JPS6346812B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a construction method for constructing earthquake-resistant buildings using square steel pipes and ALC plates.

In general, ALC versions are being used in many buildings these days because they are lightweight and have good sound insulation and heat insulation performance.

By the way, in the conventional construction method using ALC plates, the wall surface is constructed by welding anchor bolts buried in the ALC plates or fittings welded to them to columns and beams made of H-beam steel, etc. The ALC plates are installed continuously on the outside of the wall frame, the joints are filled with mortar, and the floor and roof surfaces are maintained with horizontal braces to maintain the rigidity of the floor. ,
Commonly, construction is carried out by arranging reinforcing bars within the joints and filling them with mortar.

Therefore, according to such conventional construction methods, when a strong horizontal force is applied during a strong earthquake or typhoon, the wall slab cannot follow the displacement between the floors of the rigid frame structure.
Local stress concentration occurs in the anchor bolts of the ALC plate or their welded parts, causing accidents such as this part breaking and falling off, or local deformation of the H-shaped steel beam flange causing the deck to break. It was dangerous.

On the other hand, recently, as a solution to this problem, the upper and lower ALC plates are made into expansion joints by using lightning metal fittings and back-up materials for side joints, as a ``construction method that requires consideration for displacement between steel structure layers.'' Construction methods have been adopted, but there have been drawbacks such as the need for complex work such as lightning hardware and expansion joints.

In order to solve the problems of the conventional construction method, this invention can be easily constructed without requiring any complicated parts or work such as various joint hardware, expansion joints, etc., and the rigid frame structure is sufficient even during strong earthquakes. For walls, it maintains a strong bearing capacity and resists interlayer displacement.
The ALC plate for the floor can sufficiently follow the ALC plate to prevent it from breaking or falling off, and also secures sufficient rigidity without requiring horizontal braces on the floor surface.
We propose an easy and economical construction method that prevents the destruction of the plates.

The present invention will be explained below with reference to the drawings. Pillars 1 and beams 2 made of square steel are rigidly connected at joints, a rigid frame frame of a required level is constructed, and this is fixed on a foundation 3.

For example, as shown in FIGS. 3 to 5, the rigid connection means for the joint portions of the pillar 1 and the beam 2 may be formed by forming a tapered shape upwardly at the joint portion of the column 1, and inwardly dovetailing the left and right sides. Weld the receiving plate 4 which has been chamfered to the shape,
A reinforcing plate 5 is welded at right angles to the lower end of the beam 2, and a joining plate 7 having a notch 6 into which the receiving plate 4 can be tightly fitted is welded to the joint end of the beam 2.
A reinforcing plate 8 is welded to the upper surface of the end, and in this state, the joining plate 7 of the beam 2 is fitted into the receiving plate 4 of the established column 1 at its notch 6 and temporarily fixed, and the joining plate 7 and While welding the joint between the reinforcing plate 8 and the column 1, the reinforcing plate 5
and beam 2 are welded together. In this case, when the beam 2 is installed opposite to the column 1, the reinforcing plate 5 is continuously integrated into the column 1.
Furthermore, a reinforcing plate 9 is welded inside the column 1 to which the reinforcing plate 8 of the beam 2 is butt-welded. Furthermore, for the column 1, a column supplementary material 10 made of a square steel pipe is installed as necessary.
Weld and reinforce column 1.

After constructing the rigid frame structure in this way, multiple walls are installed in the wall frame composed of the adjacent columns 1, 1 and the upper and lower beams 2, 2 passed between them.
Continuously build ALC version 11, each ALC version 1
1. Connect each other and the inner surface of the wall frame with a permanent adhesive 12 (for example, a butyl rubber adhesive under the trade name TOP SEALER, which remains soft and rubber-like permanently after curing and has excellent elasticity and plastic deformability) Crimp and fix.

In addition, the four circumferential beams 2 that make up the floor frame are
A supporting member 13 made of angle steel or the like is fixed in advance by welding or riveting to the side surface corresponding to the inner circumferential surface of the floor frame, and a plurality of floor ALC plates 14 are sequentially and consecutively placed inside this floor frame. The ends of each ALC plate 14 are supported by the supporting material 13 and laid out. Then, the joints between the ALC plates 14 and the gaps between them and the inner surface of the floor frame are filled with mortar 15 to integrate the floor frame and each ALC plate 14.

As described above, according to this invention, since the ALC plate is built integrally within a wall frame made up of columns and beams made of square steel pipes with joints rigidly connected, the structure is protected against earthquakes and typhoons. The amount of inter-story displacement caused by the horizontal force applied to the building is divided into each floor, and as in conventional construction methods, the ALC version of each floor is continuous to the upper and lower floors, and the amount of inter-story displacement increases in proportion to the height of the building. There is no such thing.

Since the ALC plate is fixed with permanent adhesive at the mutual joints and the joints with the wall frame, even if the wall frame undergoes significant interlayer displacement due to strong earthquakes, typhoons, etc. It is possible to easily follow the interlayer displacement by causing warping at the joints between each ALC plate and the wall frame, and since the shear force acts on the entire joint surface of the ALC plate, no local stress is generated. In addition, the rigidity of the ALC plate combined with the rigidity of the wall frame allows it to resist horizontal forces.

In addition, for the floor and roof, the ALC plates are placed into a floor frame consisting of beams made of square steel pipes around the four sides, and the ends are supported on the inner support material and laid out in a continuous manner. Since the joints and the gaps between these and the floor frame are filled with mortar to integrate the two in the same plane, it is possible to ensure the necessary and sufficient floor steel properties without the need for horizontal braces.

Furthermore, the pillars and beams are made of square steel pipes, so they are highly rigid and have a good finished appearance. In addition, since there is no need for any metal fittings or welding when installing the ALC plate, there is no special pre-processing or work that requires skill, making it extremely easy to install and economical.

Therefore, according to the present invention, it is possible to reliably prevent the ALC plate from being damaged or falling off in the event of a strong earthquake with simple construction, and it is possible to construct a building with superior earthquake resistance.

Experimental example 1 Column length 230 cm using square steel pipes of 150 x 100 x 4.5 mm.
A wall frame with a beam length of 360 cm was constructed, and ALC plates with a thickness of 100 mm were continuously placed inside the frame and fixed with a permanent adhesive (Top Sealer 5000#) to form an integrated experimental panel. was placed on rollers laid out on the floor, one end of the column base was fixed, and a load P was applied to the column head.
= 230/100 when experimented with interlayer displacement of 7.7cm
At the time of displacement, a hair crack of about 6 cm was generated near the fixed hardware of the sash installed in the wall, and as the amount of displacement increased, cracks appeared in various places on the ALC plate surface, but when external force was applied to the wall surface at 230/30 displacement. I tried to get it to fall off, but it didn't fall off.

The load for the 230/100 interstory displacement is 3.24t in the design value, but it was 4.4t in the experiment, and this difference is thought to be due to the effect of the ALC version.

Experimental example 2 180×360cm using 150×100×4.5mm square steel pipe
A 100 mm thick ALC plate was dropped into the floor frame as in the above example, and joint mortar was filled to form an integrated experimental panel, which was placed on rollers laid out on the floor. When the magnet was installed and tested by fixing one end of the longitudinal magnet and applying a load P to the other end, a deformation of 5.71cm occurred when the load reached 6.0t, and no damage to the frame was visible. Considerable damage occurred to the ALC plate.

Note that in order to cause a displacement of 5.7 cm with the floor frame alone, a calculated load of 1.06 t would be applied, and the difference between this and the experimental value of 4.94 t is considered to be the effect of integrating the ALC plate. By the way, this difference
Assuming that a force of 4.94t is supported by a horizontal brace, it is calculated to be equivalent to installing a horizontal brace of approximately 25φ (4.91cm ² ).

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing an example of a building constructed using this invention construction method, Figure 2 is a cross-sectional view of the same, Figure 3 is a perspective view of the column and beam joints, and Figure 4 is a cross-sectional view of the pillar and beam joints. FIG. 5 is a longitudinal cross-sectional view showing the bonded state, and FIG. 5 is a cross-sectional view of the same. 1...Column, 2...Beam, 11...ALC version for wall,
12... Permanent adhesive, 13... Supporting material, 14
...ALC version for floors, 15...mortar.

Claims (1)

[Claims] 1 Columns and beams made of square steel pipes are rigidly connected together at their joints to form a rigid frame structure, and a plurality of columns are installed in a wall frame composed of adjacent columns and upper and lower beams in this rigid frame frame. The ALC plates are erected in succession, and the joint surfaces of these ALC plates and the inner surface of the wall frame are bonded and integrated with a permanent adhesive, and supported on the inner surface of the floor frame composed of four circumferential beams. A supporting material is fixed, and a plurality of ALC plates are successively dropped into this floor frame, and their ends are supported on the supporting material.
A construction method using square steel pipes and ALC plates, characterized by filling the joints between the plates and the gaps between them and the floor frame with mortar to integrate them.