文献类型：期刊文献

英文题名：Numerical study of pile group effect on the hydrodynamic force on a pile of sea-crossing bridges during earthquakes

作者：Wu An-jie Yang Wan-li

第一作者：吴安杰

通信作者：Wu, AJ[1]

机构：[1]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[2]Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Sichuan, Peoples R China

第一机构：贵州理工学院土木工程学院

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：2020

卷号：199

外文期刊名：OCEAN ENGINEERING

收录：;EI(收录号：20200608141453);Scopus(收录号：2-s2.0-85078988351);WOS:【SCI-EXPANDED(收录号:WOS:000518873800030)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant No.51678491) and the Startup Project for High-level Talents of Guizhou Institute of Technology (Grant No. 0203001019008). The authors wish to thank the three anonymous reviewers for comments on the manuscript.

语种：英文

外文关键词：Pile group effect; Fluid-structure interaction; Numerical method; Earthquake; Wave; Current

摘要：Pile group effect is crucial for correct estimation of the hydrodynamic force on a pile within a pile-group foundation of sea-crossing bridge during earthquakes unlike the case of single isolated pile. A numerical calculation model considering fluid-structure interaction under the combined loads of earthquakes, waves and currents is established, based on the second development on ANSYS software. A detailed analysis of pile group effect in the earthquake-induced oscillatory flow field, is carried out by the presented method that is validated in advance. Pile group effect in the earthquake-current combined flow field, as well as in the earthquake-wave combined flow field are further discussed. Pile group effect has almost disappeared when relative spacing S/D = 4.5 and all piles behave like a single isolated pile in terms of earthquake-induced hydrodynamic forces, yet, in the coexistence field, the range of S/D influencing pile group effect has been expanded due to the presence of current and wave. For a sea-crossing bridge foundation, Pile group effect coefficient K is equal to 0.69, implying noticeable interference effects, and results show the hydrodynamic force on corner pile is greater than that on centre pile, strengthening section reinforcement pertinently so as to improve overall seismic performance.