斜拉桥减震控制算法研究  

Research on the Seismic Mitigation Control Algorithm for Cable-stayed Bridge

作　　者：亓兴军[1] 李小军[2] 唐晖[2] 

机构地区：[1]山东建筑大学,济南250101 [2]中国地震局工程力学研究所,哈尔滨150080

出　　处：《铁道工程学报》2008年第7期36-40,共5页Journal of Railway Engineering Society

基　　金：国家科技支撑计划资助重点项目(2006BAC13B02);国家自然科学基金资助项目(50708100)

摘　　要：研究目的:以一座大跨漂浮体系斜拉桥为实例,建立有限元模型进行斜拉桥地震反应半主动控制、主动控制和被动控制计算分析。探讨不同减震控制算法对斜拉桥地震反应控制效果的影响,为实际工程中的斜拉桥减震提出理论上的建议。研究结论:各种减震控制方法并不能使桥梁全部地震反应都能得到控制,而是使得桥梁大部分地震反应减小,同时却放大塔底剪力等另外部分地震反应;8种减震控制算法中,最大阻尼力被动控制算法的减震效果相对最好,半主动界限Hrovat控制算法、主动控制和被动控制没有出现加速度放大效应,而其它半主动控制算法会产生不同程度的加速度放大效应。Research purposes： Take a long - span floating cable - stayed bridge for example, the semi - active control, active control and passive control analysis of seismic responses is performed with the finite element model, The influence of different seismic control algorithms on seismic response control effect of floating cable - stayed bridge is discussed in order to present theoretical advice for actual cable -stayed bridge mitigation. Research conclusions：Seismic mitigation control methods can not make all the seismic responses of bridge less. They make most seismic responses less, but make some other seismic responses larger including bottom shearing force of the bridge tower. Passive control with the most damping force is the best in the 8 control algorithms on vibration - suppressed effectiveness. Semi- active limited Hrovat control algorithm, active control and passive control can not bring acceleration magnified effect, but the other semi - active control algorithms can show acceleration magnified effect with various degrees.

关 键 词：斜拉桥 减震效果 控制算法 加速度放大效应 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]