JPH0476134A - Structure of joint between closed sectional steel pole and steel beam and joining method - Google Patents

Abstract

PURPOSE:To prevent a plate from jolting by making an outer diameter of the band plate to be set up in a steel pole be more smallish than an inner diameter of the steel pole, and filling up a clearance between the plate and a steel frame in and around a bolt with resin. CONSTITUTION:A band plate 3, whose outer diameter is more smallish than an inner diameter of a steel pole 1, is set in the steel pole 1, and an outlet part is temporarily clamped by an erection bolt covered with a rubber film. Next, when liquid epoxy resin 7 is injected from an inlet of the bolt, this resin 7 goes out of the outlet, having the rubber film expanded in a clearance 5. Then, when the resin 7 is hardened, the erection bolt is pulled out and a regular bolt 6 is screwed therein instead.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a joint structure and a joining method between a closed cross-section steel column and a steel beam of a steel frame structure or a steel reinforced concrete structure.

[Conventional technology]

JP-A-63-210322 discloses a joint structure between a closed-section steel column such as a box column and a steel beam made of H-shaped steel.

As shown in Fig. 4, a band plate 3 is disposed inside a closed-section steel column 1 made of square steel pipe, and a split tee 4 is bolted to the outer peripheral surface of the steel column l via this band plate 3. did.

This band plate 3 has a closed cross-sectional shape, and the steel column 1
It goes around the inner circumference of the steel beam 2 and is placed at the height of the upper and lower flanges of the steel beam 2.

Joints between columns and beams in rigid frame structures such as steel structures or steel-reinforced concrete structures are areas where large shear forces and bending moments act, especially when horizontal forces are applied.
By attaching the band plate 3, the stress from the beam is dispersed throughout the column, and the stress can be transmitted smoothly.

[Problem to be solved by the invention]

However, if the band plate 3 does not come into close contact with the steel column 1, the band plate 3 may become loose and the force from the steel beam 2 may not be properly transmitted to the steel column 1.

On the other hand, if the band plate 3 has such dimensional accuracy as to fit perfectly inside the steel column 1, it is difficult to set it inside the steel column 1 because there is not enough room.

An object of the present invention is to solve the above-mentioned disadvantages of the conventional example, and to provide a closure in which a band plate can be easily set in a steel column without wobbling, and the band plate can smoothly transmit stress from a beam to the entire column. An object of the present invention is to provide a joint structure and a joining method between a cross-sectional steel column and a steel beam.

[Means to solve the problem]

In order to achieve the above object, the present invention arranges a band plate with a closed cross section inside a steel column, and through this band plate, the joint hardware of the end of the steel beam is bolted to the outer peripheral surface of the steel column with a closed cross section. In the joint structure between a shaped steel column and a steel beam, the outer diameter of the band plate is smaller than the inner diameter of the steel column, and a temporary bolt with an inlet on the bolt head side and an outlet in the middle is inserted. The gist of this method is to fill the gap between the band plate and the steel column around the bolt with resin through the temporary bolt, then remove the temporary bolt, and screw in the main bolt that fastens the joining hardware.

[Effect]

According to the present invention as set forth in claim 1, since the outer diameter of the closed cross-section band plate is smaller than the inner diameter of the closed cross-section steel column, it can be inserted relatively easily from the end opening of the steel column. It can be placed at the height of the upper and lower flanges of the steel beam so that it goes around the inner circumference of the steel column.

In addition, since the area around the bolts is filled with resin in the gap between the band plate and the steel column, the band plate is fixed with this resin, and the bolts can be tightened firmly, thereby preventing the band plate from wobbling. .

According to the present invention as set forth in claim 2, in order to obtain the joint structure as set forth in claim 1, resin injection and filling can be performed simply and reliably.

〔Example〕

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

Fig. 1 is a cross-sectional plan view showing one embodiment of the joint structure between a closed-section steel column and a steel beam according to the present invention, and Fig. 2 is a vertical cross-sectional side view of the same, which is the same as Fig. 4 showing the conventional example. Components are given the same reference numerals.

That is, the basic configuration is the same as the conventional example, and the heights of the upper and lower flanges of the steel beam 2 are adjusted so that the band plate 3 having a closed cross section is wound around the closed cross section steel column 1 made of a rectangular steel pipe. A split tee 4 serving as a joining hardware is bolted to the outer circumferential surface of the steel column 1 via the band plate 3.

In order to improve the strength, the band plate 3 is provided with a reinforcing partition 3a inside.

In the present invention, the outer diameter of the band plate 3 is smaller than the inner diameter of the steel column 1, and when the centers of the two are aligned to form a concentric shape, a gap 5 is formed between them.

Then, the gap 5 between the band plate 3 and the steel column 1 around the main bolt 6 that fixes the split tee 4 to the outer peripheral surface of the steel column 1 is filled with a resin such as epoxy resin 7.

Note that other resins may be used as long as they are cured resins that have adhesive properties equivalent to those of the epoxy resin 7.

Further, it is not necessary to fill the entire gap 5 between the band plate 3 and the steel column 1, and it is sufficient to fill only the area around the main bolt 6.

In this way, the band plate 3 is fixed with resin such as the epoxy resin 7 in the gap 5 with the steel column 1, and the main bolt 6 can be firmly tightened, and as a result, the band plate 3 is prevented from becoming loose. can be prevented.

Next, the method of the present invention for obtaining the bonded structure will be explained.

Figures 3a to 3c show the procedure.The bolt has an inlet 8a on the head side and an outlet 8b in the middle, and the outer periphery of the part where the outlet 8b is located is covered with a flexible rubber membrane. Use temporary port l-8 surrounded by 9.

When setting the band plate 3 inside the steel column l, the temporary bolt 8 is inserted as shown in FIG. 3a.

Next, as shown in FIG. 3b, the injection port 8 of the temporary bolt 8 is opened.
When liquid epoxy resin 7 is injected through a, the epoxy resin 7 comes out from the spout 8b in the gap 5 between the band plate 3 and the steel column 1, and expands the rubber membrane 9.

Then, as shown in FIG. 3c, after the epoxy resin 7 has hardened, the temporary bolt 8 is removed and the main bolt 6 is re-screwed.

Note that the rubber film 9 is thin and breaks when the epoxy resin 7 hardens and the temporary bolt 8 is pulled out.
depart from.

In this way, by filling the gap 5 between the band plate 3 and the steel column 1 with the epoxy resin 7 via the temporary bolt 8, it is possible to easily fill the appropriate amount around the bolt without using any large-scale equipment. can do.

〔Effect of the invention〕

As described above, the joint structure and connection method between a closed road type steel column and a steel beam according to the present invention involves arranging a band plate with a closed cross section inside the steel column, and connecting the ends of the steel beam through the band plate. In the joint structure between a closed-section steel column and a steel beam, in which joint hardware is bolted to the outer circumferential surface of a closed-section steel column, a band plate can be easily set inside the steel column without wobbling, and the band plate can be used to secure the joint from the beam. The stress can be transmitted smoothly to the entire column.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view showing one embodiment of the joint structure between a closed road type steel column and a steel beam according to the present invention, Fig. 2 is a longitudinal cross-sectional side view of the same, and Figs. 3a to 3c are FIG. 4 is a longitudinal sectional side view of a main part showing the procedure of the joining method, and FIG. 4 is a longitudinal sectional side view showing a conventional example. 1... Closed road type steel column 2... Steel beam 3... Band plate 3a.
...Reinforcement partition 4...Split tee 5...Gap 6...Bolt 7...Epoxy resin 8
...Temporary bolt 8a...Inlet 8b...Outlet 9...Rubber membrane

Claims (2)

[Claims] (1) A closed-section steel column and a steel beam in which a closed-section band plate is placed inside the steel column, and the joint hardware at the end of the steel beam is bolted to the outer circumferential surface of the closed-section steel column through the band plate. In the joint structure, the outer diameter of the band plate is smaller than the inner diameter of the steel column, and the gap between the band plate and the steel column around the bolt is filled with resin. Joint structure with steel beams. (2) In the method of joining closed cross-section steel columns and steel beams, in which the steel beams are joined by bolting joining hardware to the outer peripheral surface of the closed-section steel column, a closure smaller than the inner diameter of the steel column is installed inside the steel column. Arranging a cross-sectional band plate, inserting a temporary bolt with an injection port on the bolt head side and a spout in the middle, filling the gap between the band plate and the steel column with resin through the temporary bolt, A method for joining a closed cross-section steel column and a steel beam, characterized in that the temporary bolt is then removed and a permanent bolt is screwed in to fasten the joining hardware.