JPS6062354A - Construction of synthetic earthquake-proof wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The resistance 1. ', l￥ Walls and other shear walls of buildings, especially wall formwork Af<47.
ff A new and useful composite shear wall constructed of a structurally integrated composite shear wall of copper plates and cast-in-place unreinforced concrete 1111 ('14) It is.

Generally, when building reinforced concrete or steel reinforced concrete shear walls by pouring concrete on-site,
It goes without saying that wall formwork is required as a temporary material, but WUj in the vertical and horizontal directions is 1! ! ll! For reasons of construction, formwork work by carpenters and reinforcement work by reinforcing bar workers are carried out at the same time, so it is difficult to avoid the complexity of the work.
In addition, it is difficult to save labor since it is necessary to dismantle and remove the formwork after the concrete has hardened.

In addition, for shear walls of multi-story buildings using prefabricated construction methods such as the H-PC construction method, precast concrete slabs with built-in steel frame braces are suspended between column steel frames that are erected at predetermined intervals. It is constructed by joining steel frames and precast concrete slabs and pouring concrete on-site at the joints, which greatly eliminates on-site work such as formwork work, reinforcing work, and concrete pouring. However, due to this, the precast concrete slab for the shear wall becomes quite heavy and bulky (1.
Sending IOI requires a great deal of effort and expense.

The method for constructing a synthetic shear wall according to the present invention solves the above-mentioned problems of the conventional method, and is a synthetic seismic wall constructed of steel plates and unreinforced concrete that also serves as wall formwork and structure, and has excellent fire resistance and sound insulation properties. The wall is made by connecting multiple steel plates with many protrusions to ensure adhesion to the concrete (at least on one side); A large panel is constructed, and two large panels are arranged between the pillar steel frames in a row with the protrusions, and are held at a constant interval from each other, and the ends of each large panel are Built with bolts connected to the steel columns on both sides,
After placing the column main reinforcement and hoop reinforcement, and at the same time placing the column concrete, the empty holes J formed between the one large panel.
Concrete is poured without wall reinforcement in part A,
It is characterized by constructing a synthetic earthquake-resistant wall that is structurally integrated with large panels on both sides and unreinforced concrete poured in the void.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 8 show a rigid frame structure in which the girder direction is SRC column A made of cast-in-place concrete and girder B made of precast concrete SRC structure, S structure, etc., and the direction of the girder is steel plate 1 and Unreinforced concrete by pouring 2
This figure shows part of a multi-story building such as an apartment complex, which has a shear wall structure consisting of a composite shear wall C with a composite shear wall C, and a boundary wall made up of the composite shear wall C.

The steel plate 1 is produced in a factory and is shown in FIGS. 4 to 6.
As shown in the figure, the front and back surfaces are shaped by press working, etc. so that protrusions a that are continuous in a zigzag pattern and grooves that are continuous in a zigzag pattern are located alternately on both sides to ensure adhesion to the concrete 2. It is now possible to do so. The top surface of the protrusion a and the bottom surface of the groove part A are flat, and a slope C is formed between them. Further, a large number of shear connectors 6 for floor concrete, etc. are protruded from the upper and lower sides of the steel plate 1. These shear connectors 3 are constructed by hot-welding short deformed steel rods or round steel rods to one side of the steel plate 1. Reference numeral 4 denotes a tongue piece for temporary use during erection, which protrudes from one side of the steel plate 1.

The construction method of the synthetic shear wall C is as follows.

After carrying the required number of steel plates 1 to the site, as shown in Fig. 7, the two steel plates 1 are connected with a steel backing plate 5 and a port nut 6, and the wall formwork front H; Large spring for /l/7
Configure.

Next, place one large spring/L/7 between the pillar steel frames 8, with the back surfaces of each large spring/I/7 facing each other 4.1 times, and the 8th
As shown in the figure, seven sheets are stacked at a time with separators 9 holding them at regular intervals.

At the end of each large panel 7, the temporary tongue piece 4 is connected to the pillar steel frame 8.
The gusset plate 1-104 is fixed to the column steel frame 8 by connecting it with bolts and nuts 11 welded to the gusset plate 1-104.

After that, the main column reinforcements 12 and hoop reinforcements 16 were arranged on the floor where the large panel 7 described in Fr1I was built, and the column formwork (not shown) was assembled. At the same time, the column concrete 14 was poured. Spring) Gap S formed between L/7
Concrete 2 will be poured. This concrete 2 is
It is installed without wall reinforcement.

When the concrete 2 is hardened, a composite shear wall C is constructed in which the large panels 7 on both sides and the unreinforced concrete 2 are structurally integrated by the adhesion force of the concrete between the protrusion a and the groove. It will be done.

In this example, the floor slab is constructed by pouring concrete on-site, and specifically, the large spring/
Following the construction of I/7, the upper floor floor form (not shown) was assembled, slab reinforcement 15 was placed, and floor concrete 16 was cast at the same time as the concrete 2. .

9 to 11 show another embodiment, in which each steel plate 1 is
The upper side portion 1a is bent outward in the wall thickness direction,
The upper end of the gap S formed between the large spring/L/7 is 1
It is characterized by its widening and tapered shape, which makes it easier to place concrete into the void S and improves the strength of the upper part of the synthetic seismic WC. In addition, the gutter plate 1 that connects the temporary tongue piece 4 on the upper side of the large spring p7
0 is formed in a substantially V-shape as shown in the figure. The other configurations are the same as in the previous embodiment.

As the steel plate 1, in addition to having a five-speed zigzag protrusion a and a groove part, the force generated by welding countless stud bolts to one side of a flat steel plate, or a mesh sufficiently larger than the diameter of concrete coarse aggregate. It is possible to use a stud bolt or an expanded metal that has a protrusion that secures adhesion to concrete by bath-welding it with expanded metal.

Since the method for constructing a composite 1 earthquake-resistant wall according to the present invention has the above-described configuration, various effects as described below can be obtained.

■ The large steel panels that serve as wall formwork and structure on both sides, and the unreinforced concrete that has been cast and hardened in the gap between the large panels, are structurally stabilized due to the concrete adhesion of the protrusions of the steel plates. In other words, steel plates with high strength against tensile and shear forces are used as the wall formwork during concrete pouring, and after the concrete has hardened, the composite shear walls are constructed integrally with the outside of the concrete wall. Since it is used as a reinforced steel reinforcement, there is no need to dismantle and dismantle wall reinforcement or formwork, which is required in conventional construction methods in which reinforcing wall reinforcements are buried inside concrete, which greatly reduces construction work.

■ Concrete is poured on site, and steel plates are connected on site to form large panels, making it easier to transport materials to the site compared to precast concrete slabs.

■ Fireproof structure. In other words, since the concrete is covered with a steel plate, which is a non-combustible material and has a high melting point, the fire resistance of the concrete wall can be expected, and furthermore, the concrete is sufficiently restrained by the steel plate, so there is no decrease in proof strength.
Fireproof coating on the steel plate surface is not required.

■ Because it uses concrete, it provides the same sound insulation properties as conventional RC shear walls. In particular, as in the examples,
By using a steel plate that has protrusions and grooves on both the front and back sides, sound attenuation due to diffused reflection can be expected.

■ The joints between synthetic shear walls and columns and floors can be easily and reliably integrated by pouring concrete on-site, and there is no need for on-site welding.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the method for constructing a composite if+it 7jr4 wall according to the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a cross-sectional plan view of the main part, and Fig. 3 is a longitudinal cross-sectional side view of the main part. figure,
Figure 4 is a steel plate shield, 111i8 front view, Figure 5 is an enlarged view of the main part of Figure 4, Figure 6 is a sectional view taken along line 1'1-■ in Figure 5,
FIG. 7 is a cross-sectional plan view showing the connecting portion between the steel plates, and FIG. 8 is a partially cutaway side view of the main part in a state where the large spring 7 is installed. 9 to 11 show another embodiment of the present invention, FIG. 9 is a partially cutaway front view, FIG. 10 is a longitudinal side view of the main part, and FIG. 11 is a schematic perspective view of the main part. be. A...SRC column, C...Synthetic shear wall, S...
・Gap, a... protrusion, b-, -groove, 1...
Steel plate, 2... Concrete, 3... Shear connector, 4... Temporary tongue piece, 7... Large spring,
8...Column steel frame, 10 River gusset plate, 12...
Column main reinforcement, 1 hoop reinforcement. Figure 3 Figure 5 Figure 6 Figure 10 Figure 11

Claims (1)

[Claims] ■ A large panel for wall formwork and structure is constructed by connecting a plurality of steel plates each having a large number of protrusions formed on at least one side to ensure adhesion with concrete, one large panel in between, the surfaces with the protrusions facing each other, and
They are maintained at a constant distance from each other, and the ends of each large panel are connected to the steel columns on both sides.
After placing reinforcement for the main columns and hoop reinforcements, concrete for the columns is poured and at the same time, concrete is poured into the gap formed between the large panels without wall reinforcement, and the large panels on both sides and the A method for constructing a synthetic shear wall, characterized by constructing a synthetic shear wall that is structurally integrated with unreinforced concrete cast in a void. High mll hard work envy 1 Kofumen SR Geme → Thorn piece T
The method according to claim 0, characterized in that a steel plate is used which is shaped so that continuous protrusions and four continuous parts in a zigzag pattern are alternately located. (2) The upper side of the steel plate is bent outward in the thickness direction, and the northern end of the gap is widened by 1 and tapered.
The method described in section. ■ The steel plate has a large number of shear connectors for floor concrete on its upper and lower sides.
as stated in any of the paragraphs.