基础下砂垫层隔震性能振动台试验研究

An Experimental Study of Isolating Properties of Sand Cushion Under the Foundation by Shaking Table

通过室内模型试验,以刚体试块代替刚度较大的砌体建筑物,进行了震动台的模拟试验,探讨了不同粒径砂垫层不同厚度下的隔震情况,研究了砂垫层减振的减振率.结果表明:单一粒径比连续级配的砂垫层减振效果好;单一粒径的砂垫层较大粒径的砂垫层减振效果较好;无论何种粒径,随着厚度的增加,减振率有所增加.

Through indoor model test, with rigid test block instead of low building with larger rigidity, this paper studies the different effect under the different size of the sand cushion and the effect of sand cushion to vibration reduction ratio can be gotten. The result shows: The isolating effect of sand cushion of a certain size is more than the continuous one, the big size of the sand is more effective. Whether the certain size or the continuous size, the damping effect enhances as the thickness of sand cushion increases.