基于OpenSees平台的SMA被动阻尼器及其在斜拉桥减震中的应用  

Control on nonlinear seismic response of cable-stayed bridge using SMA damper based on OpenSees

作　　者：李惠[1] 刘金龙[1] 马赫[1] 欧进萍[1,2] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]大连理工大学土木水利学院,大连116024

出　　处：《计算力学学报》2009年第3期374-378,400,共6页Chinese Journal of Computational Mechanics

基　　金：973计划(2007CB714204);国家科技支撑计划(2006BAJ03B06)资助项目

摘　　要：基于OpenSees平台编制形状记忆合金SMA(Shape Memory Alloys)可恢复材料的本构关系模型,并将其加入OpenSees材料库;提出一种SMA阻尼器,并将其安装在斜拉桥桥塔与主梁之间,通过数值分析研究SMA阻尼器初始刚度、屈服后刚度以及卸屈比变化对其减震性能的影响;进一步对比不同体系斜拉桥的破坏模式,分析SMA阻尼器对斜拉桥抗震性能的改善,以及SMA阻尼器对斜拉桥残余变形的自恢复效果。Shape memory alloys （SMA） are materials with recoverable property. The software of stressstrain relationship of SMA is written and added into material library in OpenSees. A SMA damper with special configuration, which guarantees the SMA wires in damper being elongation regardless of motion direction, is proposed and incorporated into the bridge between the deck and tower. A parametric analysis of seismic response of the bridge with SMA damper under near-fault earthquake ground motion is conducted. Furthermore, the seismic response and failure modes of the cable-stayed bridge with three kinds of connecting configurations are investigated and compared with each other. The effects of SMA damper on the reduction of maximum seismic response and the control of residual deformation are verified.

关 键 词：SMA阻尼器 OPENSEES 斜拉桥 抗震 残余变形 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]