JPS6044458B2 - Connection method for precast concrete wall plates and beams and columns - Google Patents

Description

[Detailed Description of the Invention] This invention provides a method for constructing a building using cast-in-place concrete columns and beams and precast concrete wall boards (hereinafter referred to as PC wall boards). The present invention relates to a joining method that allows displacement of a contact portion and a portion where both sides of the contact portion contact a column portion.

When pouring concrete into columns and beams, the conventional method is to fasten them to the steel frame at both ends, but the beams between the columns are fastened using an integral connecting member. Since the concrete is poured without any concrete being placed, there are defects in the welded parts of these joints that cannot withstand stress such as earthquakes due to breakage or a decrease in strength due to rusting of fasteners. First, several anchor reinforcing bars are installed protruding inside the upper part of the PC wall board, and these anchor reinforcing bars are buried in the poured concrete of the beam part to completely connect the upper part of the PC wall board to the beam part. At the same time, we developed a joining method in which both sides of the PC wall board are superimposed on the column so that they can be displaced through an insulating material. It is fastened only at both ends with strong anchor hardware, and the middle part and the part that abuts the column form a flexible joint that can be moved through an insulating material. This is an improved system that protects the PC wall plate by avoiding the transmission of distortion in the beam section at the intermediate displaceable part. A PC wall board is used as the wall, and anchor hardware 2, 2 is protruded and buried at both ends of the surface corresponding to the beam of the building above, and upper connecting hardware 3, 3 is attached to the upper edge, and Lower fastening hardware 4, 4 for the steel frame of the beam section, which will be described later, are provided on both sides of the lower edge, and height adjustment bolts 5, 5 are installed downward.
It has been established.

An insulating material 6 is pasted or coated on the surfaces of the PC wall board 1 that contact the beams and columns. In order to construct beams and columns by using the PC wall board 1 configured in this way as part of the formwork, first place it on a temporary cradle at the construction site or at a predetermined position on the existing beam 11. The lower edge of the PC wall board is leveled and fastened by operating the height adjustment bolts 5, 5 and the lower fastening hardware 4, 4 on both sides of the lower part.

In addition, the upper part has two anchor metal fittings 2, 2 protruding from both ends in the part corresponding to the beam part, and is fastened to the stay 8 attached to the beam part steel frame 7 by the upper connecting metal fittings 3, 3, and its both side edges. is set corresponding to the column constituent steel frame 9. After the construction is completed in this way, formwork 10 is installed to surround the beam steel frame 7, the reinforcing bars 7″ placed around it, and the column steel frame 9 so that the contact area with the PC wall plate 1 is watertight. After assembling, concrete is poured into the beam section 11, column body 12, and floor section 13 on-site.The PC wall board 1 thus set is
is firmly connected to the beam part 11 by anchor metal fittings 2, 2 at two places on both sides of its upper part, and the part between the two connected parts and the column body 12 is not connected, but is connected via an insulating material 6. The lower part of the PC wall board is movably connected to the beam part 11 by means of connecting fittings, etc., and the vertical and horizontal abutting parts of the PC wall board are sealed with seals 14,
15 so that each can be displaced,
When distortion occurs in beams, columns, etc. due to earthquakes, etc., this stress is alleviated so that it is not applied to the PC wall board.
There is no risk of cracking or destruction.

Then, there are holes corresponding to the beams at both ends of the PC wall board. In order to make the car hardware 2 strong, for example, as shown in FIG. 5, both sides of the reinforcing bar a are bent in the same direction and the ends thereof are bent upward or downward to form hook parts B, b''. Anchor reinforcing bars are formed, two of these are placed side by side and welded to a metal plate c to give strength, and the two pieces are placed opposite each other and used as a set, making it relatively lightweight and strongly fastened. As a result, even though the PC wall board is connected to the beam at only two ends, it can sufficiently withstand external forces.Furthermore, a notch d is provided in the metal plate c so that it can be used during pouring. As mentioned above, when constructing a building using PC wall plates as part of the formwork, it is possible to connect them to the beams only at both ends. According to this construction method, in which the middle part and the part that contacts the column are constructed so that they can be displaced through insulating material, the above-mentioned special effects are produced, so it is particularly suitable for construction of medium-sized and high-rise buildings. be.

Additional related original invention [Patent No. 1263411 (Japanese Patent Publication No. 59-409
No. 84)], a large number of anchor reinforcing bars are installed protruding from the upper part of the precast concrete wall board that contacts the beam, and insulating material is pasted on the parts that contact the pillars on both sides. The upper part of the wall board is fully connected to the beam by pouring concrete into the wall, and is constructed so that it can be displaced relative to the column, making it suitable for low-rise buildings that receive relatively little external force. However, the present invention connects the upper part of the PC wall board to the beam at both ends, and connects the middle and the part that abuts the column so that it can be displaced via an insulating material. This design has been improved to accommodate high-rise buildings, where external forces are relatively large on parts, etc., and to prevent them from being affected by external forces such as distortion.

[Brief explanation of drawings]

Figure 1 is an inside front view of the PC wall plate, Figure 2 is a cutaway side view showing how the PC wall plate is installed, Figure 3 is a cross-sectional plan view taken along the FIG. 5 is a perspective view of the anchor hardware. 1...PC wall plate, 2...Anchor hardware, 3...Upper connecting hardware, 4...Lower connecting hardware, 5...Height adjustment Bolt, 6...Insulation material, 7...Beam steel frame, 7''...Beam reinforcing bar, 8...Stay, 9...Column Constituent steel frame,
10... Formwork, 11... Beam section, 12...
...Column, 13...Floor, 14,15...
····sticker.

Claims (1)

[Claims] 1. When constructing a concrete building, anchor metal fittings are installed protruding from both ends of the part of the precast concrete wall plate that contacts the upper beam, and the parts that contact the upper beam and the parts that contact the pillars on both sides. After affixing or applying insulation material and erecting this precast concrete wall board in the specified position, the anchor hardware protrusion surface and the insulation material surface correspond to the beam and column sections, respectively, and this part is molded. By pouring concrete for the beams and columns on-site to serve as the frame, both upper ends of the precast concrete wall plate are integrally connected to the concrete of the beams using anchor hardware, and both sides are connected to the concrete of the column. A connection between a precast concrete wall plate, a beam part, and a column body, which is displaceably superimposed on the concrete via an insulating material, and whose lower end is connected and held to the lower concrete beam part by means of connecting hardware. Construction method.