JPS6018272B2 - Welding method for stiffening plates inside box-shaped cross-section steel members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for welding stiffening plates inside a box-shaped cross-section steel member.

As structural members, those with closed sections that are symmetrical about the neutral axis are very advantageous in terms of cross-sectional performance, and box-shaped closed sections are often used as steel columns such as pills. ing.

Among these, in the case of column members, stiffening plates are required at the intersections of girders, etc., and several methods have been proposed in the past for welding and joining this stiffening plate to the outer peripheral constituent plate materials. However, both have the disadvantage that bending deformation occurs in the plane passing through the member axis, or that the stiffening plate is too tightly constrained before welding, resulting in excessive residual stress or partial strain after welding. be. The present invention provides at least one welding groove required on two opposing sides of the stiffening plate by sliding one side of the stiffening plate onto the inside of one of the two opposing outer circumference constituent plates. A method of welding a stiffening plate inside a box-shaped cross-section steel member, which can suppress distortion and residual stress in this part by welding two auxiliary plates so that it can be held in a stable condition as much as possible. The purpose is to provide the following.

For this reason, the configuration of the present invention is a method for welding four-sided stiffening plates fixed inside four outer circumferential plates that are connected to each other so as to have a box-shaped closed cross section. Two auxiliary plates are welded to form one welding groove on the inside of one of the two outer circumferential constituent plates so that one side of the stiffening plate can be slidably sandwiched therein, In addition, two auxiliary plates are welded to the inside of the other outer peripheral plate so that the other side of the stiffening plate can be slidably held, or two auxiliary plates are welded to the other side of the stiffening plate. The other welding groove is formed by either welding the auxiliary plate, and the remaining two outer circumferential constituent plates are each provided with a notch that fits both of the welding grooves. After the Tachibana Tsuyoshi plate 5 is inserted into the welding groove and fixed at a predetermined position inside the four outer circumference constituent plates, the two welding grooves 8 are filled with the above-mentioned welding grooves provided in the outer circumference constituent plates. The method is characterized in that a welding material is inserted through the notch and both welding grooves are welded simultaneously by electroslag welding or electrogas welding, or welding is performed at appropriate times.

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 to 4, 1 is blank, 4 is a steel outer peripheral plate, 5 and 5' are steel stiffening plates, and 6
and 7 are steel auxiliary plates, 8 and 8' and 9 and 9' are welding grooves, and 10 and 10' and 11 and 11' are notches.

That is, one of the welding grooves 8, as shown in an enlarged view in FIG.
Of these, there is a tub rigid plate 5 on the inside of one of the outer peripheral constituent plate materials 3.
It consists of two auxiliary plates 6 welded together so that one side of the stiffening plate 5 can be slidably sandwiched, and the other weld groove 9 has two auxiliary plates 7 welded to the other side of the stiffening plate 5. It consists of things that have been done.

The other tub Okayama plate 5' is constructed in the same manner, and also has a welding groove 8' on one side and a welding groove 9' on the other side (see Fig. 2), and both stiffening plates 5'.
and 5' are arranged in parallel at positions and intervals corresponding to the beams to be attached. In addition, the outer peripheral constituent plate materials 1 and 2 have a notch 10 that fits the welding groove 8, a notch 11 that fits the welding groove 9,
A notch 10' that fits the welding groove 8' and a notch 11' that fits the welding groove 9' (see FIG. 3) are provided. Next, an example of a welding method will be explained.

First, as shown in FIG. 1, the welding grooves 8 and 8' of the outer circumferential plate material 3 are aligned with the notches 10 and 10' of the outer circumferential plate material 2, respectively, so that the two parts 3 and 2 are joined and fixed. Then, one side of the stiffening plate 5 is loosened into the welding groove 8, and one side of the stiffening plate 5' is fitted into the welding groove 8' to fix it appropriately. and 10'
and 11' are aligned with the welding grooves 8 and 9 and 8' and 9', respectively, and the outer circumferential constituent plate material 1 is joined and fixed to the outer circumferential constituent plate material 3 and the stiffening plates 5 and 5', and the outer circumferential constituent plate material 4 is It is bonded and fixed to the outer peripheral constituent plates 1 and 2 to form a box-shaped closed section steel frame. Next, welding material is inserted into the two welding grooves 8 and 9, and the grooves 8 and 9 are simultaneously welded.
Similarly, welding material is inserted into welding grooves 8' and 9', and
and 9' part at the same time. Alternatively, the welding grooves 8 and 9' facing in the same direction may be simultaneously welded, and then the other welding grooves 9 and 8' facing in the opposite direction may be simultaneously welded. The welding groove may be welded by electroslag welding, electrogas welding, or the like. Furthermore, in order to form the above-mentioned box-shaped closed cross-section steel frame member, it is preferable to adopt an optimal method depending on the member, such as the location and order of temporary welding of each member. In the second embodiment of the present invention shown in FIG. 5, in order to form a weld groove 9'', the pond edge of the stiffening plate 5 is placed inside the other outer circumference constituent plate material 4, just as in the case of the weld groove 8. Two auxiliary plates 7 are welded together so that they can be slidably sandwiched, and other aspects are similar to the previous embodiment.

In this second embodiment, since the supplementary mountain plate 5 is slidable in the welding grooves 8 and 9'', it can be temporarily welded or Therefore, the method of welding a reinforcement plate inside a box-shaped cross-section steel frame village according to the present invention involves welding at least one of the required weld grooves on two opposing sides of the reinforcement plate. Welding is achieved by welding two auxiliary plates so that one side of the auxiliary Okayama plate can be slidably sandwiched inside one of the two opposing outer circumference constituent plates. The restraint of the front Tachibana Tsuyoshi plate is not too strong, and even if the weld groove is welded with a large heat input such as electroslag welding, the local strain and residual stress in this part are kept small. Therefore, the effect that it has is extremely great, such as preventing circular bending deformation from occurring on the plane passing through the axis of the member.

[Brief explanation of the drawing]

1 is a partially cutaway perspective view of a first embodiment of the present invention, FIG. 2 is a view taken along the line A-A in FIG. 1, and FIG. 3 is a 1 in FIG.
FIG. 4 is an enlarged view of a part of FIG. 2, and FIG. 5 is an explanatory diagram of a second embodiment of the present invention corresponding to FIG. 4. It is. 1, 2, 3, 4...Outer peripheral constituent plate materials, 5...
...Supplementary Okayama plate, 6,7...Auxiliary plate, 8,
9... Welding groove, 10, 11... Notch. Multi 1 drawing Multi 2 drawing Multi 3 drawing Multi 4 drawing Multi 5 drawing

Claims (1)

[Claims] 1 In a method of welding a four-sided stiffening plate fixed inside four outer circumference constituent plates that are joined to each other so as to have a box-shaped closed cross section, one of the two opposing outer circumference constituent plates is welded. Two auxiliary plates are welded to form a weld groove on one side so that one side of the stiffening plate can be slidably held inside the outer circumferential plate material, and inside the other outer circumferential constituent plate material. Either two auxiliary plates are welded to the other side of the stiffening plate so that it can slideably hold the other side of the stiffening plate, or two auxiliary plates are welded to the other side of the stiffening plate. The other two welding grooves are formed by forming the other welding groove, and the remaining two outer circumferential constituent plates are each provided with a notch that fits both of the welding grooves, and the stiffening plate is inserted into the welding groove. After the welding material is inserted into the four outer circumferential plates and fixed at a predetermined position inside the outer circumferential constituent plates, the welding material is inserted into both of the welding grooves through the notches provided in the outer circumferential constituent plates. A method for welding a stiffening plate inside a box-shaped cross-section steel member, characterized in that both welding grooves are welded simultaneously by electroslag welding or electrogas welding, or by welding at appropriate times. .