JPS584135B2 - How to form panel joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for forming panel joints when joining precast concrete panels that have steel half-columns on both sides and reinforced concrete beams connecting the half-columns at appropriate intervals. This is related to.

A method of constructing a structure by joining steel half-columns on both sides and precast concrete panels containing reinforced concrete beams connecting the half-columns to form a steel column was developed several years ago, and has recently become popular. It is put into practical use.

When joining two half-steel columns to form a steel column, both half-columns must be integrated so that the shear stress and bending stress generated in the beam are transmitted to the steel column.

In particular, the transmission of shear stress and bending stress is important at panel joints, that is, at column sections where beams are connected.

In conventional construction methods, panel joints are formed by connecting both radii of the area by plate welding, by high-tension bolts, by directly welding both half-columns, or by filling concrete between the two half-columns to integrate them. Methods such as measuring are used.

Integration using concrete filling is difficult because the adhesion force between the steel frame and concrete is small, so it is difficult to integrate using only this method.

However, these precast concrete panels are intended for rapid construction of structures, and recently, long panels extending over multiple stories have been manufactured and used as long as they can be transported.

Since these panels are erected adjacent to each other, it is not easy to join the half-columns as described above, and for this purpose, it is necessary to prepare various work conditions, and a high degree of construction accuracy is required. Ru.

This also causes delays in on-site work, making it necessary to take measures to absorb errors in on-site work.

The purpose of the present invention is to connect a precast concrete panel with built-in steel half columns and reinforced concrete beams connecting the columns at appropriate intervals on both sides, and to transfer shear stress and bending stress generated in the beams to the steel column. To provide a method for forming panel joints which can easily form panel joints with sufficient transmission, simplify field work, and easily absorb construction errors.

The method for forming panel joints according to the present invention relates to a method for forming panel joints when joining precast concrete panels that have steel half-columns on both sides and reinforced concrete beams that connect the half-columns at appropriate intervals. It is.

By using this panel as a 3- to 5-story panel for constructing a low-rise simple building with 3 to 5 floors, the effect of the method of the present invention can be increased.

The method of forming panel joints according to the present invention involves passing the main bars and reinforcing bars of the beams through the half-columns in advance, connecting each main bar and reinforcing bar in a U-shape on the outside of the panel, and connecting the beams of the half-columns to each other in a U-shape. U-shaped concrete attachment reinforcements are fixed toward the outside of the panel near the top and bottom, and the U-shaped part formed by the main reinforcement, reinforcing reinforcement, and concrete attachment reinforcement can be closely connected to each other when the panels are joined to each other. This method is characterized in that, when joining the panels, internal reinforcing bars of the steel column are formed in the U-shaped portion, and the inside of the steel column is filled with concrete.

Another method of forming panel joints according to the present invention (second method)
In the method of the invention (method of the first invention), instead of the U-shaped concrete attachment reinforcement in the method described above (method of the first invention), concrete restraining pieces are placed on the upper and lower edges of the part where the half-column beams are connected. Fix it outward, and if necessary,
Attach the parts of the tension piece described below, or perform processing to attach the tension piece, and when joining the panels, pull the concrete restraint piece or the half columns on the same side or in contact with the concrete restraint piece to each other. This method is characterized by connecting pieces.

In a preferred embodiment of the method of the second invention,
The concrete restraint piece is a diaphragm, and the tension piece is constructed by connecting high-tension bolts projecting outward from each half column with long Nantes.

In another preferred embodiment of the method of the second invention, the concrete restraint piece is an angle fixed horizontally to the radius on both sides, and the tension piece is a high tension bolt projecting outward from the ridge of the angle. Constructed by connecting with long nuts.

In yet another preferred embodiment of the method of the second invention,
The concrete restraint piece is a diaphragm, and the tension piece is fixed to the opposing diaphragm, and consists of two parallel vertical plates tightened in the middle with a single high-tension bolt.

The method of the present invention will be explained below based on drawings of examples.

Steel half columns 2, 2' and half columns 2, 2 or 2', 2 are installed on the side of the precast concrete lagoon used in the method of the present invention.
It has built-in reinforcing concrete lagoons 3, 3' that connect the strands 1 at appropriate intervals.

In FIG. 1 and the following drawings, a steel half-column 2, 2/closed channel steel is illustrated.

Channel steel is preferable because of its excellent cross-sectional performance, but the steel frame half-column is not limited to channel steel, and it goes without saying that other types of steel or flat steel may be used.

Precast concrete panels 1, 1' are placed side by side and joined together to form a panel joint.

The panel joint portion of section A in FIG. 1 or the panel joint portion and its vicinity are shown in detail in FIGS. 2 and subsequent figures.

FIG. 2 shows a longitudinal cross-sectional view a and a cross-sectional view b of an embodiment of a panel joint formed by the first method of the present invention.

Spring for carrying out the method of the present invention. The main bars 4, 4' and reinforcing bars 6, 6' of the beams 3, 3' are passed through the half columns 2, 2' in advance, and the main bars 4, 4' are attached to the outside of the panels 1, 1'. ' and each reinforcing bar 6, 6' is connected.

The actual manufacturing work for panels 1 and 1' includes half columns 4,
4', bend the main bars 4, 4' and reinforcing bars 6, 6' into a U-shape, insert them into the beams from the outside of the panels 1, 1', attach the specified tie bars, and then pour concrete. Just set it up.

Also, as shown in Figure 2b, when the panels are joined together, the reinforcing bars should be placed so that the U-shaped parts of the main bars 4 and reinforcing bars 6 of the panel 1 do not intersect with those of the panel 1' and are in close contact with each other. It is necessary to shift the position slightly.

The panels 1, 1' for carrying out the first method of the present invention further include portions that connect the beams 3, 3' of the half columns 2, 2' (portions that form panel joints when the panels are joined). .

) near the top and bottom (indicated by reference numeral 7) (portion that can be approached to the panel joint part of the part that forms the column shaft part when the panels are joined.

) with U-shaped concrete attachment reinforcements 8, 8' on panel 1,
1' is fixed toward the outside.

Similar to the reinforcing bars 6 and 6', the concrete attachment bars 8 and 8' need to be in close contact with each other and not intersect with each other.

In the first method of the present invention, the above-mentioned panels 1, 1' are arranged adjacently in parallel, and are formed by main bars 4, 4', reinforcing bars 6, 6', and concrete attachment bars 8, 8'. The internal reinforcing bars of the steel column formed by the half columns 2 and 2' are formed at the U-shaped portion.

Further, the inside of the steel column is filled with concrete.

Next, the second method of the present invention will be explained based on FIGS. 3, 4, and 5 of the embodiment.

The second method is exactly the same as the first method except that a concrete restraint piece and a tension piece are provided in place of the U-shaped concrete attachment reinforcement in the first method.

Therefore, in FIGS. 3, 4, and 5, parts of the same structure as the panel used in the method of the first invention are partially omitted.

In the second method of the present invention, the upper and lower edges (
It is indicated by BB' in the drawing.

) to which concrete restraining pieces 5, 5' are fixed towards the outside of the panel.

The concrete restraining pieces 5, 5' are diaphragms in FIGS. 3 and 5, and in FIG. 4 are angles fastened horizontally to the half columns 1, 1' on both sides.

Also in the second method of the invention, a tension piece 9 is provided together with the concrete restraint pieces 5, 5'.

The tension piece 9 in the embodiment of FIG. 3 is a high tension bolt (hereinafter referred to as H.T.B.).

) and Naganatsu. Drill holes in the mounting parts of the concrete restraint pieces 5, 5' of the half columns 2, 2', and construct the concrete restraint pieces 5, 5 with pipes and plates that match the holes, as shown in FIG. 3C, H. T. B10,10
' is made to protrude from the hole to the side of the panels 1, 1' through the pipe portions of the diaphragms 5, 5'.

Also H. T. H. B10 should not rotate. T. B1
Weld the head of 0 to half column 2.

H. T. B10' is rotatable, and H. T. B10
' is inserted into the hole of the half-post 2' and the diameter of the pipe of the diaphragm 5' is made large. T. The position can be adjusted within the tolerance range of B10'.

Furthermore, H. T. B10' has H. after panel joining. T. B1
0' is provided with a nut 11 fixed to the bolt.

When joining panels 1 and 1', H. T. B
Insert the long screwdriver 12 into the H.10 and adjust the long screwdriver 12. T. Connect B10 and 10', and finally connect H. T
．． Rotate the fixed nant 11 of B10', and T. B10
, 10' and a long length 12.
gives tension to.

In the embodiment of FIG.
, 5' may be provided.

In the embodiment of FIG. 4, tensioning pieces 9 are provided with H. T. It is composed of B10, 10' and a long nut 12.

The details and connection method of the tension piece 9 in this embodiment are the same as the tension piece 9 in the embodiment of FIG.

In the embodiment of FIG.
The diaphragms 5, 5' of the concrete restraining piece fixed to the concrete restraint piece 2' are fixed vertically to each of the diaphragms 5, 5', and one H. T. It is composed of two parallel vertical plates 13, 13' that are fastened together at B14.

The vertical plates 13, 13' extend in the vertical direction past the diaphragms 5, 5', and form H. T.
It is desirable to tighten at B14.

In the illustrated embodiment, there are two angles with a notch in the center of one surface and both sides left as tightening parts for bolts 15 on the diaphragms 5, 5', and a surface without notches on both sides of the diaphragms 5, 5'. The vertical plates 13, 13' are aligned and perpendicular to the diaphragms 5, 5', and are bolted to the diaphragms, with their unnotched surfaces forming respective vertical plates 13, 13'.

An H. T. Insert B14 (
The diaphragm 5, 5' thickness is H. T. If the diameter is smaller than B14, it is necessary to cut out the angle.

), tension is applied to the vertical plates 13, 13'.

The second method of the present invention is a method in which concrete restraint pieces are provided at the upper and lower edges of the panel joint, and the concrete restraint pieces or half columns are connected to each other by tension pieces, Figures 3, 4 and 5 above
The explanation based on the figures merely describes preferred embodiments, and it goes without saying that various embodiments other than these embodiments may be adopted.

When using the method of the present invention, the panel joint is constructed of U-shaped reinforcement or U-shaped reinforcement, concrete lagoon tension pieces, and poured concrete, and the panel joint of two half-columns is an integral steel column. It is said that
The shear stress and bending stress generated in the beam can be transmitted through the concrete lagoon.

In addition, on-site joining of panels and formation of panel joints can be completed by simply pouring concrete after the panels are erected, or in addition, by tightening bolts that can be easily operated from the gap between the panels, so on-site construction is possible. Simplified.

Also, reinforcing bars and H. T. Since B etc. have sufficient dimensional adjustment functions, manufacturing and erection errors can be absorbed within tolerances.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing how the precast concrete panels used in the method of the present invention are erected, Figure 2 a, b1
3a, b, c, 4 and 5 a, b all show examples of panel joints formed by the method of the present invention. Fig. 2 is a longitudinal sectional view a and a transverse sectional view b of one embodiment; Fig. 3 is a longitudinal sectional view a and b of another embodiment; ' Line sectional view C: Figure 4 is a vertical cross-sectional view of the upper edge of the panel joint of another embodiment: Figure 5
The figures are a vertical cross-sectional view a and a cross-sectional view b of the upper edge of the panel joint of another embodiment. In the drawing, 1, 1' are panels, 2, 2' are half columns, and 3
, 3' are beams, 4, 4' are main reinforcements, 5, 5' are concrete restraining pieces, 6, 6' are reinforcing bars, 8, 8' are concrete attachment reinforcements, 9 are tension pieces, 10, 10', 14 is a high tension bolt, 12 is a long nut, 13, 13'
is a vertical plate.

Claims (1)

[Scope of Claims] 1. When joining precast concrete panels each having steel half-columns provided on both sides at regular intervals and reinforced concrete beams connecting the steel half-columns, the panels are pre-coated with reinforced concrete beams. The main bars and reinforcing bars are passed through the steel half-columns, and each main bar and reinforcing bar is connected in a U-shape on the outside of the panel, and U-shaped concrete attachment bars are placed near the top and bottom of the part where the beams of the steel half-columns are connected. is fixed toward the outside of the panel, and the U-shaped part formed by the main reinforcement, reinforcing reinforcement, and concrete attachment reinforcement is placed in close contact with each other when the panels are joined together. The U-shaped portion acts as a reinforcing bar between the steel half column of one panel and the steel half column of the other panel,
A method of forming panel joints characterized by filling the spaces between both half-columns of steel frames with concrete. 2. When joining precast concrete panels that are equipped with steel frame half-columns provided on both sides at regular intervals and reinforced concrete beams that connect the steel frame half-columns, the panels should be constructed by connecting the main bars and reinforcing bars of the reinforced concrete beams to the steel frame in advance. The steel half columns are penetrated and connected in a U-shape for each main reinforcement and reinforcing bar on the outside of the panel, so that the U-shaped portions are in close contact with each other when the panels are joined together, and Concrete restraint pieces are fixed to the upper and lower edges of the parts where the beams are connected, facing the outside of the panels, and when joining the panels, the steel half columns of one panel and the steel half columns of the other panel are connected. A method for forming a panel joint, characterized in that the U-shaped portions are used as reinforcing bars between the two half-columns of the steel frame, and concrete is filled between the half-columns of the steel frame. 3. The method of forming a panel joint according to claim 2, wherein the concrete restraining piece is a diaphragm. 4. The method for forming a panel joint according to claim 2, wherein the concrete restraint piece is an angle fixed to the steel half column horizontally at both side edges. 5 The concrete restraint piece is a diaphragm,
3. The method of forming a panel joint according to claim 2, wherein the tension piece is formed by connecting high-tension bolts protruding outward from each half-column of the steel frame with long nuts. 6 This is an angle in which a concrete restraint piece is fixed horizontally to a steel half-column on both sides, and a tension piece is a high-tension bolt that protrudes outward from the crest of the angle and is connected with a long nut. A method for forming a panel joint according to claim 2. 7 The concrete restraint piece is a diaphragm,
The panel according to claim 2, wherein the tension piece is fixed perpendicularly to the diaphragm of the concrete restraint piece facing each other, and is two parallel vertical plates fastened together with a single high-tension bolt in the middle of each plate. Method of forming joints.