运行列车引起高层建筑物振动的试验研究及数值分析

EXPERIMENTAL STUDY AND NUMERICAL ANALYSIS OF MOVING TRAIN INDUCED VIBRATIONS ON HIGH-RISE BUILDINGS

通过现场试验和数值分析的方法对运行列车引起的铁路线附近高层建筑物振动特性及其影响因素进行了研究。结果表明:列车引起的建筑物振动属于低频振动,且在软土场地上产生的振动比在硬土场地上的大;建筑物的振动水平随楼层的上升呈曲折分布,楼板的竖向振动大于横向振动;各楼层的振动随列车速度的提高而增大;货物列车因其荷载较重引起的振动比客车大;建筑物整体刚度的变化会对楼层的振动产生影响,且对竖向振动的影响比横向要复杂;距离轨道中心线越近,建筑物楼板的振动就越大。

Using experiments and numerical analysis, the vibration characteristics and influencing factors of high-rise buildings induced by moving trains are studied. The results show that the structural vibrations are of low-frequency characteristic; and higher vibrations are induced for buildings on soft subsoil than those on rigid subsoil. The structural vibrations show zigzag tendencies with an increase in floor elevation, and the vertical vibrations of floors are higher than the horizontal ones. Higher train speed induces larger structural vibrations, and heavier freight trains induce greater vibrations than lighter passenger trains. The entire stiffness of a building affects the floor vibrations, which is more complex on vertical vibrations than horizontal ones. The closer a building is to the track, the larger the structural vibrations would be.