JPS5843542B2 - Joining method of post-tensing type PPS concrete members and fixing plate for the joining - Google Patents

Description

Detailed Description of the Invention When a boss tension type P, S (abbreviation for prestressed) concrete member is to be joined to a member to be joined, an interlayer member made of heat softening material is attached to a coupler between the two, and the interlayer member is A joining method in which the tension force of the tension rod of the P, S concrete member is introduced into the tension rod of the member to be joined by heating and softening is described in Japanese Patent Publication No. 48-39664, which was invented by the present applicant, and is well known.

Therefore, P used in a series of structures or buildings.

S Concrete members often come across cases where it is necessary to apply different tension forces to the tension rods for each pair of columns, beams, etc. to join them.

In other words, RS fitted with tension bars with different diameters
It is desired that it can be used for joining concrete members.

The present invention provides two P and S tension rods with different tension forces.
A method of joining concrete members, for example, attaching a large beam with high tension on one side of a column and a small beam with low tension on the other side of the column (for example, in a building, a terrace or other protruding beam for the main structure with a large beam attached) A method and device for joining when installing or other cases, including a fixing plate that divides the tension force on the joined straight tension rod into sections, and a fixing plate for this tension bar attached to P, S concrete. The present invention provides a joining method and a fixing plate for joining, which can be attached to one side of a member and significantly reduce the number of locations where a heat-softening interlayer member is used.

To explain the joining method of the present invention and the fixing plate for joining with reference to the drawings, the left end of the P and S concrete members 1 is attached with the fixing plate 3 that can be loosely fitted to the tension bar 2, and the tension bar protrudes outward. A heat-softening interposer member 4 made of epoxy resin, polycarbonate resin, etc. is fitted onto the holder 4, and a locking nut 6 is screwed thereon.

A tension rod 2 is passed through the fixing plate 5 for joining of the present invention at the right end of the concrete member 1, and the tension rod 2 and the fixing plate 5 are firmly fixed by screwing, welding, or other means.

Therefore, the tension rod 2 is prestressed and stretched to the left.
Tighten the retaining nuts 6 to form the P and S concrete members for the girders.

For the P and S concrete members 7 for small beams, the right end of a tension rod 8 having the same diameter as the tension rod 2 (a small diameter is also acceptable) is fixed through the hole in the fixing plate 9 as shown in FIG. is fixing plate 1
0 loosely and prestress the locking nut 11.
Tighten.

Therefore, the left and right ends of each of the concrete IJ-1 materials 1.7 are connected to the pillar 12, the tips of the pixel tension rods 2.8 are connected with the coupling 13, the sheath 14 is set, and the concrete is placed around it. 15 is poured and hardened, and the fixing plate 9 and the concrete member 7 surrounding the tension rod 8 on the left side thereof are fixed to the support column 12.

The interlayer member 4 is then heated and softened, and the tensioning force of the tensioning rod 2 is introduced into the tensioning rod between the locking nut 6 and the fixing plate 9.

Therefore, this tension rod is connected to the concrete IJ-to member 1,
7 can be joined regardless of the difference in tension between the concrete members 7 and the support columns 12, and the use of an intermediary member can be omitted for joining the concrete members 7 and the support columns 12. Furthermore, the fixing plate 9 can be connected to the concrete 15 around the sheath 14.
Since the concrete member 7 is held by the support column 12 and receives the tension force from the tension rods 2 and 8, the concrete member 7 is firmly held by the support column 12.

If desired, the anchoring plate 5 at the right end of the concrete member 1 may be a conventional anchoring plate that can be loosely fitted onto the tension rod 2 and tightened with a dowel locking nut.

In addition, the joining device is not limited to being installed within the pillar;
It may be provided in a groove in a part of the concrete member.

Also, the anchoring plate 9 is not held by the concrete around the sheath 14, but is simply bolted to the concrete member 7 (not shown).
It may be anchored by etc.

As shown in FIG. 3, one embodiment of the fixing plate of the present invention is made by passing a tension rod 22 through a hole 21 of the fixing plate 20, performing welding 23, and then tightening a small diameter plate 24 fitted with the tension rod 22. Bar 22
25 welded to.

When the difference in tension between the right and left sides of the fixing plate 20 is small, the small diameter plate 24 may be omitted.

In another embodiment of the fixing plate of the present invention, as shown in FIG. One end of a threaded rod 31 is screwed into the large-diameter hole 30, and one end of a large-diameter tension rod 32 is screwed into the large-diameter hole 30.

The protruding portion only increases the threaded engagement area of the tension rod and may be omitted.

Another embodiment of the fuser plate of the present invention is shown in FIG.
is passed through the protrusion, a screw 39 is screwed together from around the protrusion, and the tip of the screw 39 is pressed onto the tension rod 38 to fix the tension rod 38 to the fixing plate 36.

As described above, in the joining method of the present invention, the fixing plate fixed to the tension bar is attached to one side of the concrete member, and the fixing plate loosely fitted to the tension bar is attached to the other side, thereby preventing the prestressing of the tension bar. Moreover, even if there is a difference in the tension force of the tension rods across the fixing plate on one side, the tension rods can be joined, and the number of heat-softening intervening members used for introducing tension force can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of a building for explaining the joining method of the present invention, Fig. 2 is an enlarged longitudinal sectional view of a part of Fig. 1, and Fig. 3 is a longitudinal sectional front view of an embodiment of the fixing plate. , FIG. 4 is a longitudinal sectional front view of another embodiment of the fixing plate, and FIG. 5 is a partially longitudinal sectional front view of another embodiment of the fixing plate. 1.7・Concrete members, 2,8・Tension rods, 3.10
・Fixing plate with tension rod loosely fitted, 5゜9・Fixer plate fixed to tension rod, 4・Interface member, 11・Retaining nut, 1
3. Coupling.

Claims (1)

[Scope of Claims] 1. A first fixing plate is firmly fixed to one end of a first tension rod penetrating the first concrete member, and a second fixing plate is loosely fitted to the other end, A third fixing plate is fixed to one end of a second tension rod that penetrates the concrete member, and a fourth fixing plate is loosely fitted to the other end, and a first fixing plate is attached to the outside of the second fixing plate. A first locking nut is disposed through a heat-softening intermediary member and is screwed onto the first tension rod, and a second retaining nut is disposed on the outside of the fourth fixing plate via a second heat-softening intermediary member. arranging a second locking nut and screwing it onto the second tension rod to introduce the first and second tension forces, and installing the first and fourth fixing plates facing each other; 1st
one end of the tension rod and the other end of the second tension rod are connected to each other via a coupling, and the second heat-softening intermediate member is heated and softened to connect the second locking nut and the second tension rod. 1st
A method for joining pinis concrete members of a boss tension type, characterized by introducing tension force between the fixing plate and the fixing plate. 2. In a bonding fixing plate that is attached to the end of a tension rod that penetrates a concrete member, the tension rod is inserted into a through hole in the bonding plate, and the tension rod is firmly fixed to the bonding plate in the through hole. A fixing plate for joining boss tension type pinis concrete members, which is characterized by: