Experimental and numerical verification on effects of inelastic tower links on transverse seismic response of tower of bridge full model
Experimental and numerical verification on effects of inelastic tower links on transverse seismic response of tower of bridge full model
复制标题
非弹性塔杆对桥梁全模型塔横向地震反应影响的试验与数值验证
DOI：
10.1016/j.engstruct.2018.12.046
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发表时间：
2019-03
影响因子：
5.5
通讯作者：
Sun Limin
中科院分区：
文献类型：
--
作者：
Xie Wen;Sun Limin
本文旨在验证非弹性塔杆在单向均匀地震激励下对特大跨度斜拉桥塔身横向地震反应的抑制作用。设计了中心跨度为1400 m的超大跨度斜拉桥的1/70比例全桥模型，并在振动台阵上进行了试验。桥梁全模型包括上部结构、桩群和放置在层流剪切箱中的人工土。采用非弹性塔杆作为牺牲杆方案，在两塔轴之间的横向顶部区域安装。分析比较了有和不含非弹性塔杆的桥梁全模型在横向各种均匀地震激励下的动力特性和地震反应。试验结果表明，在斜拉桥塔架上加装非弹性连杆，提高了斜拉桥的抗震性能，降低了斜拉桥塔架的抗震要求，包括位移响应和应变响应。特别是，非弹性塔杆显著降低了塔顶区域的应变响应。结果表明，在高震区，非弹性塔杆可以调节塔体的地震反应，减轻塔体的地震损伤。此外，利用OpenSees建立了更新的有限元模型来复制实验结果，并对全桥模型进行了数值模拟。结果表明，数值计算结果与实验结果吻合较好，从而验证了更新有限元模型的有效性和准确性。
This paper aims to verify the effects of inelastic tower links on mitigating the transverse seismic response of towers for super long-span cable-stayed bridges under unidirectional uniform earthquake excitations. A 1/70-scale bridge full model of a preliminary design super long-span cable-stayed with a central span of 1400 m was designed and tested on a shaking table array. The bridge full model included superstructure, pile groups and artificial soil placed in laminar shear boxes. Inelastic tower links used as sacrificial links scheme were installed in the top region between both tower shafts in the transverse direction. The dynamic characteristics and seismic responses of the bridge full model with and without the inelastic tower links were analyzed and compared under various uniform earthquake excitations in the transverse direction. The experimental results show that the addition of inelastic links to the tower improves the seismic performance of the cable-stayed bridge, and the tower seismic demands are reduced, including the displacement and strain responses. Especially, the inelastic tower links significantly decrease the strain responses in the tower top region. It is indicated that the inelastic tower links can tune the seismic response and mitigate the seismic damage of towers in high seismic regions. Moreover, an updated finite element (FE) model was conceived to replicate the experimental results using OpenSees, and the numerical simulations of the bridge full model were performed. Consequently, the numerical results are in good agreement with the experimental counterparts, thus validating the effectiveness and accuracy of the updated FE model.
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影响因子：
3.6
作者：
M. Ashour;H. Ardalan
通讯作者：
M. Ashour;H. Ardalan
DOI：
10.1115/1.3140679
发表时间：
1999-03
期刊：
--
影响因子：
--
作者：
G. Sabnis;H. G. Harris;Richard N. White;Saeed Mirza;R. Klingner
通讯作者：
G. Sabnis;H. G. Harris;Richard N. White;Saeed Mirza;R. Klingner
影响因子：
4.5
作者：
A. Camara;Roberto Cristantielli;M. Astiz;C. Málaga‐Chuquitaype
通讯作者：
A. Camara;Roberto Cristantielli;M. Astiz;C. Málaga‐Chuquitaype
DOI：
10.1061/(asce)0733-9445(1988)114:8(1804
发表时间：
1988-08-01
期刊：
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
影响因子：
--
作者：
MANDER, JB;PRIESTLEY, MJN;PARK, R
通讯作者：
PARK, R
DOI：
--
发表时间：
1990
期刊：
--
影响因子：
--
作者：
F. Stahl;S. Weissman
通讯作者：
F. Stahl;S. Weissman