TRAIN-INDUCED CYCLIC LOADS IN AN ELASTIC HALF-SPACE

机译：培训诱导的循环载荷在弹性半空中

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To study the train-induced cyclic loads in the elastic half-space, the train-track system-ground interaction problem is simplified as Timoshenko beam on elastic foundation under a series of moving concentrating loads. The dynamic loads on the foundation surface are calculated with the corresponding pseudo-static solution. Ground response is obtained by integrating the basic solution of stresses in elastic half-space under moving point force. Variation of dynamic stresses with space and time coordinate is studied. It is shown that the dynamic stresses in the ground are harmonic-like cyclic loads. They attenuate rapidly with depth but decrease more slowly in the y direction at a deeper depth. Speed has a significant influence on stresses, which differs for different stress components and depends on the speed ratio. Of all the normal stress σ zd is the dominant one, whose influencing range and magnitude are much larger than those of the other two.

机译：为了研究弹性半空间中的火车诱导的循环载荷，在一系列移动的集中负载下，火车轨道系统地面相互作用问题被简化为蒂姆森科梁。基础表面上的动态载荷用相应的伪静态解决方案计算。通过将应力的基本溶液集成在移动点力下的弹性半空间中的基本溶液来获得地面响应。研究了空间和时间坐标的动态应力的变化。结果表明，地面的动态应力是谐波的环状负载。它们随着深度迅速衰减，但在更深的深度时，y方向上的速度更慢。速度对应力产生显着影响，这对不同的应力分量不同，并且取决于速度比。在所有正常应力σZd中的主导之一，其影响范围和幅度远大于另外两个的影响。

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《Asia-Pacific Conference on Shock Impact Loads on Structures》|2003年||共8页
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C.J. Wang; Y.M. Chen; S.Y. Wen;
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中图分类抗震动结构、防灾结构;
关键词
cyclic load; train; timoshenko beam; elastic half-space;

机译：循环载荷;火车;Timoshenko梁;弹性半空间;

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TRAIN-INDUCED CYCLIC LOADS IN AN ELASTIC HALF-SPACE

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