JPH0622732Y2 - PC ▲ lower a ▼ plate mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a structure for attaching a PCa plate to a body frame when the PCa plate is used as an outer wall of a structure.

<Prior Art> The following is conventionally known as a structure of this type.

(A) First Conventional Example FIG. 8 is a sectional view of a main part of the first conventional example. An anchor bolt 02 is provided on a slab 01 of a body frame so as to project upward. The U-shaped first metal fitting 03 is attached and the nut 02a is attached.
It is integrated by tightening and welding.

An angle-shaped second metal fitting 04 is integrated with the upper portion of the first metal fitting 03 by welding, and the first and second metal fittings 03, 04 are integrated.
Are integrally supported by the body frame.

Then, the lower end side of the outer wall PCa plate 05 is placed on the second metal fitting 04, and the bolt 07 inserted into the loose hole 06 formed in the second metal fitting 04 is inserted through the washer 08 into the outer wall PCa plate. The lower end of the outer PCa plate 05 is fixed to the skeleton frame by screwing it into the lower anchor bolt 09 of No. 05.

On the other hand, the bolt 011 inserted through the loose hole 010 formed in the first metal fitting 03 is attached to the outer wall P through the washer 012.
Screw in the upper anchor bolt 013 of Ca plate 05,
Even if the skeleton frame is displaced due to an earthquake, etc.
Since the plate 05 does not fall out of the skeleton frame and also passes through the loose hole, P for the outer wall is different from the skeleton frame.
The Ca plate 05 is configured to be relatively displaced in the horizontal direction and to reduce the input of horizontal force from the body frame to the outer wall PCa plate 05.

(B) Second Conventional Example FIG. 9 is a cross-sectional view of the main part of the second conventional example.
An upper side anchor bolt 013 similar to that of the first conventional example is integrally attached to the Ca plate 05 on the upper side thereof, while a lower side is formed of a normal steel material such as SS41 steel material. A mounting bracket 014 having a cross-sectional shape of I-shape is integrally mounted, and the mounting bracket 014
A long nut 015 is welded to the tip of the.

Then, the bolt 016 is screwed into the long nut 015, and the head portion of the bolt 016 is fitted into the first plate 018 welded to the steel frame beam 017 on the body frame side, and in the fitted state, the first part for retaining is prevented. The second plate 019 is welded to the first plate 018 so that the lower end side of the PCa plate 05 for the outer wall is supported by the skeleton frame, while the upper side of the anchor bolt 01
A bolt 022 inserted into the loose hole 021 is screwed into the plate 020 welded to the steel beam 017, and is attached to the frame 3 in the same manner as in the first conventional example.

<Problems to be Solved by the Invention> However, each of the conventional configurations has the following drawbacks.

(A) Disadvantages of the first conventional example The first and second metal fittings 03, 04 must be integrated on the body frame side, which makes the structure complicated,
Further, since the weight of the metal fitting is large because the weight of the outer PCa plate 05 is supported only on the lower side, the metal fitting is large and heavy, and it takes time to install the outer PCa plate 05, which increases the construction period. There was a drawback that it became expensive as well.

(B) Disadvantages of Second Conventional Example All of the weight of the outer wall PCa plate 05 and the horizontal force input due to an earthquake or the like are supported by the mounting bracket 014 mounted on the lower side of the outer wall PCa plate 05. Therefore, it is necessary to sufficiently secure the strength of the mounting bracket 014 itself or the reinforcement of the outer PCa plate 05 for the outer wall in which the mounting bracket 014 is embedded. Therefore, the outer wall PCa plate 05 is expensive. .

The present invention has been made in view of such circumstances, and when the PCa plate is attached as an outer wall to the skeleton of the frame, the installation is easy and the PCa plate can be constructed at low cost, but it is caused by an earthquake or the like. It is an object of the present invention to reduce or suppress the input of the horizontal force to the PCa plate from the body frame.

<Means for Solving Problems> In order to achieve such an object, the PCa plate mounting structure of the present invention has a plurality of four positions including four corners of the PCa plate for the outer wall or portions close to the four corners. A first steel fastener having a cross-sectional shape of I-shape or T-shape is attached to each of them, and the remaining portions at the above-mentioned four locations or the first fasteners adjacent in the horizontal direction are attached.
A second steel fastener with a cross-sectional shape of I or T is attached to the middle of the steel fastener,
These first and second steel fasteners are respectively connected and supported to the skeleton frame, and further, the second steel fastener is
The toughness is greater than the first steel fastener and the skeleton frame and outer wall PC are better than the first steel fastener.
It is configured with a short distance between connecting points with the a-version.

<Operation> According to the above configuration, the distance between the connecting points of the second steel fasteners 3 and 5 is made shorter than that of the first steel fasteners 2 and 4. For example, taking the case of the first embodiment described later as an example. If you take
As shown in the action explanatory view of FIG. 5, the skeleton of the body is horizontally displaced from the natural state shown in FIG. 5 (a) due to an earthquake or the like, and as a result, as shown in FIG. 5 (b). As described above, when the outer wall PCa plate 1 is relatively displaced in the horizontal direction,
Member angle of the second steel fastener 3 (or 5) (P for outer wall
The ratio of the displacement amount B to the distance A between the back surface of the Ca plate 1 and the attachment portion to the frame structure 6 is B / A) is 1st steel fastener 2
(Or 4) larger than the 1st steel fastener 2
Second steel fastener 3 before (or 4) yields
(Or 5) can be yielded and has high toughness, so as shown in the graph of the relationship between member angle and load in FIG. 6, in the second steel fastener 3 (or 5), after yielding, The extension can be caused over a large range, and the horizontal force input from the body frame 6 due to an earthquake or the like can be absorbed by the second steel fastener 3 (or 5), and the first steel fastener 2 (Or 4) can reduce the horizontal force absorbed and PCa plate for outer wall 1
The input of horizontal force to the can be suppressed.

<Embodiment> Next, an embodiment of the present invention will be described in detail with reference to the drawings.

<First Embodiment> FIG. 1 is a schematic side view of a PCa plate mounting structure according to the present invention, and FIG. 2 is a schematic front view of a PCa plate.

In these drawings, 1 is an outer wall PCa plate, and the lower side of each of the outer wall PCa plates 1 is a lower first steel fastener 2 having a lateral cross-sectional shape of I-shape at each of its left and right corners. , 2 are integrally attached, and have a toughness greater than that of the lower first steel fasteners 2, 2 at an intermediate position between both lower first steel fasteners 2, 2 that are horizontally adjacent to each other, and The second lower steel with a lateral cross-sectional shape of I-shape in which the distance between the connecting points with the body frame is shortened by making the projecting length from the outer wall PCa plate 1 shorter than that of the lower first steel fastener 2. The fastener 3 is integrally attached.

Further, on the upper side of each of the outer wall PCa plates 1, upper left first fasteners 4 and 4 having an I-shaped cross section are integrally attached to the left and right corners thereof, respectively, and are adjacent in the horizontal direction. Fits both upper side first steel fasteners 4,
In the middle of 4, the upper first steel fastener 4, 4
The cross-sectional shape I has greater toughness than that of the outer wall PCa plate 1 and has a shorter protrusion length from the outer wall PCa plate 1 than the upper first steel fastener 4 to shorten the distance between connecting points with the body frame. The upper second second steel fastener 5 having a character shape is integrally attached.

The lower first steel fasteners 2, 2, the lower second steel fastener 3, the upper first steel fastener 4,
4 and the upper second steel fastener 5 are connected to and supported by the steel beams 6 of the body frame.

That is, as shown in the enlarged sectional view of the mounting portion in FIG.
A long nut 7 is welded to the tip of each of the lower first steel fasteners 2, 2 and the lower first steel fastener 3, and a bolt 8 having a curved head portion is screwed into the long nut 7. The bolt 8 is attached to the bolt 8 and the retaining plate 9 is locked to the bolt 8.

On the other hand, each of the upper first steel fasteners 4 and 4 and the upper second steel fastener 5 has a plate 10 at the tip.
Are welded to the plate 10, and four nuts 11 ...
Are welded.

A fixing plate 13 having an opening 12 into which the head portion of the bolt 8 is fitted is formed on the upper surface of the flange 6a of the steel frame beam 6.
Is welded, and the mounting plate 14 having a bolt insertion hole (not shown) is welded across the flange 6a and the web 6b of the steel beam 6, and the outer wall PCa plate 1 is hung by a crane or the like, First steel fastener 2,
2 and the lower side first steel fastener 3 respectively, the head portion of the bolt 8 is fitted into the opening 12, and in the fitted state, the retaining plate 9 is welded to the fixing plate 13 to form the outer wall PCa plate 1 The lower end side of the PC is connected and supported by the steel frame beam 6, and the bolts 15 inserted into the bolt insertion holes of the mounting plate 14 are screwed into the nuts 11 and the nuts 17 are tightened through the washers 16 to form the outer wall PC.
The upper side of the a plate 1 is connected to and supported by the steel beam 6.

The lower and upper second steel fasteners 3 and 5 each have a carbon content of 25% to 15% as compared with the lower and upper first steel fasteners 2 and 4 formed of ordinary steel. The content of copper and nickel is increased from 2 times to 20 times or more, and the content of molybdenum is increased from 10 times to 15 times.
They are formed to have a high toughness by rolling them after controlling them at a predetermined temperature and then tempering them.

That is, when the vertical axis represents the tensile stress degree and the horizontal axis represents the tensile strain degree, respectively, as shown in FIG. 4, in the lower and upper second steel fasteners 3 and 5, respectively, as shown in FIG. Side and upper side first steel fasteners 2 and 4, the yield stress is small, and the yield shelf is large,
Further, it is molded so as to have a characteristic of having a high elongation rate.

As shown in FIG. 5, the outer wall PCa plate 1 is attached to the lower and upper second steel fasteners 3 and 5 having a high toughness. By making the projecting length from the PCa plate 1 shorter than the projecting length in the first steel fasteners 2 and 4, the distance between the connection points with the skeleton frame is configured to be short.

<Second Embodiment> FIG. 7 (a) is a schematic front view showing a second embodiment,
Of the four corner members of the outer wall PCa plate 1, ordinary lower first steel fasteners 2, 2 are integrally attached to the lower two places, while the toughness is provided to the upper two places. The upper second steel fasteners 5, 5 having a large size are integrally attached.

<Third Embodiment> FIG. 7 (b) is a schematic front view showing a third embodiment,
Contrary to the second embodiment, the lower second steel fasteners 3, 3 having high toughness are integrally attached to two lower corners of the four corners of the PCa plate 1 for outer wall. Ordinary upper-side first steel fasteners 4 and 4 are integrally attached to the two upper positions.

<Fourth Embodiment> FIG. 7 (c) is a schematic front view showing a fourth embodiment,
Of the four corners of the outer wall PCa plate 1, the lower second steel fastener 3 having high toughness is integrally attached to the lower left side of the drawing in the drawing, and the lower second steel fastener 3 having high toughness is normally attached to the lower right side of the drawing. Of the lower first steel fastener 2 is integrally attached, while the ordinary upper first steel fastener 4 is integrally attached to the upper left portion of the drawing in the upper drawing. An upper second steel fastener 5 having high toughness is integrally attached to the right side portion.

<Fifth Embodiment> FIG. 7 (d) is a schematic front view showing a fifth embodiment,
Contrary to the fourth embodiment, the lower second steel fastener 3 having high toughness is integrally attached to the lower right side of the drawing in the four corners of the outer wall PCa plate 1, and
An ordinary lower first steel fastener 2 is integrally attached to the lower left side of the drawing, while an ordinary upper first steel fastener 4 is integrally attached to the upper right side of the drawing. The upper second steel fastener 5 having high toughness is integrally attached to the upper left side of the drawing.

<Sixth Embodiment> FIG. 7 (e) is a schematic front view showing a sixth embodiment,
Of the four corners of the outer wall PCa plate 1, ordinary lower first steel fasteners 2 and 2 are integrally attached to the lower two places, respectively, while on the other hand, on the upper left side in the drawing. The ordinary upper first steel fastener 4 is integrally attached, and the upper second steel fastener 5 having high toughness is integrally attached to the upper right side portion in the drawing.

In any of the second to sixth embodiments described above, the first
Similar to the embodiment, as shown in FIG. 5, the outer wall PCa plate 1 is attached to the lower and upper second steel fasteners 3 and 5 having high toughness at a mounting position which is more bulged than at other positions. The projecting length from the outer wall PCa plate 1 is made shorter than the projecting length of the first steel fasteners 2 and 4 so that the distance between the connecting points with respect to the skeleton frame is short.

In the above embodiment, the first and second steel fasteners 2,
Although each of 3, 4, and 5 has a cross-sectional shape of I-shape, the present invention may have a cross-sectional shape of T-shape.

<Effect of the Invention> According to the present invention, the horizontal force input from the body frame due to an earthquake or the like is absorbed by the second steel fastener, so that the horizontal force absorbed by the first steel fastener can be reduced. The horizontal force input to the outer wall PCa plate can be suppressed, and the outer wall PCa plate can be prevented from being damaged or destroyed due to an earthquake or the like.

Now, the seismic energy that is about to be input to the outer wall PCa plate due to an earthquake or the like is E, the energy absorbed by the first steel fastener is Wa, the energy absorbed by the second steel fastener is Wb, and the outer wall If the energy absorbed by the PCa plate for PC is Wpca, then E = Wa + Wb + Wpca.

Therefore, the energy absorbed by the second steel fastener as described above (energy absorbed by plastic deformation)
As a result of being able to increase the size, the fastener made from No. 1 steel and the PC for outer wall
The energy absorbed by the a-plate can be reduced, and thus the strength of the first steel fastener and the reinforcement of the outer wall PCa-plate can be reduced.

In addition, the first and second steel fasteners are preliminarily attached to the outer wall PC.
Since it can be attached to the a plate, the structure for attaching the outer wall PCa plate to the body frame can be simplified and the structure can be easily attached to the body frame, as compared with the case where the metal fittings are integrated with the body frame as in the past. The labor for mounting can be reduced and the construction period can be shortened. As a whole, the PC plate for outer wall can be inexpensively mounted on the skeleton frame.

[Brief description of drawings]

The drawings show an embodiment of a PCa plate mounting structure according to the present invention,
FIG. 1 is a schematic side view of the PCa plate mounting structure of the first embodiment, FIG. 2 is a schematic front view of the PCa plate mounting structure of the first embodiment, and FIG. 3 is a main part showing the PCa plate mounting structure. Sectional view of the fourth
FIG. 5 is a graph showing the relationship between tensile stress and tensile strain, FIG. 5 is an explanatory view of action, FIG. 6 is a graph showing the relationship between load and member angle, and FIGS. ) Is a schematic front view showing the PCa plates of the second to sixth embodiments in order, FIG. 8 is a longitudinal sectional view of a main part of the first conventional example, and FIG.
It is sectional drawing of the principal part of a prior art example. 1 ... PCa plate for outer wall 2 ... Lower first steel fastener 3 ... Lower second steel fastener 4 ... Upper first steel fastener 5 ... Upper second steel fastener 6 ... Steel beam of body frame

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazuo Murai Inventor, Kazuo Murai, 3-18 No.8, Mokudori, Mihara-cho, Minamikawachi-gun, Osaka Prefecture, Takenaka Corporation Technical Research Institute, Osaka Branch (56) Reference JP-A-61-169552 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A first steel fastener having a cross-sectional shape of I or T is attached to each of a plurality of locations including four corners of a PCa plate for an outer wall or a portion close to the four corners, and the first steel fasteners of the four locations are provided. The cross section is I-shaped or T-shaped at the rest or in the middle of the first steel fasteners that are adjacent in the horizontal direction.
While attaching a second steel fastener in the shape of a letter and connecting and supporting each of these first and second steel fasteners to the skeleton of the skeleton, the second steel fastener has a greater toughness than the first steel fastener. The PCa plate mounting structure is characterized in that the distance between the connecting points between the skeleton frame and the outer wall PCa plate is shorter than that of the first steel fastener.