JPS6130102B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for attaching a curtain wall panel made of precast concrete to a building frame.

When installing a precast concrete curtain wall panel (hereinafter referred to as a PC panel) to a building frame, it is said that the PC panel must not only follow the deformation of the frame due to earthquakes, but also be sufficiently safe against wind pressure. ing. In particular, when installing PC panels in buildings that are subject to large amounts of deformation and wind pressure, such as steel-framed skyscrapers, consider devising the mounting device and the PC panel itself so as not to cause any problems to the PC panel. There is a need.

This invention creates a two-layer PC panel by continuously molding a single-layer panel into the upper and lower panels, which improves wind resistance and reduces panel weight compared to the conventional single-layer PC panel. In addition, it is extremely advantageous for the design of the frame, and the vertically arranged two-layer panel system allows for smoother deformation of the frame than the conventional sliding method. It has an extremely high tracking ability, and it is possible to introduce an extremely stable locking method that fits in the corner of a building no different from ordinary parts.Furthermore, the installation method is simple, and the fasteners are small. The present invention provides a new PC panel mounting structure that can be completely housed within the frame slab to facilitate internal finishing.

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

1 is a two-story PC panel, 2 is a building frame beam, 2a is an upper beam, and 2b is a lower beam.

As shown in FIGS. 1 and 2, the PC panel 1 has windows 3 and 3 on the upper and lower sides, and has a stepped portion at the center of the upper and central portions facing the upper and lower beams 2a and 2b on the back side. An upper fastener 4 and a lower fastener 5 on the panel side made of L-shaped steel are attached. Both ends of the U-shaped anchor bolts 6 and 7 buried in the PC panel are attached to each fastener.
As shown in FIG. 4, the PC panel 1 can be attached to the frame beam 2 using the anchor bolts 6 and 7.

Further, on both sides of the upper and central portions of the PC panel 1, there are sixth fasteners 9 made of T-beams fixed with U-shaped anchor bolts 8 buried horizontally and at the same height as the anchor bolts 6 and 7. It is installed as shown in Figures 1 and 7, and U-shaped anchor bolts 10 and 11 are buried in the upper and lower ends of each PC panel at the same position (see Figure 7). (See Figure 8).

The upper layer girder 2a is provided with an upper fastener 12 on the frame side, which serves as a force applying point to rotate the PC panel 1, and the upper layer girder 2a is provided with a lower fastener 13 on the frame side, which serves as the center of locking of the PC panel 1.
Level bolts 14 are provided to support the weight of the PC panel 1.

The above upper fastener 12 and lower fastener 13
As shown in FIGS. 3 to 5, primary fasteners 122 and 132 made of H-shaped steel have loose holes 121 and 131 drilled in the left and right directions in the top plate, respectively;
Mounting holes 123, 13 for the anchor bolts 6, 7
Secondary fasteners 12 of the same structure are made of L-beam steel and have loose holes 124 and 135, which overlap the loose holes 121 and 131, bored in the front and back directions in the horizontal plate.
5,135, and a primary fastener 122 welded to the side surface of the upper layer girder 2a and the lower layer girder 2b,
132, secondary fasteners 125, 135 are overlapped, and both are integrally connected by bolts 126, 136.

Further, the primary fastener tip of the lower fastener 13 is in contact with the lower fastener 5 on the PC panel side,
A level bolt 14 that supports the weight of the PC panel 1 and allows the height to be adjusted is vertically attached using a cap nut 15.

Therefore, in order to attach the PC panel 1 to the frame beam side, first set the mounting height in advance using the level bolts 14, then suspend the PC panel 1, and then attach the upper and central anchor bolts 6, 7,
Attachment holes 123, 133 made in each secondary fastener 125, 135 of the upper layer girder 2a and the lower layer girder 2b
Fit into. Then, the anchor bolts 6 and 7 are fastened to the vertical plates of the secondary fasteners 125 and 135 using the nuts 16 and 17 while being supported by the level bolts 14.

Also, on both sides of the PC panel 1, the upper girders 2a
and a bracket 18 fixedly attached to the lower girder 2b,
An arm 19 made of a ribbon-shaped metal plate is passed horizontally in contact with both vertical flanges of the fastener 9 of the T-shaped steel on the PC panel side, with the surface of the plate vertically, and bolts 20 are used to connect both sides. Fasten and straddle the pin structure (see Figures 6 and 7).

Once the installation of the PC panel 1 is completed as described above, connect the joint plate 21 to the anchor bolts 10 and 11 at the upper and lower ends as shown in FIG. to connect.

Next, we will discuss the interlayer displacement and the behavior of the PC panel and each fastener in the case of the above structure.In terms of in-plane, as shown in Figure 9, the center support point at the center of the PC panel is A, and the upper center support point is also the same. When B is the interlayer displacement δi, the interlayer displacement δi is changed into a rocking (rotation) motion of the PC panel 1 by the fasteners A and B. In addition, rotatable arms 1 are installed on both sides of each support point A and B, spanning the frame beam side.
9, but since the arm 19 freely follows the vertical deformation of the PC panel 1 due to the rocking motion, the vertical displacement is absorbed in the portion indicated by C.

Also, regarding out-of-plane, as shown in Figure 10,
As in the in-plane case, the interlayer displacement δi is converted into a rocking motion by the fasteners A and B. Further, since the rotation angle of the PC panel 1 for two layers is determined between the upper layers, it may be different from the rotation angle of the lower layer. However, this can be absorbed by bending deformation (warping) of the PC panel itself.

In addition, in the figure, H is the floor height, W is the width of the PC panel, and δ
v is the vertical displacement due to rocking motion, and θ is the panel rotation angle. FIG. 11 is a table showing the relationship between the vertical movement of the support point C due to rocking movement during in-plane interstory displacement and the shrinkage due to the length of the arm 19 when the floor height and panel width are the same. shall be absorbed by bending deformation of the PC panel.

Since the present invention has the mounting structure configured as described above, it produces the following effects.

(1) Since the PC panel is formed to the height of two layers, and has two mounting points (upper and lower), the weight of the PC panel is reduced compared to one with a height of one layer, and it is also wind resistant. Sexuality also improves.

(2) It follows the inter-story displacement of the building frame very smoothly and can adequately handle large deformations.

(3) All fasteners are contained within the frame slab, making internal finishing easy.

(4) It is possible to create PC panels with free design shapes.

(5) Since there are only two installations on the frame beam side, one at the top and one at the center, the number of installations is less compared to the case where two PC panels for one layer are installed.

(6) It is possible to reduce the cost of fastner.

(7) The play (looseness) of the fastener can be almost completely removed.

(8) Since it uses a locking method in both in-plane and out-of-plane directions, it is easy to fit into the building because it does not cause misalignment at the corner of the building.

[Brief explanation of the drawing]

The drawings illustrate the mounting structure of the curtain wall panel according to the present invention. Fig. 1 is a longitudinal cross-sectional side view of the PC panel in the installed state, Fig. 2 is a rear view of the PC panel, and Fig. 3 is a top view of the PC panel. Figure 4 is a vertical side view of the upper girder, Figure 4 is a vertical side view of the central part of the PC panel and the lower beam, Figure 5 is a cross-sectional plan view, Figure 6 is a vertical side view showing how the arm is installed, and Figure 7 is a vertical side view of the upper beam. The figure is a cross-sectional plan view of the same as above, and Figure 8 is the top and bottom.
A longitudinal side view showing the connection of PC panels, FIG. 9 is a diagram showing interlayer displacement and in-plane behavior of the PC panel and each fastener, and FIG. 10 is a diagram showing out-of-plane behavior.
FIG. 11 is a diagram showing the relationship between the vertical movement of the support point C and the contraction of the arm. 1...PC panel, 2...Structure beam, 2a...Upper layer beam, 2b...Lower layer beam, 4...Upper fastener on panel side, 5...Lower fastener on panel side, 6,
7, 8, 10, 11... Anchor bolt, 14...
...Level bolt, 12... Upper fastener on the frame beam side, 13... Lower fastener on the frame beam side, 122,1
32...Primary fastener, 125, 135...Secondary fastener, 123,133...Anchor bolt mounting hole, 19...Arm.

Claims (1)

[Claims] 1. In a structure in which a precast concrete curtain wall panel is attached to a building frame using bolts, nuts, and fasteners, the curtain wall panel is formed to have a height of two layers, with an upper and middle height. The curtain wall panel shall be installed on two layers of upper and lower girders, and upper and lower fasteners on the panel side that pass through anchor bolts will be provided at the top and center of the curtain wall panel facing the girders, and the upper and lower fasteners will have holes for attaching the anchor bolts. Fasteners and lower fasteners are provided on the upper and lower girders, and level bolts for supporting the weight of the curtain wall panel are provided on the lower fasteners, and the upper and lower fasteners on the frame side and the upper and lower fasteners on the panel side are connected to the anchor bolts and nuts. The curtain wall panel is movably connected to the frame side, and the curtain wall panel is attached to the frame side, and the fasteners provided on both sides of the upper and center part of the panel side and the brackets on the girder side,
A mounting structure for a curtain wall panel characterized by an arm made of a metal plate vertically spanning the plate surface in a pin structure. 2. The upper and lower fasteners provided on the frame side are arranged vertically in parallel with the primary fastener fixed to the girder side which has a left-right adjustment loose hole, and the anchor bolt mounting hole is opened at the upper end in a vertical plate, and the horizontal 2. The mounting structure for a curtain wall panel according to claim 1, comprising a secondary fastener made of L-shaped steel, in which a loose hole that overlaps with the loose hole is bored in the front-rear direction in the plate.