A dog-bone joint beam end buckling restraint device

Abstract

The present invention proposes a dog-bone joint beam end buckling constraint device, which includes a restraint cover plate ( 1), the weakened part of the flange corresponds to the restraint channel steel on both sides of the web (2), the filler plate between the restraint cover plate and the restraint channel steel (3), and the connection of the restraint cover plate, restraint channel steel and filler plate Connecting bolts (4) that make up the complete restraint. During an earthquake, the weakened part of the flange at the beam end yields before other parts and members, and the hysteresis characteristic is used to dissipate the seismic energy, and the restraint device can limit the compression of the weakened part of the flange at the beam end and the corresponding web under compression and shearing outside the plane of the steel plate Large-scale buckling that may occur prevents fatigue life reduction at flange weakened parts and joint stiffness and strength degradation, prevents out-of-plane overall buckling of steel beams (7) in the joint area, ensures full hysteretic curves, and improves joint deformation capacity, ductility and beam strength. lateral stability.

Description

Technical field [0001] The present invention belongs to the field of construction engineering, involving steel frame structures, specifically a buckling constraint device applied to steel frame structural dog bone node beam ends. Background technique [0002] my country is an earthquake multiplayer area. With the wide application of steel structures in building structures, it is especially important to study their seismic performance. After the 1994 Northern Earthquake and the 1995 Japanese Hanshi earthquake, people pay more and more attention to the structural forms and seismic properties of the steel structure nodes. Based on the research and analysis of traditional beam column nodes, it has proposed a lot of improvements. Node form, mainly divided into two categories of reinforced and weakened types. In recent years, the dog bone nodes in recent years belong to a weakened new node form. The beam ends that have a certain distance from the beam pillar connection reduce the flang...

AI Technical Summary

Problems solved by technology

The out-of-plane buckling instability of the steel plate that may be produced by the flange and the web may affect the performance of the energy dissipation capacity of the node at the slightest level, reduce the low-cycle fatigue life of the weakened part of the flange, and lead to premature failure of the joint at the worst

Some tests have also shown that the out-of-plane stiffness of the steel beam is reduced because the dog-bone joint weakens the flange section in the joint area, and the overall out-of-plane buckling of the steel beam is prone to occur.

Images