砂垫层隔震性能的试验研究  

An experimental study of isolating properties of sand cushion

作　　者：窦远明[1] 刘晓立[2] 赵少伟[1] 刘稚媛[1] 

机构地区：[1]河北工业大学土木工程学院,天津300132 [2]华北航天工业学院,河北廊坊065000

出　　处：《建筑结构学报》2005年第1期125-128,共4页Journal of Building Structures

基　　金：河北省建设厅科技项目(2002-104)。

摘　　要：本文通过室内模型试验,以刚体试块代替刚度较大的砌体建筑物,进行了振动台的模拟试验,探讨了三种工况下,砂垫层减振的减振率,研究了砂垫层相对密实度对减振率的影响,比较了在密实状态及松散状态下、较密实状态下两种不同厚度、不同基底压力下砂垫层的减振效果。结果表明,随着砂垫层密实度的增加,减振效果有所减小。输入ElCentro波时,砂垫层厚度增加,减振效果增强,但输入正弦波时,厚度对减振效果影响不大。With rigid test block in place of low building with larger rigidity, the simulated test on shaking table for studying the vibration reduction effect of sand cushion and the effect of relative density of sand cushion on vibration reduction ratio were carried out. Damping effects of sand cushion with two different thicknesses and under different foundation pressure were compared with dense state, loose state and closely dense state. The result showed that the damping effect reduces when the compactness of sand cushion increases. While inputting the El Centro wave, the damping effect enhances as the thickness of sand cushion increases. But when inputting sine wave, thickness has little influence on the damping effect.

关 键 词：砂垫层 相对密实度 隔震 减振效果 砌体建筑 基底压力 振动台 松散 室内模型试验 试验研究 

分 类 号：TU352[建筑科学—结构工程] TU472