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本文比较了以往试验中采用的几种边界模拟方法 ,认为采用柔性容器的效果较好。结合本试验的实际情况 ,设计制作了一个柔性的模型容器。三次自由场运动振动台试验的结果表明 ,距边界一定距离的测点与土体表层中心测点的反应基本相同 ,说明边界对内部土体的影响很小 ,容器较好地消除了边界效应对土体地震反应的影响 ,土体边界条件模拟的设计是成功的 ,为进行结构 -地基相互作用体系的振动台试验提供了条件。
In this paper, we compared several boundary simulation methods used in the past experiments and found that the use of flexible containers is better. Combined with the actual situation of this experiment, a flexible model container was designed and manufactured. The results of three free-field oscillating table tests show that the response of the measuring point at a certain distance from the boundary to the measuring point at the surface of soil layer is basically the same, which shows that the boundary has little influence on the internal soil and the container can eliminate the boundary effect The soil response to earthquakes and the simulation of soil boundary conditions are successful, which provide the conditions for the shaking table test of the structure-foundation interaction system.