JPS6160949B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a PC version shear wall with built-in braces.

In the beam-to-beam direction of a steel frame building, if a PC shear wall is erected between the girders and the concrete wall slab is directly jointed to the steel girder, equipment such as ducts should be installed on the underside of the girder. It is necessary to provide a separate space, and passages and entrances are provided by forming openings in the concrete wall slab.

When constructing a PC shear wall, the PC shear wall itself can secure the space necessary for installing ducts, etc., without having to specifically provide the above-mentioned equipment space. By constructing the PC shear wall, a space can be provided on both sides of the concrete wall slab, and the PC shear wall is also equipped with an inverted V-shaped brace that is also effective as an earthquake resistance element. be.

The present invention for this purpose includes a concrete wall slab in which a steel plate of a required width is built in as a brace in an inverted V shape from the center of the upper side to both ends of the lower side, and each end of the brace is made to protrude, and the concrete It consists of a steel beam that is longer than the width of the wall slab, protrudes to the side of the wall slab on both sides, and is attached to the central end of the brace. The main idea is to provide a concave portion between the beam material and the beam material to form a space for equipment such as a duct, and to form a space below the protrusion of the beam material as a necessary space for a passage or the like.

The present invention will be explained in detail below using illustrated examples.

Figure 1 is an explanatory diagram of the precast concrete wall slab part of the PC version shear wall of the present invention, in which 1 is the concrete wall slab, and a recess 2 formed in the center of the upper side.
Brace 3 is built in on both sides of the bottom side. This brace 3 is made of steel plates 3a, 3a of the required width bonded together in a V shape and buried in an inverted V shape.
In addition, each end portion 3b, 3c, 3c protrudes from the wall slab so that it can be directly attached to a steel beam by bolts or welding.

Reference numeral 4 denotes a recess for equipment formed at the upper corner of the concrete wall slab 1, which is formed by notching the concrete wall on one side of the upper side in an L shape when the concrete wall slab 1 is formed. FIG. 2 shows a case where the recesses 4 are formed at both upper corners.

FIG. 3 shows an embodiment of the PC version shear wall of the present invention, in which the center of a steel beam 5a that will become the girder 5 is attached to the center end 3b of the brace 3 with bolts and nuts, and the concrete It is formed by connecting the wall slab 1 and the beam material 5a. In this case, since both sides of the concrete wall slab 1 are used for passages, etc., the beam 5a is longer than the width of the concrete wall slab 1, and the lower side of the beam protruding from both sides of the concrete wall slab 1 is used as a space. Let it be.

Next, as shown in FIG.
A and the pillars 6, 6 are jointed to make the beam material 5a the upper beam 5. Also, the ends 3 on both sides of the brace 3
c and 3c are connected to the lower girder 5 by welding or using high-strength bolts. As a result, a part of the girder 5 protrudes as an arm l between each connection point created by the connection between the ends 3c, 3c on both sides and the girder 5 and the connection point of the column and girder. ,
A space 7 serving as a passage or an entrance is created under the beam between the concrete wall slab 1 and the column 6. Furthermore, an equipment space is formed above the space 7 by the recess 4 and the beam 5a, and equipment such as the duct 8 can be constructed below the girder.

Further, in FIG. 4, when a horizontal force is applied to the frame of the girder 5 and the columns 6, the external force is transmitted from the lower girder 5 to the column 6 as the axial force of the brace 3, and in response to the axial force, the girder 5 The arm 1 acts as a bending spring material, and the concrete wall slab 1 acts as a shearing spring material, giving great flexibility to the frame and fully fulfilling its function as an earthquake-resistant element of the PC shear wall.

As mentioned above, this invention has a steel plate 3a of a required width,
3a is built in as a brace 3 in an inverted V shape from the center of the upper side to both ends of the lower side, and each end of the brace 3b, 3c, 3c protrudes. It consists of a steel beam 5a that is longer than the width of the concrete wall slab 1 and is attached to the central end 3b of the brace 3 with both sides protruding on both sides of the wall slab. A recess 4 is provided between the beam 5a to form a facility space such as a duct, and the lower side of the projection of the beam 5a serves as a necessary space 7 for a passage, etc., so the brace can be jointed directly to the girder. Even though it is installed as a stand, there is an equipment space under the girder, so there is no need to provide a special equipment space like in the past. In addition, the horizontal force is transmitted through the braces, and the junction between the braces and the girder is inside the junction between the columns and beams, so the triangular shape of the braces and flexibility can be imparted to the frame. Even with PC shear walls used in the beam-to-beam direction, there is no need to provide openings for passages, entrances, etc. in the concrete wall slab. In addition, by increasing the precision of the recess without losing flexibility in the placement of ducts installed under the girder, the recess can be used as a construction standard for equipment such as ducts, shortening equipment construction and saving labor. It has features such as being able to achieve

[Brief explanation of the drawing]

The drawings illustrate the PC version shear wall according to the present invention. Figures 1 and 2 are front views of the concrete wall version, Figure 3 is a front view of the PC version shear wall, and Figure 4 shows the construction state. FIG. 1... Concrete wall slab, 3... Brace, 3
a... steel plate, 3b, 3c... end of steel plate, 4...
Recess for equipment, 5... Large beam, 5a... Steel beam material, 6... Column, 7... Space, 8... Duct.

Claims (1)

[Claims] 1 A concrete wall slab with a steel plate of the required width built in as a brace in an inverted V shape from the center of the upper side to both ends of the lower side, with each end of the brace protruding from the width of the concrete wall slab. It is also long and consists of a steel beam that protrudes to the side of the wall slab on both sides and is attached to the central end of the brace, and a duct is installed between the beam and the upper corner of the concrete wall slab. A recess is provided to form an equipment space such as, and the lower side of the projection of the beam serves as a necessary space for a passage or the like.
PC version of earthquake-resistant wall.