铁道科学与工程学报2017，Vol.14Issue(4)：669-674,6.
地震作用下桥梁-CRTSⅡ型无砟轨道相互作用规律
The embedded CRTSⅡslab ballastless track in interaction with bridges under seismic action
摘要
Abstract
Taking the 16-32 m simply-supported bridges and CRTSⅡ slab ballastless track system on Shanghai-Kunming high speed railway as an example, a 3D dynamic simulation model fully considering the nonlinear constraints among track structure layers was established to study the influence of seismic action on the interaction between CRTSⅡ track and bridge. The force and deformation laws of key components under ElCentro wave and Taft wave were studied. Besides, the influence of three different intensities of ElCentro wave on the dynamic response of the system was compared. As revealed, the dynamic response of the system is closely connected with the spectral characteristic of seismic wave. ElCentro wave has a relatively big influence on the longitudinal force and deformation. During the earthquake, rail, pier and anchor bear relatively large longitudinal force. The peak values of the displacement in fastener, sliding layer and mortar layer all appear near the beam crevice. The maximum longitudinal displacement of fastener and mortar layer appears near the anchor. The longitudinal slipping of sliding layer can improve the anti-seismic property to a great extent. The force and deformation increase greatly with the increase intensity of earthquake.关键词
简支梁/无砟轨道/梁轨相互作用/地震响应Key words
simply-supported bridge/ballastless track/bridge-track interaction/seismic response分类
交通工程引用本文复制引用
刘施,闫斌,张鹏飞,林智均..地震作用下桥梁-CRTSⅡ型无砟轨道相互作用规律[J].铁道科学与工程学报,2017,14(4):669-674,6.基金项目
中央高校基本科研业务费专项资金资助项目(2016zzts400) （2016zzts400）
国家自然科学基金资助项目(51608542) （51608542）
