A shake table investigation of dynamic behavior of pile supported bridges in liquefiable soil deposits

作     者：Piyush Mohanty Xu Dan Suryakant Biswal Subhamoy Bhattacharya Piyush Mohanty;Xu Dan;Suryakant Biswal;Subhamoy Bhattacharya

作者机构：CSIR-Central Building Research InstituteRoorkee247667India Fluor Ltd.140 Pinehurst RoadFarnboroughGU147BFUK Institute of Engineering MechanicsChina Earthquake AdministrationSanhe 065201China University of SurreyGuildfordGU27XHUK 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2021年第20卷第1期

页      面：1-24页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：Great Britain China Centre, GBCC China Earthquake Administration, CEA Institute of Engineering Mechanics, China Earthquake Administration, IEM, CEA 

主　　题：bridges midspan failure liquefaction bridge collapse earthquake pile shake table test natural frequency 

摘      要：Bridges are a part of vital infrastructure,which should operate even after a disaster to keep emergency services *** have been numerous bridge failures during major past earthquakes due to *** other categories of failures,mid span collapse(without the failure of abutments)of pile supported bridges founded in liquefiable deposits are still observed even in most recent *** mechanism of collapse is attributed to the effects related to the differential elongation of natural period of the individual piers during liquefaction.A shake table investigation has been carried out in this study to verify mechanisms behind midspan collapse of pile supported bridges in liquefiable *** this investigation,a typical pile supported bridge is scaled down,and its foundations pass through the liquefiable loose sandy soil and rest in a dense gravel *** noise motions of increasing acceleration magnitude have been applied to initiate progressive liquefaction and to characterize the dynamic features of the *** has been found that as the liquefaction of the soil sets in,the natural frequency of individual bridge support is reduced,with the highest reduction occurring near the central *** a result,there is differential lateral displacement and bending moment demand on the *** has also been observed that for the central pile,the maximum bending moment in the pile will occur at a higher elevation,as compared to that of the interface of soils of varied stiffness,unlike the abutment *** practical implications of this research are also highlighted.