Fabricated rectangular steel pipe joint and design and calculation method thereof

Abstract

A fabricated rectangular steel pipe joint is used for a flat single-layer latticed shell structure composed of rectangular steel pipe members so as to bear a vertical static load and the bending moment outside the plane generated under the earthquake effect. The fabricated rectangular steel pipe joint comprises a main pipe and a branch pipe perpendicularly crossing the main pipe, and the main pipeand the branch pipe have the same section. The middle of the branch pipe is slotted and then the branch pipe is lapped on the main pipe, wherein slotting the middle of the branch pipe means that thebottom flange and a web in the middle of the branch pipe are cut off and the top flange is through so as to form a slot, and an end plate is welded to each of the two ends of the slot. The main pipe penetrates through the slot, and the main pipe and the end plates are connected through bolts on the lower part of the bottom flange of the main pipe and single-side bolts close to the top flange of the main pipe. Transverse stiffening ribs are mounted between the web of the branch pipe and the end plates, and vertical stiffening ribs are mounted between the bottom flange of the branch pipe and theend plates. The invention further provides a design and calculation method of the fabricated rectangular steel pipe joint. The fabricated rectangular steel pipe joint is suitable for the flat single-layer latticed shell structure, and the design and calculation method of the joint is provided.

Description

technical field [0001] The invention relates to the field of civil engineering steel structure design. Based on the basic theory of steel structure connection nodes and steel pipe structures, an assembled rectangular steel pipe node suitable for a single-layer flat reticulated shell and a design calculation method thereof are proposed. Background technique [0002] Steel pipes are common components of long-span building structures such as single-layer reticulated shells. The steel pipe joints (including intersecting joints of steel pipes and the reinforced joints on the foundation) are large One of the commonly used joint forms for spanning building structures. The stress on the joints is complex, and the joints play a key role in ensuring the safety of the structure. Reasonable joints should make the force transmission of the components reasonable and clear, and should also facilitate construction and installation. [0003] The feature that the main pipe runs through and t...

AI Technical Summary

Problems solved by technology

[0003] The feature that the main pipe runs through and the branch pipe is directly welded to the surface of the main pipe after being disconnected at the main pipe makes the steel pipe intersecting joints often have the defects of relatively low bearing capacity and low rigidity. In addition, although most of the welding work is completed in the processing plant, there are still defects. On-site welding is not easy to guarantee the quality of the weld seam

Images