Shock absorption damping device for bridge cable or suspender

Abstract

The invention relates to a shock absorption damping device for a bridge cable or suspender. The device comprises a sleeve and a shock absorption ring, wherein the sleeve is sleeved on the cable or suspender; a space exists between the inner side wall of the sleeve and the cable or suspender; and the shock absorption ring is made from shape memory alloy and located between the sleeve and the cable (or suspender). In the shock absorption damping device provided by the invention, as the shock absorption ring is made from shape memory alloy which has excellent characteristics such as shape memory effect, super elasticity and the like, the energy consumption performance and great-deformation self-recovery ability of the shock absorption cable (or suspender) device can be enhanced, and a good durability is obtained at the same time. The shock absorption ring is located between the cable (or suspender) and the sleeve to form a damping structure system with the sleeve, thereby improving the vibration damping of the cable (or suspender) and effectively suppressing vibration caused by various excitations. Moreover, the shock absorption damping device also has the advantages of simple structure, long service life and the like, and is convenient to construct and maintain and easy to manufacture and mount.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a vibration damping and damping device used for bridge cables or suspenders. Background technique [0002] As the main stress components of cable-stayed bridges, suspension bridges and long-span arch bridges, the cables (or suspenders) have the characteristics of large flexibility, low internal damping, and wide natural frequency distribution, and are very easy to be excited by wind, wind and rain, and displacement of the supporting end. Vibration occurs below. Existing studies have shown that the vibration mechanism of cables (or booms) is very complex, and can be divided into vortex induced resonance, parametric vibration, buffeting, wind and rain vibration, ice vibration and wake galloping of parallel cables according to different causes. At present, the main means of suppressing the vibration of the cable (or boom) is passive control, and its main meas...

AI Technical Summary

Problems solved by technology

[0003] In my country's engineering practice, two methods are generally used to increase the structural damping of cables (or booms): one is hydraulic dampers, and its main disadvantages are poor durability, poor sealing performance, easy oil leakage, and high maintenance costs. At the same time, the hydraulic damper has a large volume, and it has a negative effect on the bridge landscape when placed on the bridge deck; another way is to use a damping ring made of high-damping rubber material, which has the advantages of simple structure and does not affect the bridge deck landscape. The disadvantage is that it is difficult to adjust the optimization parameters during installation, and the vibration reduction effect is not good

Images