弹塑性钢阻尼器用于大跨度CFST拱桥的减震控制研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (12) : 116-121.

论文

弹塑性钢阻尼器用于大跨度CFST拱桥的减震控制研究

王浩周锐程怀宇宗周红

作者信息 +

Research on seismic response control of long-span CFST arch bridge with Elastic-Plastic steel damper

Wang Hao Zhou Rui Cheng Huaiyu Zong Zhouhong

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文章历史 +

摘要

弹塑性钢阻尼器具有良好的减震效果，但目前的研究和应用主要集中在房建领域。本文以主跨368m的茅草街大桥为研究对象，进行了弹塑性钢阻尼器用于大跨度钢管混凝土拱桥地震响应的减震控制研究，采用非线性时程分析法进行了阻尼器关键参数的敏感性分析，研究了不同屈服荷载、不同弹性刚度及不同空间布设阻尼器的减震效果，最后重点分析了行波效应对弹塑性钢阻尼器减震效果的影响。结果表明，对于该中承式钢管混凝土系杆拱桥，弹塑性钢阻尼器的减震效果明显；综合考虑各部位的地震响应，在主梁各支承间均匀布设阻尼器为最佳布置方式；考虑行波效应后，阻尼器的减震效果更佳。

Abstract

Elastic-Plastic steel damper (EPSD) has good control effect, but the current researches and applications of this type of damper mainly concentrated on the building structures. Maochaojie bridge, a half-through concrete-filled steel tubular (CFST) arch bridge with a main span of 368m is taken as an example in this paper. The control effect of Elastic-Plastic steel damper on seismic response of the bridge is investigated. The parametric sensitivity of damper is calculated based on nonlinear time-history analysis. These parameters include yield loads, elastic stiffness and different space locations of dampers. The influence of traveling wave effect on control efficiency of EPSD is especially investigated at last. Results show that the control effect of EPSD is prominent for the long span CFST arch bridge. Evenly distributing the dampers on bearings of girder is the best arrangement when all of the seismic responses of key section are considered. The control effect of damper is more obvious after considering traveling wave effect.

导出引用

王浩周锐程怀宇宗周红. 弹塑性钢阻尼器用于大跨度CFST拱桥的减震控制研究[J]. 振动与冲击, 2013, 32(12): 116-121

Wang Hao Zhou Rui Cheng Huaiyu Zong Zhouhong. Research on seismic response control of long-span CFST arch bridge with Elastic-Plastic steel damper[J]. Journal of Vibration and Shock, 2013, 32(12): 116-121