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CN212642223U - CFRP cloth and concrete component assembled steel core concrete column of consolidating - Google Patents

CFRP cloth and concrete component assembled steel core concrete column of consolidating Download PDF

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Publication number
CN212642223U
CN212642223U CN202021036871.6U CN202021036871U CN212642223U CN 212642223 U CN212642223 U CN 212642223U CN 202021036871 U CN202021036871 U CN 202021036871U CN 212642223 U CN212642223 U CN 212642223U
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concrete
steel pipe
column
cfrp cloth
steel
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CN202021036871.6U
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朱闯
史明俊
张黎明
李欣
胡忠君
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Jilin Province Thermal Engineering Design Research Co ltd
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Jilin Province Thermal Engineering Design Research Co ltd
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Abstract

The invention discloses a CFRP cloth and concrete component assembled reinforced concrete-filled tubular column, which comprises a concrete column, a square steel tube, a plurality of arc concrete components and CFRP cloth, wherein the concrete column is arranged in the steel tube, the arc concrete components are arranged on the outer side of the steel tube, the straight surfaces of the arc concrete components are tightly attached to the steel tube, the outer surface of the arc concrete components tightly attached to the steel tube is round, and the CFRP cloth is wrapped on the outer sides of the arc concrete components. The overall reinforcement time of the component can be significantly reduced.

Description

CFRP cloth and concrete component assembled steel core concrete column of consolidating
Technical Field
The utility model relates to a steel-concrete composite construction consolidates technical field, in particular to CFRP cloth and concrete unit assembled steel core concrete column of consolidating.
Background
The CFRP cloth has the advantages of light weight, high strength, convenient construction, good corrosion resistance and the like, and is widely applied to the field of existing concrete structure reinforcement and modification.
The steel tube Concrete (CFST) column is a member formed by filling concrete in a steel tube, the application of the steel tube Concrete (CFST) column in engineering has been in the history of nearly one hundred years, the cross section of a common steel tube concrete column mainly has the shape of a circle, a rectangle (square), a polygon and the like, and the square steel tube concrete (SCFST) column has the advantages of simple node connection structure, convenience in construction and the like, so that the engineering application field is expanded year by year.
The existing SCFST column is influenced by external environments such as acid rain, moisture, chloride ion corrosion and the like, and the corrosion problem is easy to occur when the component is not maintained in time, so that the durability of the component is reduced; meanwhile, due to the reasons of structural use function change, load increase, seismic fortification intensity improvement and the like, the existing SCFST column also has the potential reinforcement requirement of bearing capacity improvement.
The reinforcement method adopted by the SCFST column at present comprises a bonded steel reinforcement method, a section-enlarging reinforcement method and the like, but the two reinforcement methods have defects, the section-enlarging reinforcement method is long in reinforcement construction period and difficult to adopt for projects needing rapid reinforcement, and the bonded steel reinforcement method has the problems that after reinforcement, the members are still exposed to the environment effects of humid air, acidic corrosive gas and the like, the members are easy to corrode, and the bonded steel reinforcement method cannot improve the durability of the existing SCFST column.
The CFRP cloth is used for enabling the core concrete to be in a three-dimensional compression state, meanwhile, buckling deformation of the square steel pipe can be prevented, a dual-restraint effect is achieved, the bearing capacity and ductility of the component can be improved, the corrosion resistance and durability of the square steel pipe can be improved, and the CFRP reinforcing method has the dual advantages of improving the bearing capacity and durability of the component and is an effective reinforcing method.
Use CFRP cloth to consolidate SCFST post, the difficult problem that faces at present is that component outside square steel pipe can't carry out the chamfer processing like ordinary concrete column, and then can't eliminate the bight stress concentration problem that outsourcing CFRP cloth brought, leads to CFRP cloth to be cut off easily in bight, and FRP hoop is effective to draw the strain lower, and CFRP cloth can't obtain make full use of for the reinforcement effect has certain limitation.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the limitation problem among the background art, provide a SCFST post is consolidated to CFRP cloth and concrete unit assembled.
A CFRP cloth and concrete component assembled type reinforced concrete-filled steel tube column comprises a concrete column, a square steel tube, a plurality of arc concrete components and CFRP cloth, wherein the concrete column is arranged in the steel tube;
the steel pipe is a regular quadrilateral steel pipe, the straight edge of the circular arc concrete component is the same as the length of each edge of the steel pipe, and the outer surface formed after the circular arc concrete component is installed on each edge of the steel pipe is circular;
fixed steel cable grooves are formed in two sides of the arc concrete component;
the steel pipe is a regular quadrilateral steel pipe.
The utility model discloses a theory of operation and process:
firstly, treating the outer surfaces of the steel tube and the concrete column: cleaning rust on the outer surface of the steel pipe by using a grinding machine, and wiping the surface of the steel pipe by using cleaning agents such as acetone and the like; so as not to influence the adhesion between the steel pipe and the concrete component;
utilizing a PVC mould or a steel mould to prepare the arc concrete component: cutting the PVC pipe or the steel pipe to form circular arc segments according to the middle smearing height, and adopting a structural stiffening plate to ensure the integral stability of the die; the inner diameter of the PVC pipe or the steel pipe has certain requirements, the PVC pipe or the steel pipe is cut according to the middle smearing height, and the rounding degree is determined by the middle smearing height; the end part of the mould is fixed by a PVC plate or a steel plate, so that the integrity of the circular arc concrete component is ensured when pouring is convenient; the PVC plate or the steel plate has accurate size, and no gap is ensured at the interface;
pasting the arc concrete component: the arc concrete assembly is aligned and adhered to the integral outer surface formed by the steel tube and the concrete column by using structural adhesive glue, and the arc concrete assembly, the steel tube and the concrete column are integrally fastened for 48 hours by using an adjustable steel ring; the structural adhesive glue comprises the following components in percentage by weight: the epoxy resin, the curing agent and the silicon dioxide microspheres are 5: 1: 10, the silicon dioxide has the functions of strengthening and toughening and improves the binding power; the adjustable steel ring has the function of fixing the whole body and maintaining the stability of the structure;
pasting CFRP cloth: uniformly smearing impregnating adhesive on the surface of the arc concrete component, slightly pressing CFRP (carbon fiber reinforced plastics) cloth on a pasting part by hands, uniformly smearing the impregnating adhesive on the surface of the CFRP cloth, rolling and extruding bubbles along the fiber direction for multiple times, wherein the CFRP cloth adopts high-strength first-stage or high-strength second-stage carbon fiber cloth, and the matched impregnating AB adhesive is 2: 1, mixing uniformly and then directly using; when the CFRP cloth is pasted, the lapping length is 100mm, the CFRP cloth is restrained by the end part of the reinforcing member, and two layers of CFRP cloth with the pasting width of 100mm are wound at the two ends; repeatedly rolling the CFRP cloth by using a scraper when the CFRP cloth is pasted until the CFRP cloth is completely soaked;
in actual engineering, the existing SCFST column is large in section size and column height, the circular arc concrete component is prefabricated in sections and installed in sections, and annular fixed steel cable grooves are reserved at two ends of each section.
The arc concrete subassembly adopts the mill prefabrication, and every section unit length is 2m, and annular fixed cable wire recess is reserved to each segmentation both sides, specifically is: a prefabricated groove with the depth of 10mm and the height of 20mm is engraved at a position 0.3m away from the upper end and the lower end,
after the circular arc concrete component is pasted, an annular steel cable is embedded into the groove to be integrally fixed, and the reinforced concrete component is connected and bonded with the steel pipe;
after the steel cable is installed and fixed, the surface of the groove can be smoothed by epoxy resin cement mixture, so that the continuity of the vertical joint is ensured;
and C, adhering the CFRP cloth after the circular-arc concrete component is adhered and completely cured, and cooperatively stressing and jointly working the steel pipe and the CFRP cloth to form the CFRP cloth and concrete component combined assembly type restrained square steel pipe concrete (SCFST) column.
The utility model has the advantages that:
the utility model provides a CFRP cloth and circular arc concrete subassembly jointly consolidate steel core concrete column, core concrete is in dual restraint state, and concrete subassembly can show and increase the effective confined area of core concrete and improve square steel core bight stress concentration, and then improve the vertical bearing capacity of the square steel core concrete column that is consolidated, and simultaneously, the durability of steel core concrete column can be showing to promote in the existence of CFRP cloth, the utility model discloses a transition is carried out to utilizing prefabricated assembled circular arc concrete subassembly between CFRP cloth and steel pipe, and prefabricated assembled circular arc concrete subassembly can not only effectively eliminate CFRP cloth bight stress concentration problem, makes the effective confined area in cross-section increase again, can fully improve the utilization efficiency of CFRP cloth, if the prefabricated concrete subassembly adopts the mode of prefabricating in the factory, field assembly, can show the whole reinforcement time that reduces the component, the prefabricated reinforced column is particularly suitable for the construction period shortening of the reinforcement and reconstruction of steel pipe concrete projects such as rapid emergency after earthquake, subways, viaducts and the like.
Drawings
FIG. 1 is a schematic view of a mold for making an outer concrete package of the present invention;
FIG. 2 is a schematic view of the combined assembly type reinforced concrete-filled steel tubular column made of CFRP cloth and concrete components according to the present invention;
FIG. 3 is a schematic cross-sectional view of the combined assembly type reinforced concrete filled steel tubular column made of CFRP cloth and concrete components according to the present invention;
FIG. 4 is a schematic view of the sectional assembly in the practical engineering application of the present invention;
Detailed Description
Referring to fig. 1 to 4, a CFRP cloth and concrete component assembled reinforced concrete-filled tubular column includes a concrete column 1, a steel tube 2, a plurality of arc concrete components 3 and a CFRP cloth 4, wherein the concrete column 1 is disposed in the steel tube 2, the arc concrete components 3 are disposed outside the steel tube 2, a straight surface of the arc concrete components 3 is closely attached to the steel tube 2, an outer surface of the arc concrete components 3 closely attached to the steel tube 2 is circular, and the CFRP cloth 4 is wrapped outside the arc concrete components 3;
the steel pipe 2 is a regular quadrilateral steel pipe, the straight edge of the circular arc concrete component 3 is the same as the length of each edge of the steel pipe 2, and the outer surface formed after the circular arc concrete component 3 is installed on each edge of the steel pipe 2 is circular;
fixed steel cable grooves are formed in two sides of the arc concrete component 3;
the steel pipe 2 is a square steel pipe.
The utility model discloses a theory of operation and process:
the outer surfaces of the steel pipe 2 and the concrete column 1 are firstly treated: cleaning rust on the outer surface of the steel pipe 2 by using a grinding machine, and wiping the surface of the steel pipe by using cleaning agents such as acetone and the like; so as not to influence the adhesion between the steel pipe and the concrete component;
utilizing a PVC mould or a steel mould to prepare the arc concrete component 3: cutting the PVC pipe or the steel pipe to form circular arc segments according to the middle smearing height, and adopting a structural stiffening plate to ensure the integral stability of the die; the inner diameter of the PVC pipe or the steel pipe has certain requirements, the PVC pipe or the steel pipe is cut according to the middle smearing height, and the rounding degree is determined by the middle smearing height; the end part of the mould is fixed by a PVC plate or a steel plate, so that the integrity of the circular arc concrete component 3 is ensured when pouring is convenient; the PVC plate or the steel plate has accurate size, and no gap is ensured at the interface;
pasting the arc concrete component 3: the arc concrete component 3 is aligned and adhered to the integral outer surface formed by the steel tube 2 and the concrete column 1 by using structural adhesive glue, and the arc concrete component 3, the steel tube 2 and the concrete column 1 are integrally fastened for 48 hours by using an adjustable steel ring; the structural adhesive glue comprises the following components in percentage by weight: the epoxy resin, the curing agent and the silicon dioxide microspheres are 5: 1: 10, the silicon dioxide has the functions of strengthening and toughening and improves the binding power; the adjustable steel ring has the function of fixing the whole body and maintaining the stability of the structure;
pasting the CFRP cloth 4: uniformly smearing impregnating adhesive on the surface of the arc concrete component 3, slightly pressing the CFRP cloth 4 on a pasting part by hand, uniformly smearing the impregnating adhesive on the surface of the CFRP cloth 4, rolling and extruding bubbles along the fiber direction for multiple times, wherein the CFRP cloth 4 adopts high-strength first-stage or high-strength second-stage carbon fiber cloth, and the matched impregnated AB adhesive is 2: 1, mixing uniformly and then directly using; when the CFRP cloth 4 is pasted, the lapping length is 100mm, the CFRP cloth is used for restraining the end part of the reinforcing member, and two CFRP cloth layers with the pasting width of 100mm are wound at the two ends; repeatedly rolling the CFRP cloth 4 by using a scraper when the CFRP cloth 4 is pasted until the CFRP cloth 4 is completely soaked;
in the actual engineering, because the existing SCFST column has larger section size and column height, the circular arc concrete component 3 is prefabricated in sections and installed in sections, and annular fixed steel cable grooves are reserved at two ends of each section.
The arc concrete component 3 is prefabricated in a factory, the unit length of each section is 2m, and annular fixed steel cable grooves are reserved on two sides of each section, and the arc concrete component specifically comprises the following steps: a prefabricated groove with the depth of 10mm and the height of 20mm is engraved at a position 0.3m away from the upper end and the lower end,
after the arc concrete component 3 is adhered, an annular steel cable is embedded in the groove for integral fixation, and the reinforced concrete component is connected and bonded with the steel pipe;
after the steel cable is installed and fixed, the surface of the groove can be smoothed by epoxy resin cement mixture, so that the continuity of the vertical joint is ensured;
and after the circular arc concrete component 3 is adhered and completely cured, adhering the CFRP cloth 4, and cooperatively stressing and jointly working the steel pipe and the CFRP cloth to form the CFRP cloth and concrete component combined assembly type restrained square steel pipe concrete (SCFST) column.

Claims (3)

1. The utility model provides a CFRP cloth and concrete unit assembled steel core concrete column of consolidating which characterized in that: including concrete column (1), steel pipe (2), several circular arc concrete subassembly (3) and CFRP cloth (4), concrete column (1) sets up in steel pipe (2), circular arc concrete subassembly (3) set up in the steel pipe (2) outside, circular arc concrete subassembly (3) straight face pastes tightly with steel pipe (2) mutually, the surface that several and steel pipe (2) pasted tight circular arc concrete subassembly (3) mutually constitutes is circular, CFRP cloth (4) parcel is in the outside of several circular arc concrete subassembly (3).
2. The fabricated reinforced concrete-filled tubular column of claim 1, wherein: the steel pipe (2) is a regular quadrilateral steel pipe, the straight edge of the circular arc concrete component (3) is the same as the length of each edge of the steel pipe (2), and the outer surface formed after the circular arc concrete component (3) is installed on each edge of the steel pipe (2) is circular.
3. The fabricated reinforced concrete-filled tubular column of claim 1, wherein: and fixed steel cable grooves are formed in two sides of the arc concrete component (3).
CN202021036871.6U 2020-06-09 2020-06-09 CFRP cloth and concrete component assembled steel core concrete column of consolidating Active CN212642223U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021036871.6U CN212642223U (en) 2020-06-09 2020-06-09 CFRP cloth and concrete component assembled steel core concrete column of consolidating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021036871.6U CN212642223U (en) 2020-06-09 2020-06-09 CFRP cloth and concrete component assembled steel core concrete column of consolidating

Publications (1)

Publication Number Publication Date
CN212642223U true CN212642223U (en) 2021-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114753406A (en) * 2022-03-11 2022-07-15 中建八局轨道交通建设有限公司 Reinforced structure for mounting platform plate of half-height safety door and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114753406A (en) * 2022-03-11 2022-07-15 中建八局轨道交通建设有限公司 Reinforced structure for mounting platform plate of half-height safety door and construction method thereof

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