西南交通大学学报2017，Vol.52Issue(1)：23-29,37,8.DOI:10.3969/j.issn.0258-2724.2017.01.004
行波效应对大跨连续刚构桥易损性影响分析
Fragility Analysis of Large-Span Continuous Rigid Bridge Considering Wave Passage Effectt
摘要
Abstract
To study wave passage effect on the fragility of the large-span continuous rigid bridge (LSCRB) in mountainous area,an actual LSCRB in southwest area was chosen as the study object.Twenty earthquake records were selected using the spectra-compatible method.Then,incremental dynamic analysis (IDA) of the bridge structure was conducted under uniform excitations and non-uniform excitations to obtain the fragility curves.The analysis results show that the relative displacements of the piers increase with the height of piers,and the relative displacement of the highest pier is around 1.03-2.81 times that of low pier,but the seismic design of low piers should be paid more attention because the damage probability of low piers is greater than that of high piers.Compared with the case under uniform excitations,the wave passage effect may reduce the probabilities of slight and moderate damages of low piers,and increase those of high piers.Furthermore the probability of extensive damage may be increased by the wave passage effect both for the low and high piers.As a result,in the seismic design of the high-pier bridges,it is necessary to consider the effect of wave passage on bridge structure,especially for the high-intensity zones.关键词
高墩桥/增量动力分析/行波效应/损伤概率/易损性Key words
high-pier bridges/incremental dynamic analysis/wave passage effect/damage probability/fragility分类
交通工程引用本文复制引用
陈志伟,蒲黔辉,李晰,陈志强,贾宏宇..行波效应对大跨连续刚构桥易损性影响分析[J].西南交通大学学报,2017,52(1):23-29,37,8.基金项目
国家自然科学基金资助项目(51308465,51508473) （51308465,51508473）
中央高校基本科研业务费专项资金科技创新资助项目(SWJTU2014CX037EM) （SWJTU2014CX037EM）
教育部春晖计划资助项目(Z2014032) （Z2014032）
