运行列车对高层建筑结构的振动影响

建立了一种列车-轨道-路基解析分析模型,将钢轨视为竖直平面内支承在Winkler弹性基础上的一根连续的Euler-Bernoulli梁,考虑轮轨接触的影响,推导出单个轮对荷载对地基的作用力,通过迭加方式得到整列车对路基产生的动荷载;在此基础上,选取铁路线附近的某高层建筑,用有限元分析的方法计算了该高层建筑所受到的振动影响;研究了不同车速下不同距离建筑物中不同楼层的振动规律:振动随楼层高度增加具有不同程度增大的趋势;车速越大,建筑物的振动响应也越大;随着到轨道中心线距离的增加,建筑结构的振动逐渐减小。

VIBRATIONS OF HIGH-RISE BUILDINGS INDUCED BY RUNNING TRAINS

In this paper, an analytical model of train-track-subsoil is established. The rail is simulated as an Euler-Bernoulli beam resting on Winkler foundation in the vertical plane, and the load on the subsoil excited by single axle is derived by considering the influences of wheel-rail contact. The dynamic load of the whole train on the subsoil is obtained by means of superposition. On the basis of this model, the vibration influence of running train on a nearby high-rise building is studied by finite element analysis. The vibration characteristics of different floors of the high-rise building with different distance to the railway track and at different train speeds are obtained. The train-induced structural vibrations increase with the increase of floor level and the rise of train speed, but decrease with the distance of the building to the railway track.