结构工程师2017，Vol.33Issue(2)：103-108,6.
桥墩裂纹对铁路桥梁结构振动及行车性能影响分析
Influence of the Pier Crack on the Dynamic Response of the Railway Bridge and Train Operation
摘要
Abstract
The finite element model is used to simulate a railway bridge before and after pier crack.Then,the vehicle-bridge interaction analysis is used to study the dynamic response of the bridge and the operation security of the train.The research shows the lateral stiffness of the pier top is reduced by about 15 percent after the pier crack,and the reduction of the natural frequency of the bridge is within 3 percent.The lateral amplitude of the pier top is increased by about 10 percent during the passage of C62 trains and the quasi-high-speed trains,which is smaller than the value in the code.The derail factor and load reduction rate of the trains vary insignificantly after the pier crack,which also meets the requirement of the code.Related measures can be conducted to enclosure the crack on the pier,and no further reinforcement measures or train speed limit are needed.关键词
铁路桥梁/桥墩开裂/桥梁振动/行车性能Key words
railway bridge/pier crack/bridge vibration/train operation performance引用本文复制引用
何志辉,喻建云,宋晓东,吴定俊..桥墩裂纹对铁路桥梁结构振动及行车性能影响分析[J].结构工程师,2017,33(2):103-108,6.基金项目
国家自然科学基金项目(51608116) （51608116）
江苏省自然科学基金项目(BK20160681) （BK20160681）
