Friction type self-resetting cast-in-place beam column joint

Abstract

The invention relates to a friction type self-resetting cast-in-place beam column joint. The friction type self-resetting cast-in-place beam column joint comprises a weakened reinforced concrete beam, a reinforced concrete column and self-resetting friction type connecting pieces; and the weakened reinforced concrete beam and the reinforced concrete column are connected through cast-in-place, and the self-resetting friction type connecting pieces are additionally arranged in two weakened areas on the upper side and the lower side of the end of the weakened reinforced concrete beam. The friction type self-resetting cast-in-place beam column joint has the following beneficial effects that the damage mode of strong column and weak beam is realized by weakening the beam end, the damage is mainly concentrated on the replaceable self-resetting friction type connecting pieces at the beam end, and the internal force requirement of adjacent beam components is reduced; and energy consumption design, resetting design and replaceable design are integrated, the structural energy consumption can be increased through variable friction force, the structural damage can be reduced, self-resetting can be realized by utilizing the elasticity of a disc spring, residual deformation is reduced, periodic replacement of vulnerable components can be realized through full-bolt connection, and post-earthquake repair is facilitated.

Description

technical field [0001] The invention belongs to the technical field of reinforced concrete structures, and relates to a friction-type self-resetting cast-in-place beam-column joint that is easy to repair quickly after an earthquake and has both reset capability and energy consumption capability. Background technique [0002] As a common natural disaster, earthquake poses a serious threat to economic and social development and people's life and property safety. The traditional reinforced concrete structure is often difficult to appear the damage mode of "strong column weak beam" after the earthquake, the node area is severely damaged, and the residual deformation is relatively large. Due to the particularity of the damage location and the severity of the damage, some components are difficult to reinforce and repair, and the repair The time is long, the cost is high, and it is difficult to take into account the economy. [0003] In recent years, the theory of seismic design b...

AI Technical Summary

Problems solved by technology

When designing nodes, on the basis of reset design, additional energy dissipation design and shear design are required. The design is relatively scattered, the structure form is relatively complex, and the construction accuracy is high. At the same time, the prestress will inevitably be lost, which may affect the node performance

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