摘要
我国建设了四座大跨悬索桥。现代悬索桥多使用钢加劲梁和钢筋混凝土桥塔，使得其阻尼分布不均而具有非经典阻尼性质，导致主座标系的运动方程耦联。本文讨论了非经典阻尼系统运动方程的几种解法，并编制了通用软件。对青马桥和虎门桥的地震分析表明，非经典阻尼对悬索桥地震反应有明显影响，用经典阻尼解法无法得出可靠的解。
Modern suspension bridges generally consist of steel stiffening deck and RC pylons and piers, that makes damping unequally distributed in complete bridges.This non-proportional damping induces coupled equations of motion of bridges in the normal coordinates.This paper discusses the for methods of solving the coupled-by-damping equations of motion and their implementation on PC computers. Seismic analysis of Tsing Ma and Humen bridges show that the non- proportional damping significantly influences seismic responses of suspension bridges, and the methods without consideraion of the non-proportional damping can not give reliable results of seismic responses of suspension bridges.
出处
《土木工程学报》
EI
CSCD
北大核心
1999年第3期17-22,共6页
China Civil Engineering Journal
关键词
非经典阻尼
瑞雷阻尼
悬索桥
地震反应
non-proportional damping, Rayleigh damping, Suspension bridge, seismic response
