Study on seismic response control of a single-tower self-anchored suspension bridge with elastic-plastic steel damper
Study on seismic response control of a single-tower self-anchored suspension bridge with elastic-plastic steel damper
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DOI：
10.1007/s11431-012-4826-5
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发表时间：
2012-04
期刊：
影响因子：
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通讯作者：
Hao Wang;Rui Zhou;Z. Zong;Chen Wang;Ai-qun Li
中科院分区：
文献类型：
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作者：
Hao Wang;Rui Zhou;Z. Zong;Chen Wang;Ai-qun Li
弹塑性钢阻尼器（EPSD）是一种新型的地震反应控制装置。介绍了EPSD的力学原理，并对阻尼器单元的理论计算公式和有限元模拟结果进行了比较。结合试验，得到了经过验证的阻尼器系统的力-位移滞回曲线。以南京江心洲大桥为工程背景，研究了EPSD对独塔自锚式悬索桥地震反应的控制效果。在ANSYS中建立了该桥的三维有限元模型，对该桥进行了动力和静力分析，并在验证模型的基础上进行了非线性时程分析，进一步研究了EPSD在不同地震波作用下的控制效果。结果表明，简化理论和有限元模拟方法均能较好地反映EPSD的力学性能，且EPSD对NJB的地震反应优于弹性连接装置和流体粘滞阻尼器。但是，EPSD的控制效果受地震波特性的影响。
Elastic-plastic steel damper (EPSD) is a new device controlling seismic responses. The mechanical principle of EPSD was presented and a comparison was conducted between the theoretical formulas and finite element (FE) simulation of damper units. The verified force-displacement hysteretic curve of the damper system was obtained with reference to tests. The Nanjing Jiangxinzhou Bridge (NJB) was subsequently taken as the case to investigate the seismic response control effect of EPSDs on single-tower self-anchored suspension bridges. A 3-dimensional FE model of the bridge was established in ANSYS and the dynamic and static analyses of the bridge were conducted, the control effect of EPSDs under different seismic waves was further investigated through nonlinear time-history analysis based on the validated model. Results showed that both the simplified theoretical and FE simulation methods can preferable reflect the mechanical performance of EPSD, and that seismic responses of NJB with EPSDs are better than those with elastic connection device or fluid viscous damper. However, the control effect of EPSDs is influenced by seismic wave characteristics.