Dynamic Characteristics of Self-anchored Suspension Bridge and Damped Effect
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摘要: 采用时程分析法针对自锚式悬索桥的动力特性进行了试验和理论分析,并分析了非线性黏滞阻尼器对该桥型抗震能力的影响.结果表明,采用梁杆单元建立的悬索桥计算模型可有效地进行结构的地震响应分析,具有良好的可靠性.在主桥纵向设置参数合理的非线性黏滞阻尼器可有效地减小结构在地震作用下控制部位的相对位移,不同程度地改善了结构墩柱部位的地震反应效应,黏滞阻尼器耗能减振效果良好.Abstract: The dynamic characteristics of self-anchored suspension bridges is experimented and analyzed using the way of non-linear dynamic time history.And based on it,the effect of non-linear viscous damper on the shock-resistant capability of this bridge is studied.The results indicated that the calculated model of suspended bridge built by beam and bar elements can be used to the seismic responsive analysis of structure,whose result is reliable.When the non-linear viscous dampers with proper parameters are installed along the lengthwise direction of main bridge,the control regional relative displacement of structure is reduced effectively.The seismic response effect of vital positions is improved to some extent.Meanwhile,these confirm that the viscous damper has good dissipation energy and damped effect too.
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