铁道科学与工程学报2017，Vol.14Issue(12)：2612-2620,9.
非一致地震输入阻尼对车桥系统地震响应的影响
Effects of non-uniform seismic input damping on seismic responses of train-bridge system
摘要
Abstract
In order to simplify the seismic force input in train-track-bridge coupling system, the seismic force boundary was processed by direct solving method, relative movement method, large mass method and large stiffness method. The formulae of seismic force were deduced and the terms about the seismic speed were defined as the damping term of the input method based on the solving theory of multi-support and multi-dimensional seismic responses. Two kinds of simulation module were programed based on the original program of TTBSAS. As an example, a rigid-continuous combination beam bridge with spans of (48+5×80+48) m, the slab track and the ICE3 high-speed train were modeled. The influence of the damping term on the seismic responses of coupling system under San Fernando seismic wave were calculated and discussed. The results show that ignoring the damping term of relative movement method and large mass method will produce greater influence than the direct solving method and large stiffness method. The influence increases significantly along with the increase of theα named quality damping coefficient. If the damping terms of the relative movement method and large mass method are ignored, the derailment coefficient and wheel unloading rate may be substantially undervalued and the judgment of the running safety may be error. The direct solving method and large stiffness method can only take the seismic displacement as the input, but the relative movement method and large mass method must take the seismic acceleration and seismic speed as the input in train-tack-bridge coupling system.关键词
车桥耦合振动/刚构-连续梁桥/非一致地震输入方法/行车安全性/阻尼项Key words
vehicle-bridge coupled vibration/rigid-continuous beam bridge/input method of the non-uniform seismic excitation/running safety/damping term分类
交通工程引用本文复制引用
雷虎军,黄江泽,李小珍..非一致地震输入阻尼对车桥系统地震响应的影响[J].铁道科学与工程学报,2017,14(12):2612-2620,9.基金项目
国家自然科学基金资助项目(51608120) （51608120）
福建省自然科学基金资助项目(2016J05108) （2016J05108）
福建省教育厅中青年教师教育科研项目(JA15333) （JA15333）
校科研启动基金资助项目(GY-14077) （GY-14077）
