JPS6164939A - building frame - 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 (Industrial Application Field) The present invention relates to a building frame having a composite outer wall consisting of a PC board and a concrete wall provided on the inner surface of the PC board.

(Prior art) Generally, cracks cannot be avoided in the framework of reinforced concrete buildings, but one of the causes of cracks that occur in concrete exterior walls is drying shrinkage of wall concrete and shaft members (columns, beams). There is a difference between the drying shrinkage of concrete, and the former is larger than the latter, so the drying shrinkage strain of the wall concrete is hooked to the shaft material. In the shrinkage state of the wall, in the vertical direction, it becomes compressive due to natural N, etc., and the tensile stress due to the difference in drying shrinkage is canceled, or in the horizontal direction, this tensile stress is the same. Cracks occur in the vertical direction.

By the way, so-called synthetic exterior walls have been proposed in the past in order to improve the construction efficiency of exterior walls in reinforced concrete building frames, such as that disclosed in Japanese Patent Publication No. 31293/1983. For the exterior wall of this example, a PC board is placed on the outside of the building frame, a reinforced concrete wall made of cast-in-place concrete is provided inside the PC board, and the PC board and wall are connected using PC boards.
It is integrated through an inverted V-shaped reinforcing bar that protrudes from the surface of the C plate.

(Problem to be Solved by the Invention) However, in the upper outer wall, the horizontal tensile force due to drying shrinkage of the wall concrete propagates to the PC board.
Vertical cracks occur in the PC board, leading to water leakage, reducing the durability of the exterior walls, and damaging the exterior appearance of the building frame.

(Means for Solving the Problems) The building frame 1 of the present invention has a PC board 2 located on the outer surface of the frame.
It has a synthetic outer wall consisting of a concrete IJ and a wall body 3 provided inside this PC board, and the inner surface 11C of the PC board has ribs 2.
a is protruding, and this rib is provided horizontally over the entire width of the PC board, and the PC board and the concrete wall are connected by a connecting body 5, and the PC board At the joint between the concrete IJ and the concrete wall, there is a concrete IJ-JP single-piece crack.
This is mediated by Moxibustion Experience 4. The connecting body 5 projects from the inner surface of the PC board 2 and can follow the horizontal movement of the concrete wall 3.

(Function) Cracks and deformation occurring in the concrete wall 3 are caused by the presence of the horizontally long ribs 2a and the insulating film 4, causing the PC board 2
does not propagate directly, and during earthquakes or due to temperature changes,
Even if the reconcrete wall slides in the horizontal direction, the PC board is not affected by it via the connecting body 5.

(Example) An embodiment of the present invention will be explained below based on the drawings.

In FIG. 1, a building frame 1 is constructed of reinforced concrete, and its outer wall is a composite outer wall with a PC board 2 on the outside and a reinforced concrete wall 3 of a predetermined thickness disposed on the inner surface of the PC board.

The PC board 2 can be made of glass, carbon fiber, or glass.
It is constructed of strong concrete made of clay and other materials.

The inner surface of the PC board 2 has ribs 2a as shown in Fig. 2.3.
is provided horizontally and over the entire width, and the ribs are PC
4 in total, 2 in the middle of the board and 1 in both the top and bottom edges.
Books are missing at equal intervals. The opposite side surface of each rib 2a is a tapered surface that slopes toward the space between the ribs.

The spacing between the ribs 2a is determined to ensure that the PC board 2 will not be deformed by the lateral pressure during concrete pouring of the concrete wall 3, and that the PC board will not warp convexly toward the outside of the building frame after the building has been completed. shall be determined. The entire inner surface of the PC board 2 is covered with a slat 4 which is an insulating film. This Surinobunto prevents the adhesion of the concrete part of the concrete wall 3 and cast-in-place iron ηf1 concrete beam 8 to the PC board 2, and although it can withstand the compression of the concrete wall to some extent, the wall cock' This property is responsible for preventing the drying shrinkage of the J-t from directly propagating to the PC board.

The reinforced concrete wall 3 is in contact with the inner surface of the PC board 2 and is connected by the rib 2a, and is fixed vertically due to the presence of the rib, but can slide horizontally along the rib, and is connected to the PC board. They are connected by connecting bolts 5 that form the body.

These connecting bolts have their base ends embedded in the ribs 2a of the PC board in advance and their tips protruding from the PCC board surface.After the concrete wall 3 is constructed, the PC board and the wall are connected. connect,
It will function as a center during construction. As shown in FIG. 3, a comb-shaped body 6 is attached to the base of the PC board of the connecting bolt 5 on the 1 knob 2a side, and the connecting bolt 'fz
The horizontal sliding of the concrete wall 3 can be followed by the relative relationship with the wall (...2). There is a beam rib 9 in the 28
Reinforcements are arranged in each area, and slab reinforcements 11 are arranged in the cast-in-place concrete slab 10. Next, construction will be explained.

When constructing the frame 1, the outer walls, beams 8, and slabs 10 are constructed layer by layer. First, the PC board 2 is installed in a predetermined position, and the wall reinforcements 7 and beam reinforcements 9 are installed at the same time or after installation.
After that, assemble the inner wall formwork completely using connecting bolts 5 and the distance between this formwork and the PC board.
Then, set the beam formwork and slab formwork, arrange the slab reinforcement 11, and finally pour concrete between the PC board 2, wall formwork and beam formwork, and on the slab formwork. , External wall, beam 8 and slab 10'5 will be constructed. The same process is performed for the upper layer.

Although the side surfaces of the ribs 2a do not necessarily have to be tapered surfaces, if they are sloped so as to engage with the wall concrete as shown in the figure, the connection with the wall concrete will be strengthened.

As another embodiment of the non-operational switch 4, as shown in FIG.
A heat insulating film 4 a f may be provided on the film surface on the side of the plate 2, and in this way, condensation r4 etc. on the inner surface of the outer wall can be prevented.

Furthermore, if the connecting bolts 5 are configured as shown above, they will function as a separator during the pouring of wall concrete, thereby preventing the PC board 2 from deforming due to the lateral pressure of the concrete. Of course, is this the case with the connecting bolt? x stock Noh? No need to carry it. Further, the provision of the connecting bolt 5 protruding from the rib 2a contributes to making the PC board 2 thinner.

The building frame 1 may be made of steel reinforced concrete,
It is not necessarily limited to reinforced concrete construction.

(Effects of the Invention) As explained above, according to the present invention, since ribs are provided horizontally protruding from the inner surface of the PC board of the outer wall, it is possible to prevent the PC board from warping due to temperature changes or drying shrinkage of the wall concrete. This prevents the horizontal tensile stress of the concrete wall from propagating to the PC board, thereby preventing cracking.Furthermore, by installing an insulating film and making it possible for the connecting body to follow the concrete wall, it is possible to prevent The sliding of walls caused by earthquakes and temperature changes can be smoothed, and cracks in the PC board can be suppressed.Therefore, there is no problem with water leakage, and deterioration of the durability of the exterior walls can be prevented, extending the life of the building structure. The beauty of the external appearance of the singing body can be maintained over the long term.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of the main parts, Figure 2 is a partially cutaway rear view of the 1iPC board, Figure 3 is an enlarged cross-sectional view showing how the connecting bolts are installed, and Figure 4 is another example of the insulating film. This is a large cross-sectional view of the shim showing the installation condition. l... Building frame, 2... PC board, 2a... Rib, 3
...Conch'J-to wall, 4...broken membrane, 4a
. . . Heat insulating membrane, 5. Connecting body, 6. Rubber-like body. Above Figure 1 2: PC board 2: Rip 3:] Concrete wall 4: Thread-colored border 4α: Heat insulating film 5: Antagonist

Claims (5)

[Claims] (1) In a building frame having a composite exterior wall consisting of a PC board and a concrete wall inside the PC board, a plurality of ribs are provided horizontally on the inner surface of the PC board and extend over the entire width,
The PC board and the concrete wall are connected by a connecting body protruding from the inner surface of the PC board, an insulating film is interposed at the joint between the concrete wall and the inner surface of the PC board, and the connecting body is connected to the concrete wall. A building frame characterized by being able to follow the horizontal movement of. (2) The building frame according to claim 1, wherein the side surface of the rib is an inclined surface so as to engage with the wall concrete. (3) The building frame according to claim 1, wherein the insulating film has a film surface on the PC board side that is a heat insulating film. (4) The building frame according to claim 1, wherein the connecting body projects from the rib. (5) A building frame according to claim 1 or 4, characterized in that the connecting body is a connecting bolt capable of holding the formwork of a concrete wall.