斜坡场地中结构基底橡胶颗粒垫层隔震数值分析  

Numerical analysis of vibration isolation of rubber granular cushion in structural base of slope site

作　　者：王钦 陈臻林[1] 胡潇[1] 黄龙 Wang Qin;Chen Zhen-lin;Hu Xiao;Huang Long(School of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学环境与土木工程学院,四川成都610059

出　　处：《工程抗震与加固改造》2021年第4期112-118,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(41572288)。

摘　　要：为研究斜坡场地中结构基底橡胶颗粒垫层隔震效应,本文主要针对斜坡场地中土-结构相互作用下(SSI)不同橡胶颗粒垫层厚度的隔震效应进行数值模拟,并与平地场地上数值模拟结果进行对比分析。进一步研究了不同激励作用下橡胶垫层的隔震效应和不同频率正弦波对框架的影响。获得了橡胶颗粒垫层不同厚度和地震波不同频率对隔震效应的影响规律。研究表明:斜坡场地对地震波具有高程放大效应,但在基础底部设置橡胶颗粒垫层后,基础底部的加速度峰值明显降低,基底橡胶颗粒垫层隔震效果明显。In order to study the isolation effect of rubber granular cushion on structural basement in slope site,the numerical simulation on the isolation effect of the different thickness of rubber granular cushion under soil-structure interaction( SSI) is carried out,and the results are compared with the numerical simulation results on flat site. The isolation effect of rubber cushion under different excitation and the influence of sinusoidal wave of different frequency on frame are studied. It is preliminarily concluded that with the increase of cushion thickness under SSI,the shock isolation effect of rubber particle cushion also gradually improved. The research shows that the slope site has an elevation amplification effect on seismic waves,but after the rubber particle cushion is provided at the bottom of the foundation,the acceleration peak at the bottom of the foundation is significantly reduced,and the isolation effect of the base rubber particle cushion is obvious.

关 键 词：斜坡场地 橡胶颗粒 隔震效应 数值模拟 

分 类 号：TU352.1[建筑科学—结构工程]