Self-resetting beam-column anti-seismic joint based carbon fiber disc spring

Abstract

The invention provides a self-resetting beam-column anti-seismic joint based a carbon fiber disc spring. The self-resetting beam-column anti-seismic joint comprises a joint beam, a joint column, a self-resetting unit and an energy consuming unit, the joint beam and the joint column are connected through a bolt, the self-resetting unit tightly abuts against the opposite outer side of the flange ofthe joint beam, is connected with the joint column and comprises a pre-tightening connecting piece and the carbon fiber disc spring, and the pre-tightening connecting piece is arranged on the joint column in a penetrating mode. The pre-tightening connecting piece is sleeved with the carbon fiber disc spring, and then the carbon fiber disc spring is clamped between the pre-tightening connecting piece and the joint column. The energy consuming unit comprises a steel angle and a high-strength bolt, the two faces of the steel angle are attached to the flanges of the joint column and the joint beamcorrespondingly and are fastened through the high-strength bolt in a penetrating mode. When an earthquake occurs, through material yielding of the steel angle, energy consuming is conducted, the carbon fiber disc spring is utilized as the joint to provide large resisting force and restoring force, and thus the joint can still conduct self-resetting after the earthquake.

Description

technical field [0001] The invention belongs to the technical field of anti-seismic technology of structural engineering, and relates to a self-resetting anti-seismic node of a beam-column based on a carbon fiber disc spring. Background technique [0002] Currently, traditional beam-to-column connections provide better strength and ductility under earthquake action. However, large residual deformations will occur under strong earthquakes, which will greatly increase the cost of post-earthquake repairs and even make the structure abandoned. [0003] In order to reduce the residual deformation of structures after earthquakes, there are two currently known techniques: [0004] One way is to use prestressed self-resetting joints, but this kind of prestressed self-resetting joints is difficult to tension and construction, it is easy to cause local buckling of the beam, and there is non-negligible prestress relaxation, and it is also difficult to maintain the joints. [0005] An...

AI Technical Summary

Problems solved by technology

However, this shape memory alloy self-resetting node has a low bearing capacity and is more sensitive to temperature and loading frequency. At the same time, the price of shape memory alloy is relatively expensive, which is not suitable for wide application in practice.

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