JPH0640649Y2 - Steel plate cross-joint structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cross-joint structure of steel plates used when constructing a steel deck of a bridge.

[Prior Art] For example, in a bridge in which a floor slab is constructed with a steel structure, as shown in FIG. 5, when a steel plate which is a girder material in the bridge width direction is assembled in addition to a steel plate which is a girder material in the bridge axis direction. , For example,
Steel plate 1 which is a continuous girder in the bridge axis direction is divided into 2a and 2b steel plates which are girders in the bridge width direction and assembled in a cross shape, and these steel plates 1 and 2a and 2b are joined to form a steel plate. 2a and 2b are integrated. That is, steel plate 1 and steel plates 2a and 2b
In the case of cross-joining, the angle steel 3 is arranged at each of the four corners formed by the steel plate 1 and the steel plates 2a and 2b, and the adjacent angle steels 3 are sandwiched between the steel plate 1 and the steel plates 2a and 2b. Tighten with high tension bolts 4 to secure steel plates 2a, 2b
The method of integrating is mainly adopted.

[Problems to be Solved by the Invention] However, in the case of the above-described conventional cross-joint structure, the steel plate 1
The angle steel 3 is used as it is as a joining material between the steel plates 2a and 2b and the adjacent angle steels 3 are connected to each other with the steel plate 1 and the steel plates 2a and 2b interposed therebetween, but the rigidity of the angle steel 3 is weak. , For example, when a tensile force is applied to one steel plate 2a in the bridge width direction, the angle steel 3 at the corner portion between the steel plates 2a and 1 stretches and the corner portion floats up, acting on the steel plate 2a. There has been a problem that the tensile force applied is not sufficiently transmitted to the other steel plate 2b. Therefore, the conventional method as shown in FIG. 5 can be adopted only in a place where a tensile force does not act, and it has been considered that the conventional method should be used carefully.

In order to solve this problem, a series of steel plates similar to the steel plate 1 is used instead of the separate steel plates 2a and 2b.
It is conceivable to make a notch in it and assemble it in a cross shape,
Providing a notch in each part has a problem that the processing work is troublesome and requires a lot of labor.

Therefore, in the present invention, in the cross joining of steel plates, when a tensile force or a compressive force acts on one of the discontinuous steel plates, the force of the steel plate can be reliably transmitted to the other steel plate. It is intended to propose a cross-joint structure.

[Means for Solving the Problems] In order to achieve the above object, the present invention arranges a corner block at each corner formed by cross-shaped steel plates so as to directly contact each steel plate, Further, the corner blocks facing each other in the diagonal direction are directly tightened by high tension bolts, and a steel plate is sandwiched between adjacent corner blocks to be joined in a cross shape.

[Operation] By directly tightening the corner blocks arranged at the corners of the cross joints of the steel plates with high tension bolts, one steel plate that is not continuous at the cross joints and the other steel plate are adjacent due to the tension force of the high tension bolts Since the corner blocks are sandwiched and joined by only frictional force to be integrated, when a tensile force or a compressive force acts on the one steel plate, the force can be surely transmitted to the other steel plate.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show one embodiment of the present invention, in which steel plates 2a and 2b are arranged at right angles on both sides of a continuous steel plate 1 and the steel plate 1 and the steel plates 2a and 2b are assembled in a cross shape. The case of joining is shown.
Corner blocks 5a, 5b, 5c, 5d made of trapezoidal metal pieces are arranged at the four corners formed by the steel plate 1 and the steel plates 2a, 2b so as to be in direct contact with the steel plates 1, 2a, 2b. And, among the corner blocks 5a to 5d, the corner blocks 5a and 5c, 5b and 5d that face each other in a diagonal direction.
Directly tighten each other with the high tension bolts 6 to connect the steel plate 1 and the steel plates 2a and 2b to the corner blocks 5a.
Integrate through ~ 5d. Reference numeral 7 in the figure indicates a commonly used splicing plate. The corner blocks 5a, 5b, 5c, 5d are
Since it has a trapezoidal shape, by arranging it at the four corners formed by the steel plate 1 and the steel plates 2a, 2b, a thick regular square tube is formed, and the steel plates 1, 2a, 2b are It is held between the corner blocks 5a, 5b, 5c, 5d.

By directly tightening the corner blocks 5a, 5b, 5c, 5d arranged at the corners formed by the cross arrangement of the steel plate 1 and the steel plates 2a, 2b by the high tension bolts 6 in the diagonal direction as described above, the high tension bolts Due to the tension force of 6, the corner blocks 5a, 5b and 5c, 5d adjacent to each other with the steel plate 1 sandwiched therebetween are integrated by a prestressing structure, and the steel plate 2a and the corner blocks 5a, 5b,
Also, the steel plate 2b and the corner blocks 5c and 5d are integrated by friction welding. In this case, for example, if the tightening force of the high tension bolt 6 is F, each steel plate 1,
2a and 2b are from both sides Therefore, the high tension bolt 6 is coupled with a strong frictional force in proportion to the tightening force of the high tension bolt 6. The preload force in this case is from the corner blocks 5a and 5d. And from corner blocks 5b and 5c So the total works Becomes Therefore, when tensile stress (or compressive stress) acts on one of the steel plates 2a, the stress is transmitted to the corner blocks 5a, 5b sandwiching the steel plate 2a by frictional force, and the force is further connected by the high tension bolt 6. Side corner blocks 5c, 5d, and is transmitted to the steel plate 2b, and as a result, the above tensile stress is received by the entire joining structure.
It is possible to prevent that the tensile force or the compressive force acting on the side is not transmitted to the steel plate 2b side. in this case,
The sliding force of the steel plate 2a is 1/2 when the friction coefficient is And preload force 1/4 of that. The preload force will not be insufficient with the design force set by dividing the sliding force by the safety factor.

Next, FIG. 3 and FIG. 4 both show an example in which the shape of each corner block 5a, 5b, 5c, 5d is changed as another embodiment of the present invention. In the case of FIG. The corner blocks 5a, 5b, 5c, 5d in the embodiment shown in FIG. 2 are formed by using the corner blocks 5a, 5b, 5c, 5d having a shape such that the outer corners are dropped and the inner corners are raised. In the case of Figure 4,
The fan-shaped corner blocks 5a, 5b, 5c, and 5d are formed so as to form a thick cylinder when arranged at the four corners.

In the case of the embodiment shown in FIGS. 3 and 4, since the corner blocks 5a, 5b, 5c, 5d can be brought into contact with the steel plate 1 and the steel plates 2a, 2b at a substantially right angle, the high tension bolt 6 The distribution of the tightening stress due to is almost uniform, and there is an advantage that a more reliable friction welding state can be obtained.

In addition, in each of the above-described embodiments, the continuous steel plate 1 and the steel plate 2a
Although the case of cross-joining 2b is shown, steel plate 1 is replaced by steel plates 2a and 2b.
In the same way as in the case of discontinuity at the cruciform joint, it can be joined in the same manner, and it can be applied to structures in all fields other than the steel deck of the bridge, and within the range not departing from the gist of the present invention. Of course, various changes can be made.

[Effects of the Invention] As described above, according to the cross-joint structure of steel plates of the present invention, the corner blocks are arranged at the corners formed by the cross-assembled steel plates so as to be in direct contact with the steel plates and face each other. By directly tightening the corner blocks facing each other in the line direction with high tension bolts, the discontinuous steel plate and the corner block that holds this at the cross joint are joined only by friction force. Even if a tensile force or a compressive force acts on a steel plate, the force can be transmitted to the entire structure and reliably transmitted to the other discontinuous steel plate, and only one of the above steel plates is displaced to the other steel plate. It has the excellent effect of being able to prevent situations in which power cannot be transmitted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a steel plate cross-joint structure of the present invention, FIG. 2 is a sectional plan view of FIG. 1, FIG. 3 and FIG.
Each of the drawings is a sectional plan view showing another embodiment of the present invention, and FIG. 5 is a sectional plan view showing a conventional structure. 1,2a, 2b ... Steel plate, 5a, 5b, 5c, 5d ... Corner block, 6 ...
High tension bolt.

Claims (1)

[Scope of utility model registration request] 1. A corner block is disposed at each corner formed by cross-shaped steel plates so as to be in direct contact with each steel plate, and the corner blocks facing each other in a diagonal direction are respectively connected by high tension bolts. A cross-joint structure of steel plates, characterized in that the steel plates are clamped directly and sandwiched between adjacent corner blocks and joined in a cross shape.