JPS58164866A - Continuous layer earthquake-proof wall by h-pc construction method - 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 invention is based on the A-PC construction method, in which there are braces between the pillar steel frames built at predetermined intervals, two on each floor, face-to-face. In general, tI-PC! relates to a multi-layer shear wall constructed by arranging these PCC walls and integrally connecting the PCC walls and the PC wall plates and column steel frames. The multi-layer shear wall in construction method 2 uses PC wall panels with built-in steel strips.

In terms of structural strength, only steel strips embedded in concrete are considered as braced frames, and concrete is considered as a member that prevents the steel strips from buckling.

In addition, on the structural needles, a shear burst stress stress design is carried out in which only the steel strips resist shear forces.

However, when assuming the ultimate strength of a structure, what about each layer? In addition to shear design, it is desirable to consider the failure mode of the entire structure. In other words, in high-rise and super-high-rise buildings, to prevent shear failure from occurring on lower floors,
It is desirable to increase the shear strength and design the bending fracture J1 element. In addition, 1. Of course, there are also concerns regarding ease of construction, especially how the connection work between the PCC walls and the column steel frame can be simplified, and the surroundings of post-cast concrete at the connection points.
In particular, the VC of the column and beam joints? Emphasis must also be placed on how to improve the surroundings of post-cast concrete.

From this point of view, if we consider the entire structure of steel band and plate braces built into conventional multi-story shear walls, there are many problems in the following points.

That is, in the conventional multilayer a-resistant wall, M as shown in FIG.
(Each PC wall plate has V-shaped braces 8... and beam steel frames 9 built-in), and V-shaped braces as shown in Figure 2. A nine-bracing structure is created by combining the and inverted V-shape (each PC wall board has built-in X-shaped braces 3... and a beam steel frame 9), and Figure 8. M as shown in
A type of brace that uses both a letter-shaped brace and an M-shaped brace so that they are alternately located on the first floor ν (two types of PC wall wall board Tsuma-sho, V-shaped brace 8... cross-beam steel frame) The PCC original plate 2a with a built-in number 9, an inverted V-shaped sentry plate 18', and a PC wall plate b with a built-in liang chichi v#9 were adopted.

In the brace configuration shown in Fig. 1, all PC wall panels 1 have the same structure and are easy to construct, but since there is no continuity in the braces on the upper and lower floors (i.e., (because the difference is not continuous in a straight line), there is an irrational assumption regarding the transmission of shear force. In addition, the strut form 2 shown in Figure 2 and Figure 8 is reasonable in that there is continuity between the striations 1 on the upper and lower floors, but PCC
Connection work between walls - P P It was difficult to connect the Ok14 version and the steel frame l, and there were problems with workability. That is,
In the case of Fig. 2, there are connection points Vcν of four PC memory plates 2 adjacent to each other vertically and horizontally, and four members (that is, left and right PC wall plates, braces 8 in 2, etc.) Butt welding the connecting ends of the beam steel frames 9, as well as the lower ends of the left and right braces 8 in 2, the PC wall panels on the upper floor,
They must be connected accurately and concentrically by means such as bolt tightening, and even at the connection point between the PC wall plate and the column steel frame l, the lower end of the brace of the PC wall plate on the upper floor, the upper Connecting end of beam steel frame 9 and reinforcement I bolt 8 on PC wall plate of floor 2, column steel frame 1
Eight members are connected, and it is difficult to align these members, resulting in poor workability. In the case of Figure 8, 2
Alternately pound the PCC original plate 2a2b of cypress wood one floor at a time.
Softwood-1 to go! Not only is it troublesome, but
PCC original plate 2a on the floor that lacks economy and has M-shaped braces 8... (i.e., V-shaped braces 8...
2 at the connection point with the PC wall wall plate b of the floor with Even if it is
Eight members are connected at one time, and the workability is quite poor.

Furthermore, in both the strut forms shown in Figures 1 and 2.8, P
(Since the connection between the 3rd wall slab and the column steel frame l is done at the column and beam joint where the reinforcing bars radiate the most, it is difficult to work.
, and for the five gusset plates and stiffeners provided on the column steel frame 1, joint plates on the PCC wall side, etc.
The problem was that the joints between the columns and beams became more complicated, making it difficult for the post-cast concrete to cover.

The present invention is based on the following: When the upper, lower, left, and right PC walls are connected, shearing force can be transmitted rationally in a frame in which the braces are continuous, and the entire frame can be assembled into one piece with the foundation as the fixed end. When analyzed using a truss model assuming that the beam is a supported beam, no stress acts on the beam steel except for the top floor. With the aim of making it possible to design a structure in which bending failure precedes shear failure, we omitted the beam steel and devised the arrangement of the braces, thereby improving the conventional structure. Continuous layer resistance ii
I wrote a couple of notes on the wall. It's something that eliminates Nagisa's flaws.

In order to achieve the above object, the present invention provides a dream-shaped VC connection-QNFC connection between the center where the connection ends are drawn to both L-edges of the wall board, and the center where the connection ends are drawn to both the left and right edges. One of the PC wall panels was installed on a road where the steel beams were not embedded in the upper part of the wall panels, and between the steel columns built at predetermined intervals, there were several floors of '41. Two PC wall panels are arranged in a row on each floor, and the connecting ends, r(, Connect the connecting ends in contact with each of the pillar steel frames, respectively, and on the top floor, connect the top floor PC wall plate Cl!
All of the materials were erected between the steel frames of the pillars.

According to the above configuration, P adjacent in the vertical and horizontal directions
The connection between CC walls and the connection between the column steel frame and PC wall plate are all two-member connections, which makes alignment easy and makes it easy to connect PCC walls.
Since the connection of the PC wall plate to the column steel frame is performed at a position away from the joint part of the column and beam, that is, at a midway point between the upper and lower floor heights, coupled with the fact that it is only necessary to connect the VC2 members as described above, the column It is extremely easy to connect the PC wall plate to the steel frame, and it also makes it easier to cover the cast-in-place concrete at the joint.

In addition, PC wall panels may all have the same structure; for example, even if the PC wall panels and beam steel beams on the top floor are buried, different types of PC wall panels may be used. Final I - Only 92 pieces of shear wall panels are required, and compared to laminating two types of PC wall panels 5'□ each other, material management is easier, and pottability is improved.
Excellent economy.

As a result of these, we have developed a multi-layered shear wall with a bending and fracture-first type.
Embodiments of the present invention, which can be easily and economically realized, will be described with reference to the drawings.

Figure 4 shows a two-story shear wall A in a building constructed using the ■-PC construction method according to the present invention. The two PC fugami plates 2.2 are placed side by side in a shape, and the adjacent ends of the braces 8 buried in the POj41 plates 2 are connected to each other, and the pillar steel frame l and the braces 8 adjacent thereto are connected to each other. The ends are connected to each other, and finally, the horizontal force transmission material 4 and the braces 8 of the adjacent PC wall plate are connected by a series of steel frames connected over the upper end sides of the column steel frames 1 and 1. PC! Concrete is cast on-site on the same columns and slabs to form a multi-layer shear wall system that is prone to bending failure.

As shown in FIG. @6
It is embedded in the concrete wall plate 6 in the middle position in the left and right direction of a and in the middle position in the vertical direction between both the left and right edges 6b, protruding from the can edges 6a and 6b, and the upper part has a beam steel frame and main beam reinforcement. is not buried. And the day before, the pillar steel frame 11
A gusset plate 7 is provided at a position between the upper and lower sides of each floor and corresponds to the joint plate 5 of the PC wall plate, and a gusset plate 8 is also provided at one place corresponding to the horizontal force transmitting member 4. is provided.

Reinforcements 8... may be made of steel frame supports, shaped steel, or other types of reinforcements (see Figure 5). Force transmission material 4 is PC
If the PC wall panels are manufactured separately from the wall panels, all the PC wall panels have the same structure, but as shown in Figure 6, only the top floor PC wall panel' has a beam iron of 1t9 tons. - It can also be used with a rhombus-shaped diagonal 8... buried in a connected state. In this case, the horizontal force transmission member 4 between the column steel frames 1 and 1 is constructed by connecting the adjacent ends of the beam steel frames 9 and 9 to each other.

In addition, in the above embodiment, the PC wall plate... is formed to have a uniform thickness over the entire length of the wall plate.
I really don't like it. It is also possible to use a PC wall plate δ that is integrally molded with a concrete beam shape. In addition, P
In the case of C wall wall plate..., reinforcing bars may be buried in a structural rc structure to restrain the beam-shaped concrete and to propagate long-term floor support to the columns and walls.

[Brief explanation of the drawing]

Figures 1 to 8 are explanatory diagrams of the structure of a conventional multi-layer shoulder wall, and Figures 4 and subsequent figures show embodiments of the present invention. FIG. 5 is an enlarged front view of the main part with a part cut away, and FIG. 6 is an enlarged front view of the main part with a part cut away showing another embodiment. ■...Column steel frame, 2...PC wall wall plate 8...bracing, 4
...Horizontal force transmission material. l゛1... Shoe"1 ^1X Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] ■ Rhomboid-shaped connected braces are buried with their connecting ends located at the center of the upper and lower edges of the wall board and at the center of 4Vce on both the left and right sides, and A precast concrete wall plate without a steel beam embedded in the upper wall part of the plate,
Two rhombus-shaped braces are placed flush across multiple floors and on each floor between the pillar steel frames placed at a predetermined interval, and the vertical direction of the two diamond-shaped braces on these precast concrete wall plates is 1 part of the bonds adjacent to each other in the left and right direction, and the above-mentioned column steel frame and the connecting end part adjacent to it are connected, respectively, and on the top floor 2, the diamonds embedded in the top floor D precast concrete wall plate are connected. A horizontal force transmitting material connected to shaped braces is installed between the steel columns. The precast concrete wall plate is characterized by having diamond-shaped braces and steel beams buried therein, and adjacent ends of these steel beams being connected to each other to form the horizontal force transmission material. A multi-story S-wall of a building manufactured by the EI-PC construction method according to claim 0. ■ The precast concrete wall plate on the top floor has the same structure as the precast concrete wall plate on the lower floor, and the horizontal force transmitting material is manufactured separately from the pre-geast concrete wall plate on the top floor, and is constructed between the steel columns along the top of the wall plate O. A multi-layered wall of a building constructed using the d-PC construction method described in .