摘要
应用岩土隔震(GSI)技术是减少农村民居震害的重要途径。基于砂垫层的岩土隔震系统(GSI-SC)已经被证明对上部结构的水平地震反应具有良好的隔震效果。基于此,文中进一步研究了输入地震动对采用GSI-SC系统的农村民居隔震效果的影响,初步探讨了GSI-SC系统对不同频谱特征地震动作用下及竖向地震作用下的隔震效果,结果表明:随着输入加速度幅值增大,GSI-SC系统对结构地震反应的隔震效果也随之增大;输入地震动频谱特征对GSI-SC系统的隔震效果影响较大;对比水平X、Y向输入,GSI-SC系统对结构地震反应隔震效果差别不大;双向输入(水平Y向和竖向)时,对GSI-SC系统水平向的隔震效果影响较小,GSI-SC系统对结构竖向地震反应的隔震效果不明显。
The application of geotechnical seismic isolation(GSI)technology is an important way to reduce earthquake damage of rural residential buildings.It has been proved that Geotechnical Seismic Isolation System based on Sand Cushion(GSI-SC)has good isolation effect on horizontal seismic response of superstructure.Based on that,this study further explores the impact of input ground motion on the isolation effect of the rural residential building with GSI-SC system.Then the isolation effects of GSI-SC system under different spectrum characteristics of input ground motion and vertical earthquake are discussed preliminarily.The results show that the isolation effect of GSI-SC system is increased with the increasing of input acceleration amplitude;the spectrum characteristics of input ground motion have a great impact on the isolation effect of the GSI-SC system.Compared with horizontal input of X and Y,the effect of GSI-SC system on seismic isolation of structure seismic response is not different.Bidirectional input(horizontal Y direction and vertical direction)has little impact on the isolation effect of GSI-SC system in horizontal direction.The seismic isolation effect of the GSI-SC system on the vertical seismic response of the structure is not obvious.
作者
孙海峰
尹志勇
景立平
董瑞
徐琨鹏
SUN Haifeng;YIN Zhiyong;JING Liping;DONG Rui;XU Kunpeng(Zhuhai Engineering Investigation Institute of Guangdong Province,Zhuhai 519000,China;School of Civil and Architecture Engineering,Hunan University of Arts and Science,Changde 415000,China;Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2021年第6期222-230,共9页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局地震科技星火计划攻关项目(XH16010)
中国地震局工程力学研究所基本科研业务费专项资助项目(2017B10)。
关键词
竖向地震动
岩土隔震
振动台试验
隔震效果
农村民居
vertical ground motion
geotechnical seismic isolation
shaking table test
isolation effect
rural houses
