Seismic cable restrainer design method to control the large-displacement response for multi-span simply supported bridges crossing fault rupture zones
Seismic cable restrainer design method to control the large-displacement response for multi-span simply supported bridges crossing fault rupture zones
复制标题
控制跨断层破裂带多跨简支桥梁大位移响应的地震索约束器设计方法
DOI：
10.1016/j.soildyn.2021.106881
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发表时间：
2021-10
影响因子：
4
通讯作者：
Wang Jingquan
中科院分区：
文献类型：
--
作者：
Zhang Fan;Li Shuai;Zhao Taiyi;Wang Jingquan
以往的地震都突出了跨断层多跨简支(FC-MSSS)桥梁由于桥面大位移而产生的地震易损性。对于FC-MSSS桥梁，约束装置成本低，安装方便，是一种潜在的防止桥梁大位移或坠落的方法。然而，目前的限制器设计准则不能为MSSS桥梁中考虑断层诱发永久地面错位的此类限制器提供合适的设计方法。为解决这一问题，本研究旨在提出一种FC-MSSS桥梁的约束设计方法。在此过程中，根据基于线性化两自由度分析模型的反应谱分析和桥梁的准静态分析相结合的方法来设计限制器。以海南铺前湾一座跨越铺前-青兰断裂的五跨简支桥中国为研究对象。考虑了弹性钢和超弹性形状记忆合金(SMA)索两种类型的约束件用于跨越断层的桥梁。使用混合模拟方法生成了30多个具有不断增加的永久地面位移的合成地面运动。数值研究表明，该方法设计的限制器能有效地将跨越桥梁的相对位移控制在设计者指定的范围内。与弹性钢索相比，使用SMA拉索作为抗震约束可以显著缩短所需长度。
Previous earthquakes have highlighted the seismic vulnerability of fault-crossing multi-span simply supported (FC-MSSS) bridges due to the large displacement of decks. Restraining devices, being of low cost and easy to install, can be a potential alternative to prevent the large displacement or falling of bridge spans for FC-MSSS bridges. However, the current restrainer design guidelines cannot provide an appropriate design method for such restraining devices in MSSS bridges accounting for the effect of faulting-induced permanent ground dislocation. To address this issue, this study aims to propose a restrainer design procedure for FC-MSSS bridges. In this proposed procedure, the restrainers are designed according to the combination of response spectrum analysis based on a linearized 2-degree-of-freedom (2-DOF) analytical model and quasi-static analysis of the bridge. A five-span simply supported bridge crossing Puqian-Qinglan fault, which is located in Puqian Bay in Hainan, China, is chosen as a case study. Two types of restrainers, i.e., elastic steel and superelastic shape memory alloy (SMA) cables, are considered for the fault-crossing bridge. Over 30 synthetic ground motions with increasing permanent ground dislocations are generated using a hybrid simulation approach. Numerical studies show that the restrainers designed by the proposed method could efficiently limit the relative displacement within a designer-specified value for the fault-crossing bridges. Using SMA cables as seismic restrainers could noticeably reduce the required length compared with elastic steel cables.
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影响因子：
2.6
作者：
B. Shrestha;H. Hao;N. H. Ibrahim;K. Bi
通讯作者：
B. Shrestha;H. Hao;N. H. Ibrahim;K. Bi
影响因子：
3
作者：
G. Mavroeidis;C. M. Scotti
通讯作者：
G. Mavroeidis;C. M. Scotti
影响因子：
3
作者：
Y. Hisada
通讯作者：
Y. Hisada
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
I. Buckle;I. Friedland;J. Mander;G. Martin;R. Nutt;M. Power
通讯作者：
I. Buckle;I. Friedland;J. Mander;G. Martin;R. Nutt;M. Power
DOI：
--
发表时间：
1993-05
期刊：
--
影响因子：
--
作者：
M. Saiidi
通讯作者：
M. Saiidi