Seismic performance evaluation of traffic load-viaduct interaction system and development of safety countermeasures

建立了交通荷载对公路、铁路和单轨高架桥地震反应影响的分析方法，并对车辆和列车的运行安全性进行了研究。桥梁-列车/车辆相互作用系统的地震响应首次在线性结构行为范围内进行模拟，非线性地震分析方法也在发展之中。分析了交通荷载对桥梁动力响应的影响。研究了土体和地震动特性对桥梁地震反应的影响。指出了在桥梁抗震设计中正确考虑交通荷载的动力效应的重要性。

An analytical approach to evaluate the dynamic effect of traffic loads on seismic responses of roadway, railway and monorail viaducts is established and the running safety of vehicles and trains is investigated. Seismic responses of the bridge-train/vehicle interaction system are firstly simulated within linear structural behaviors, and the non-linear seismic analytical approach is also under development. Dynamic effects of traffic loads on bridge response are analytically examined. Influences of soil and ground motion characteristics on seismic responses of bridges are also investigated. The importance of considering properly the dynamic effect of traffic loads in the seismic design of bridges is indicated.