CAJ | 학술논문

高速铁路高架桥梁很多，跨越公路的桥墩被汽车撞击所引起的振动会影响列车运行安全。利用车-轨-桥耦合动力试验平台，通过模型试验研究了横向撞击力对桥梁及桥上车辆运行安全的影响规律。试验过程中采集了撞击处撞击力时程、桥墩底部动应变、墩顶动位移、墩顶加速度时程，梁1/4，1/2，3/4处的横向动位移和加速度时程，以及车辆的三向车体加速度时程，计算得到桥墩自振频率等振动特性。分析了车桥系统有无撞击力作用时的动力响应，以及撞击力对桥梁及桥上运行车辆的影响规律。结果表明，横向撞击使桥梁的动力响应大幅度增加，并对车辆运行安全有很大的影响。最后根据撞击力时程探讨了瞬态撞击力的等效静力计算方法并验证，为工程设计提供参考。
고속철로고가교량흔다，과월공로적교돈피기차당격소인기적진동회영향열차운행안전。이용차-궤-교우합동력시험평태，통과모형시험연구료횡향당격력대교량급교상차량운행안전적영향규률。시험과정중채집료당격처당격력시정、교돈저부동응변、돈정동위이、돈정가속도시정，량1/4，1/2，3/4처적횡향동위이화가속도시정，이급차량적삼향차체가속도시정，계산득도교돈자진빈솔등진동특성。분석료차교계통유무당격력작용시적동력향응，이급당격력대교량급교상운행차량적영향규률。결과표명，횡향당격사교량적동력향응대폭도증가，병대차량운행안전유흔대적영향。최후근거당격력시정탐토료순태당격력적등효정력계산방법병험증，위공정설계제공삼고。
As the number of elevated bridges of high-speed railway grows,the bad effect of possible collisions between motors and bridge piers on the running safety of trains increases.A model test based on a platform of a vehicle-track-bridge coupled system was performed to analyze the effect laws of the lateral collision force on the bridge and vehicle's running safety.The collision force's time history,dynamic strains at the bottom of piers,dynamic displacement and acceleration time histories on the top of piers,the dynamic displacements at 1/4,1/2 and 3/4 span of the bridge beam,and the three-directional acceleration time histories of the vehicle were collected.The vibration characteristics, such as,pier natural frequencies were calculated.The results showed that the lateral collision greatly increases the dynamic responses of the bridge,it may dramatically affect the running safety of vehicles.According to the collision force time history,the methods calculating equivalent static forces were discussed and verified,they provided a reference for engineering design.