JP2894217B2 - Building structural frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural frame of a building having one or two floors above and below ground.

[0002]

2. Description of the Related Art In general, in the construction of a building having a basement floor, an underground portion of the building first constructs a retaining wall,
The inside of this retaining wall is dug down to the flooring surface, and then constructed.

[0003] In this case, a large number of temporary materials are required because a large number of uprights and cut beams need to be bridged inside the mountain retaining wall so that the mountain retaining wall does not collapse due to digging of the ground. However, there is a problem in that a lot of time and labor is spent, the construction period is inevitably prolonged, and temporary construction costs are increased.

In addition, the above-ground part is constructed after the underground part is constructed, and the joint between the column and the beam has a rigid frame structure or a staggered structure irrespective of the RC structure or the S structure. However, there were problems such as complicated construction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and simplifies temporary construction work when constructing an underground part and simplifies a joint between a pillar and a beam in the ground part. It is an object of the present invention to provide a structural frame of a building capable of shortening the construction period, reducing the construction cost, and further improving the workability.

[0006]

According to the present invention, there is provided a structural frame of a building comprising a pillar on the first basement, a beam on the first floor and a pillar on the first floor which are constructed on the pillar. It is constructed by using reinforced concrete, constructing a beam on the top floor erected at the upper end of the column with a steel frame material, and joining the beam with the column on the first floor by pinning.

[0007]

【Example】

Embodiment 1 FIG. 1 to 4 show an embodiment of a structural frame of a building according to the present invention. In the drawings, reference numeral 1 denotes a frame of a building under construction, and 2 denotes a frame 1 built on the first basement floor.
3a and 3b are the first floor beams, 4 is the second floor beams, 5 is the basement first floor columns, 6 is the first floor columns, 7 is the first floor slab,
8 is a floor slab on the second floor, and 9 is a retaining wall constructed around the frame 1 to construct the frame 1.

The base beam 2, the beam 3a, the columns 5 and the columns 6 are all made of reinforced concrete. Furthermore,
The beam 4 is constructed of a steel frame material such as an H-section steel.

Reference numeral 5a denotes the frame 1 during the construction of the frame 1.
Since it is a temporary material for supporting the concrete, it is finally buried in the concrete of the pillar 5, but the pillar 5 is designed not as steel reinforced concrete but as reinforced concrete.

In order to join the end of the beam 4 to the upper end of the column 6, for example, an anchor bolt is projected from the upper end of the column 6, and the end of the beam 4 is connected to the column via the anchor bolt. No bending moment is generated at the joint, for example, by joining to the upper end of 6.

The floor slabs 7 and 8 are constructed by laying a PC board on the beams 3a and 4 or laying a deck plate and casting concrete thereon.

In such a configuration, the first floor pillar 6
Is a cantilever with the beam 3a on the first floor as the fixed end and the beam 4 on the second floor
Is designed as a simple beam with the column 6 as a fulcrum (see FIG. 7). Therefore, the beam 4 does not need to be processed so that the joint with the column 6 becomes a rigid joint, and is a steel frame material with a very small degree of processing. Can be built with

Embodiment 2 FIG. FIG. 5 shows another embodiment of the structural frame of the building according to the present invention.
The same parts as those described above are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 10 denotes a column on the second floor, and 11 denotes a beam on the roof floor. In each case, a steel frame material such as an H-section steel is used.
The beam 10 is joined to the beam 11 by bolt joints using high-strength bolts. In principle, no bending moment is generated at the joint (see FIG. 6). In some cases.

Embodiment 3 FIG. Next, a method of constructing a structural frame of a building according to the present invention will be described step by step.

(1) First, a retaining wall 9 is constructed at a predetermined depth around the frame 1 to be constructed. The retaining wall 9 is constructed by a generally used construction method such as a parent pile horizontal sheet pile construction method or an SMW construction method.

(2) Next, at the position of the pillar 5 to be constructed, a straight pillar 5a is installed at a predetermined depth. While the frame 1 is being constructed, the pillar 5a functions as a temporary pillar for supporting the frame under construction.
Section steel or the like is used.

(3) Next, the inside of the retaining wall 9 is excavated at a constant depth over the whole. The excavation depth in this case shall be slightly below the lower end of the beams 3a, 3b to be constructed.

(4) Next, the beam 3
Construct a, 3b. The beams 3a and 3b are constructed by a reinforced concrete structure, and are bridged over the upper end of the timber column 5a.

(5) Next, the inside of the retaining wall 9 is further excavated by using the beam 3b constructed along the retaining wall 9 as a bulge, and using the beam 3a bridged at right angles thereto as a cutting beam. Dig down slightly below the foundation beam 2 to be built.

In this case, since the beams 3a and 3b can be used as bulging and cutting beams for supporting the retaining wall 9, it is necessary to dare install the bulging and cutting beams for supporting the retaining wall 9. Therefore, temporary construction can be omitted.

(6) Next, the excavated bottom is leveled, and the foundation beam 2 is built thereon integrally with the foundation slab (not shown).

(7) Next, a necessary amount of reinforcing steel bars (not shown) are arranged around the trussed pillars 5a, and concrete is cast into the pillars 5 having a reinforced concrete structure to form a foundation beam 2
And the beam 3a, 3b.

(8) Next, the pillar 6 is constructed on the pillar 5 by reinforced concrete. The pillar 6 is constructed so as to be continuous with the pillar 5.

(9) Next, the beam 4 is bridged over the upper end of the column 6. The beam 4 is made of a steel material such as an H-section steel, and the beam 4 is joined to the upper end of the column 6 by bolting using a high-strength bolt.

(10) Finally, a PC board or a deck plate is laid on the beams 3 and 4 and concrete is cast on the deck plate and the like, and the floor slab 7 is laid.
To build.

Embodiment 4 FIG. FIG. 7 shows another embodiment of the method of constructing a structural frame of a building according to the present invention, wherein a retaining wall 9 is provided.
Is supported on the ground having extremely large supporting strength, a bracket 10 is protruded horizontally on the side of the beam 3a, and the bracket 10 is placed on a steel pile (not shown) in the retaining wall 9;
The load of 3a is applied to the retaining wall 9, and according to this embodiment, there is an effect that the steel pillars originally installed around the frame 1 and the labor for installing them can be omitted.

[0028]

The present invention is constructed as described above, and the beam on the first floor constituting the structural frame of the building is constructed of reinforced concrete having extremely high rigidity. Since the beams on the floor can be used as ridges and beams to support the retaining wall built around the structural frame, there is no need to install ridges or beams, and temporary construction work in the underground is omitted. This has the effect of greatly reducing construction costs and temporary construction costs.

Further, since the first-floor columns are constructed on the first-floor beams integrally with the beams by reinforced concrete having extremely high rigidity, the first-floor portions have extremely high strength and horizontal rigidity. There is no need to install earthquake-resistant elements such as earthquake-resistant walls and streaks, and there is an effect that walls and the like can be constructed with non-structural materials.

Further, the beam on the top floor, which is erected at the upper end of the column, is constructed of a steel frame material, and the beam and the column are joined with pins using an anchor bolt or the like. There is no need to perform a complicated process to form a rigid joint at the end of the slab, which simplifies the construction and has the effect of greatly improving the workability.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along a line aa in FIG. 2 showing an embodiment of a structural frame structure of a building according to the present invention.

FIG. 2 is a longitudinal sectional view of a structural frame of the building shown in FIG. 1;

FIG. 3 is a sectional view taken along line bb of the structural frame of the building shown in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a construction method of a structural frame of a building according to the present invention.

FIG. 5 is a longitudinal sectional view showing another embodiment of the structural frame of the building according to the present invention.

FIG. 6 is a stress diagram of a structural frame of a building according to the present invention.

FIG. 7 is a longitudinal sectional view showing another construction method of the structural frame of the building according to the present invention.

[Explanation of symbols]

1 ... building frame, 2 ... foundation beam, 3a, 3b ... 1st floor beam,
4 ... Beam on the second floor, 5 ... Pillar on the first floor underground, 6 ... Pillar on the first floor above ground,
7: floor slab on the first floor, 8: floor slab on the second floor, 9: retaining wall.

Claims (1)

(57) [Claims] 1. A structural frame of a building having one or two stories above the ground with a basement floor, a pillar on the first basement floor constituting the structural frame, and a pillar built on the pillar. The beam on the floor and the pillar on the first floor are constructed by reinforced concrete, the beam on the top floor constructed at the upper end of the pillar is constructed by steel frame material, and the joint between the beam and the pillar on the first floor is pin-joined. A structural frame of a building, characterized in that: