【作者】 秦权； 楼磊；

【Author】 Qin Quan;Lou Lei;

【机构】 清华大学；

【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RC桥塔,使得其阻尼分布不均匀而具有非经典阻尼性质,导致主坐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,用经典阻尼法无法得出可靠的解。更多还原

【Abstract】 Modern supension bridges generally consist of steel stiffening deck and RC towersand 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 three methods to solve 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 methods without consideration of the non-proportional damping can not give reliable results of seismic responses of suspension bridges.更多还原