文献类型：期刊文献

英文题名：Improving cable-stayed bridge longitudinal aseismic capability via fluid viscous damper parametric optimization and experimental investigation

作者：Wu, Chao He, Xiongjun He, Li Zhao, Xia Wang, Yingang Li, Cong Yang, Yongchao Zhang, Xiuyan

第一作者：Wu, Chao

通信作者：He, L[1]

机构：[1]Wuhan Univ Technol, Sch Transportat & Logist Engn, Wuhan 430063, Peoples R China;[2]Hubei Prov Highway Engn Res Ctr, Wuhan 430063, Peoples R China;[3]Univ Lisbon, CERIS, Inst Super Tecn, Ave Rovisco Pais 1, P-1049001 Lisbon, Portugal;[4]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[5]Binzhou Polytech, Binzhou 256603, Peoples R China;[6]Henan Prov Commun Planning & Design Inst Co Ltd, Zhengzhou 451450, Peoples R China

第一机构：Wuhan Univ Technol, Sch Transportat & Logist Engn, Wuhan 430063, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2023

卷号：57

外文期刊名：STRUCTURES

收录：;EI(收录号：20233814734694);Scopus(收录号：2-s2.0-85171153477);WOS:【SCI-EXPANDED(收录号:WOS:001124018800001)】；

基金：This work is supported by the National Key Research and Development Program of China (No. 2017YFC0806008) , National Natural Science Foundation of China (No. 51178361) , Science and Technology Project of Department of Transportation of Hubei Province (Nos. 2018- 422-1-2, 2022-11-2-8) , Major Project of Technological Innovation of Hubei Province (No. 2018AAA031) , Science and Technology Project of Department of Transportation of Gansu Province (GJJS [2016] No.74) , China Scholarship Council (CSC No. 201906950026) , and the Fundamental Research Funds for the Central Universities (Nos. 2019-YB-015, 2023-vb-009) .

语种：英文

外文关键词：Cable-stayed bridge; Longitudinal aseismic; Fluid viscous damper; Parametric optimization; Model test

摘要：The seismic vulnerability of Cable-stayed Bridges (CSBs) in high-earthquake intensity areas can be of significant concern to structural safety and resilience. A promising design practice for CSBs depends on decoupling the girder from the girder-pylon connection and involving energy dissipation devices such as fluid viscous damper (FVD) to mitigate the seismic responses. However, the parametric damper optimization algorithm and experimental validation on the FVD of a longitudinal aseismic system for CSB is still limited. In this study, three longitudinal aseismic systems (a semi-floating system with an elastic or damper connection, and a pylon girder consolidation system with a rigid connection) were investigated and compared based on the actual bridge Xigu Yellow River CSB erected in Lanzhou, China. The non-linear time history methodology was implemented to analyze the pylon and girder's displacement and internal force responses, and the fluid viscous damper (FVD) aseismic system was the optimal choice considering the oval seismic performances. The optimal damping parameters were obtained by conducting parametrical analysis based on qualitative analysis and non-linear multifunction optimization in the pylon-girder and auxiliary pier-girder connections. A full-scale FVD model was designed and manufactured to conduct low velocity, constitutive law, and damping efficiency tests. The experimental results indicate that FVD achieved good energy dissipation capability and stability. FVD damping parameters were deduced according to the constitutive law test. The optimal analytical FVD damping parameter agreed well with the experimental results. Furthermore, the optimization was implemented in the final bridge design, referencing longitudinal aseismic systems for CSBs.