随着城市桥梁不断并入多种交通形式，各种交通工具与行人之间相互干扰，对行人行走的安全与舒适均产生影响。为研究公铁平层桥梁上的行人响应，建立了行人-汽车-列车-桥梁耦合振动模型。对比分析了桥面板加速度与行人SMD（spring-mass-damp）模型的差异，计算了列车、汽车以不同的方式通过桥梁时的行人响应。结果表明，相较于桥面板加速度，行人SMD模型加速度的波动幅度更小，但行走的行人模型会出现突变的远大于波动区间的加速度峰值。行人-汽车-列车系统中各子系统均存在速度敏感区间，该区间内行人加速度响应显著增加。汽车与列车离桥梁中心线越远，引起的行人加速度响应越大。列车与汽车同时行驶通过桥梁时，二者引起的行人的加速度峰值会相互叠加，列车对汽车引起的行人加速度的峰值提升显著。

With the continuous integration of urban Bridges into a variety of traffic forms, various traffic vehicles and pedestrians interfere with each other, affecting the safety and comfort of pedestrians. To research the pedestrian response on single-level rail-cumroad bridges, a pedestrian-road vehicle-train-bridge coupling vibration model was established. The acceleration difference between the bridge panel and pedestrian SMD model was researched, and the influence of trains and road vehicle passing the bridge in different ways on pedestrians was calculated. The results show that, compared with bridge panel, the amplitude of acceleration fluctuation of pedestrian SMD model is smaller, but the walking pedestrian model may experience abrupt and significant acceleration peaks. Each moving subsystem in the coupling model has a speed-sensitive interval, in which the pedestrian acceleration increases significantly. The further vehicles are away from the bridge center, the greater the acceleration of pedestrians become. When train and road vehicle pass the bridge simultaneously, the peak acceleration of pedestrian caused by them will be superimposed, and the peak acceleration caused by road vehicles increases significantly due to the train.