铁道科学与工程学报2016，Vol.13Issue(11)：2174-2180,7.
考虑轨道约束的重载铁路大跨度连续刚构桥地震响应
Seismic response of large span continuous rigid frame bridges under heavy haul railway considering track restraint
摘要
Abstract
For the study of seismic response law of long span continuous rigid frame bridge and track system in the heavy haul railway,a simulation model for continuous rigid frame bridge and track system considering track restraint under heavy haul railway was established.Taking a 6-32m simply supported beam+(1 08+1 80+1 08)m heavy haul railway continuous rigid-frame bridge +6-32m simply supported beam as an example,the influence of the track constraints and the adjacent bridge span on the self-vibration characteristics was analyzed,and seis-mic response of the system was studied.The influence of the length of the subgrade,the longitudinal resistance and the topography on the seismic response of the system were also studied.The research shows that track re-straint and the adjacent bridge increase the frequency of the system;the seismic response of the system is related to the spectrum characteristics of earthquake;after considering the adjacent bridge,the maximum rail stress,the maximum horizontal force loaded on top and horizontal displacement of pier top increases;with the increase of the length of the subgrade,the maximum value of the stress of the rail increases,and the maximum of the pier horizontal force and horizontal displacement of pier top decreases,and the length of the subgrade should be at least 1 00m;when the rail laying ballastless track the maximum stress value is greater than the laying of ballasted track and small resistance fastener,the horizontal force of pier top and horizontal displacement of pier top is the minimum of the three cases;with the increase of pier height,the horizontal force of pier top increases;the rail stress of coupling effect of earthquake and temperature loads is not equal to the sum of the two separate effects.关键词
重载铁路/轨道约束/相邻桥跨/连续刚构桥/梁轨相互作用/地震响应Key words
heavy haul railway/track restraint/adjacent bridge span/continuous rigid-frame bridge/track-bridge interaction/earthquake response分类
交通工程引用本文复制引用
涂鹏,周文涛,闫斌..考虑轨道约束的重载铁路大跨度连续刚构桥地震响应[J].铁道科学与工程学报,2016,13(11):2174-2180,7.基金项目
高速铁路基础研究联合基金资助项目（U13342023）；中国博士后科学基金资助项目 （）
