete structure can be calculated in consideration of both the energy absorption effect by the crack of the concrete and the energy absorption effect by the viscoelastic body. Seismic reinforcement structure. A seismic reinforcement method comprising providing a viscoelastic body on one or both sides of a concrete structure and then providing a face material on the outer surface of the viscoelastic body. The viscoelastic body is provided on one or both sides of a concrete structure, and then the face material is provided on the outer surface of the viscoelastic body without fixing the face material to the concrete structure. Reinforcement method. After providing the viscoelastic body on one or both sides of the concrete structure, a face material is provided on the outer surface of the viscoelastic body, and the face material is attached to a portion other than the side surface of the concrete structure via a fixing bracket. Seismic reinforcement method characterized by fixing. After providing the viscoelastic body side on one side or both side surfaces of the concrete structure in the seismic reinforcing surface material with viscoelastic body to which the viscoelastic body is fixed in advance on one side of the face material, the side material is the side in the concrete structure. A seismic reinforcement method characterized by fixing to a portion other than a wall surface via a fixing bracket. After the viscoelastic body side is provided on one side or both sides of the concrete structure in the seismic reinforcing surface material with viscoelastic body, which has a viscoelastic body fixed in advance on one side of the face material, the face material is not fixed to the concrete structure Seismic reinforcement method characterized by that.

Images