Experimental Verification of a Cable-Stayed Bridge Model Using Passive Energy Dissipation Devices
Experimental Verification of a Cable-Stayed Bridge Model Using Passive Energy Dissipation Devices
复制标题
使用被动消能装置的斜拉桥模型的实验验证
DOI：
10.1061/(asce)be.1943-5592.0000966
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发表时间：
2016-12-01
影响因子：
3.6
通讯作者：
Li, Jianzhong
中科院分区：
文献类型：
--
作者：
Xu, Yan;Wang, Ruilong;Li, Jianzhong
摘要为了研究被动耗能装置在高强度地震动作用下保护斜拉桥免受严重破坏的效率，设计、建造了一座典型中跨混凝土斜拉桥的1/20缩尺桥梁模型，并进行了振动台试验。在横向和纵向分别采用屈服钢阻尼器（YSD）和粘滞流体阻尼器（VFD）作为被动耗能装置。然后，桥梁模型分别在横向和纵向上受到两种具有不同谱特征的地震动的激励，包括集集地震波和场地特定的人工波。分析比较了设置被动装置前后桥梁模型的地震反应。数值计算和试验结果均表明，横向加YSD能有效地减小塔的地震反应，纵向加VFD能有效地减小塔的地震反应。
AbstractTo investigate the efficiency of passive energy dissipation devices in protecting cable-stayed bridges from severe damage when subjected to high-intensity ground motions, a 1/20-scale bridge model from a typical medium-span concrete cable-stayed bridge was designed, constructed, and tested on shake tables. Yielding steel damper (YSD) and viscous fluid damper (VFD) were used as passive energy dissipation devices in the transverse and longitudinal directions, respectively. The bridge models were then excited by two ground motions with different spectral characteristics in transverse and longitudinal directions accordingly, including the Chi-Chi earthquake wave and a site-specific artificial wave. The seismic responses of the bridge models with and without the passive devices were analyzed and compared. Both numerical and test results show that the YSD applied in the transverse direction could reduce the seismic responses of the towers effectively, and the VFD applied in the longitudinal direction co...