A Bridge Damping Control System Combining High Damping Rubber and Shape Memory Alloy

Abstract

The invention discloses a bridge damping control system combing high-damping rubber with shape memory alloy, and belongs to the field of bridge structure damping control. Dampers are mounted on a bridge structure in pairs, and the compression performance of the high-damping rubber and the tensile performance of the shape memory alloy are fully played in the earthquake process; a bidirectional sliding spherical steel support is used for bearing vertical force, the planar size of the support is greatly reduced compared with that of a rubber support, and the durability is good; the axial rigidity of the dampers is adjusted by adjusting the length and diameter of high-damping rubber cylinders, the diameter, winding section number, winding section width and winding section interval of the shape memory alloy, and the diameter, number and pretension degree of shape memory alloy strands, and the axial rigidity demand of the dampers in different positions is met; and the energy consumption damping demands under the action of earthquake force with different strengths and in different directions are met by adjusting the pair number and positions of the dampers. The dampers are subjected to lightweight design, mounting and replacing are simple, and the bridge damping control system is used for damping reinforcement of newly built bridges and old bridges.

Description

technical field [0001] The invention belongs to the field of bridge structure damping control, and relates to a bridge damping control system combined with high damping rubber and shape memory alloy, which can inhibit the structural vibration response of the bridge structure under the action of an earthquake and achieve energy consumption reduction. Shock control effect. Background technique [0002] The energy-dissipating shock-absorbing technology mainly adds dampers or energy-dissipating components to certain parts of the structure to provide a certain additional stiffness and additional damping for the structure, and dissipates the energy input into the structure through the energy-dissipating components under earthquake or wind loads. It is a safe, effective, economical and increasingly mature engineering shock absorption technology to reduce the dynamic response of structures. At present, energy-dissipating shock absorbers mainly include metal dampers, friction damper...

AI Technical Summary

Problems solved by technology

However, the commonly used dampers have certain limitations in engineering applications, such as: steel damper components are bulky, difficult to repair and replace after an earthquake; traditional friction dampers only have a single friction surface, and the energy dissipation effect is not significant; viscoelastic damping Viscous dampers have poor fatigue resistance, are prone to aging, and are prone to severe degradation of mechanical properties including damping characteristics due to environmental influences; viscous fluids in viscous dampers are prone to leakage and difficult to maintain, etc.

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