JPS5835766Y2 - Joint structure of steel structures - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a joint structure for steel structures.

Conventionally, the structure of joints for connecting the cross beams of columns on-site in steel structures is generally shown in Figures 1 to 3. - When joining the cross beam 3 to the support cross beam 2, both cross beams 2 and 3 are tightened with high-strength bolts 7 using the upper splice plate 4, the lower splice plate 5, and the vertical splice plate 6.

For this reason, a large number of high-strength bolts 7 are required to tighten the attachment plates 4, 5, 6 at the joint and the attachment plates 4, 5, 6, which increases the weight of the button and the processing/assembly. This method has disadvantages in that the number of man-hours required increases, and the work is complicated because the cross beams must be supported and fixed during jointing.

This invention was devised in view of the above points, with the aim of obtaining a lightweight joint structure that is easy to assemble.3 Its characteristics are that the lower flange of the supporting cross beam is welded to the column. Extend the upper flange of the cross beam to the required length for the lap joint, extend the web of either side beam to the outside of the flange, and bolt the upper end of the web of the support cross beam welded to the column to the support cross beam. The web bottom ends of the cross beams to be installed are removed to the required length for the lap joint, and the bottom flange of the cross beam or the top flange surface of the support cross beam is removed so that the cross beam can overlap the support cross beam from above. It has a notch in the center.

The present invention will be explained below with reference to illustrated embodiments.

First, an embodiment of the present invention will be explained based on Figs. 4 to 10. Similar to the embodiment shown in Figs. 1 to 3, 1 is a column, and 2 is fixed to the column 1 by welding. A support cross beam 3 is a cross beam connected to the support cross beam 2.

The support cross beam 2 has its lower flange overlapped and extends to a length necessary for the joint, and holes for bolt tightening are provided in this.

Furthermore, the center portion of the upper flange surface is provided with a notch 2b having a length necessary for the lap joint, and a hole for tightening a bolt.

Further, the web 2a is fixed to the upper flange and the lower flange with the same length as the upper flange and offset from the center by the plate thickness,
The required length of the fitting from its upper end is removed at least outside the thickness of the upper flange.

Holes are provided for overlapping the web 3a of the cross beam 3 and fixing it with bolts.

On the other hand, the lower flange of the cross beam 3 is overlapped and the length required for the joint is cut out to form a triangular structure (the upper flange is extended).

) The lower end of the web 3a is removed at least beyond the thickness of the lower flange.

Holes for fixing with bolts are provided in the upper flange, lower flange, and web.

When joining the cross beam 3 to the supporting cross beam 2, the upper flange, lower flange, and webs 3a, 2a are fixed to each other using overlapping bolts γ directly from the side or above.

Therefore, the upper flange joint surface P1 and the lower flange joint surface P2 are configured to be shifted in position in the longitudinal direction.

In addition, FIG. 7 shows both cross beams 2. and 3. before assembling these cross beams 2 and 3.
3, and FIG. 8 is a plan view of FIG. 7.

10 is a perspective view of FIG. 7. As mentioned above, since the upper and lower flange buttons and web surfaces of the cross beams 2 and 3 are directly overlapped, there is no need for a splicing plate like in the past when joining them, and the number of bolts is about half, which can reduce the weight. When joining, the cross beam 3 can be placed on the cross beam 2 from above and tightened with a Tehort, so construction can be carried out easily.

Next, another embodiment will be explained with reference to FIGS. 11 to 17.

This embodiment differs from the above embodiment in that the web 2a of the support cross beam 2 is extended by the extension length of the lower flange, and the web 3a of the cross beam 3 is made the same length as the lower flange.

A notch 3b is provided at the lower flange end of the cross beam 3 to prevent the web of the support cross beam 2 from touching the cross beam 3 when the cross beam 3 is joined.

The rest is the same as the above embodiment.

As described above, the present invention has a structure in which the upper and lower flange surfaces of the cross beam are directly overlapped, so that the force acting on the cross beam is directly transmitted through the joint surface without going through the splice plate.

Furthermore, there is no need for a splicing plate on the joint surface, which saves on materials and high-strength bolts because no splicing plate is required, reducing assembly man-hours, which has a significant effect on reducing the cost of the joint. There is.

[Brief explanation of drawings]

Figure 1 is a side view of a joint of a conventional steel structure, and Figure 2 is a side view of a joint of a conventional steel structure.
Figure 3 is a plan view of Figure 1A-Ali, Figures 4 to 10 show an embodiment of the present invention, Figure 4 is a front view, and Figure 5 is a side view of Figure 4. The plan view of Fig. 6 is B- of Fig. 4.
B sectional view, Fig. 7 is a front view before assembly of both cross beams, Fig. 8 is a plan view of Fig. 7, Fig. 9 is a sectional view taken along A-A of Fig. 1,
Figure 0 is a perspective view of Figure 7, Figures 11 to 17 show other embodiments, Figure 11 is a front view, and Figure 12 is a perspective view of Figure 1.
Fig. 1 is a plan view, Fig. 13 is a sectional view taken along line B-B in Fig. 11, Fig. 14 is a plan view before the cross beam is assembled, Fig. 15 is a plan view of Fig. 14, and Fig. 16 is a cross-sectional view of Fig. 11. FIG. 11 is a sectional view taken along line AA in FIG. 11, and FIG. 11 is a perspective view of FIG. 14. 1 is a column, 2 is a support cross beam, 3 is a cross beam, 2a and 3a are webs, 2b and 3b are notches, 7 is a high-strength bolt, Pl is an upper flange joint surface, and P2 is a lower flange joint surface.

Claims (1)

[Scope of utility model registration request] A short support cross beam 2 with a ■-shaped cross section is fixed to the column 1 by welding,
This is a joint structure for a steel structure in which a cross beam 3 having approximately the same cross-sectional shape as this is fixed with bolts during construction, and the lower flange of the supporting cross beam 2 fixed to the column 1 is closer to the upper flange than the upper flange. The upper flange of 3 extends from the lower flange by the length necessary for the lap joint, and the web 2a of the support cross beam 2 and the web 3a of the cross beam 3 are connected to each other. , one of which is configured with a flange extending outward, and the web 2a of the support cross beam 2
The upper end and the lower end of the web 3a of the cross beam 3 are removed from the thickness of the flanges of both cross beams 2 and 3 by at least the length required for the overlap joint, and furthermore, it is difficult to stack the cross beam 3 on the supporting cross beam 2 from above. If the web 2a is extended so that there is no
When extending, a notch 3b or notch 2b is provided in the center of the upper flange surface of the support cross beam 2, and the upper and lower flange surfaces of both cross beams 2, 3 and the web surface are directly overlapped and joined with bolts. Joint structure of steel structures.