基于玻璃珠-砂垫层的岩土隔震系统隔震效果影响因素分析  

Analysis on influencing factors of isolation effect of geotechnical seismic isolation system based on glass bead-sand cushion

作　　者：尹志勇 孙海峰 景立平[2,3] 董瑞 徐琨鹏 YIN Zhiyong;SUN Haifeng;JING Liping;DONG Rui;XU Kunpeng(School of Civil and Architecture Engineering,Hunan University of Arts and Science,Changde 415000,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Key Laboratory of Earthquake Disaster Mitigation,Ministry Emergency Management,Harbin 150080,China;Zhuhai Engineering Investigation Institute of Guangdong Province,Zhuhai 519000,China)

机构地区：[1]湖南文理学院土木建筑工程学院,湖南常德415000 [2]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [3]地震灾害防治应急管理部重点实验室,黑龙江哈尔滨150080 [4]广东省珠海工程勘察院,广东珠海519000

出　　处：《地震工程与工程振动》2022年第5期237-248,共12页Earthquake Engineering and Engineering Dynamics

基　　金：湖南文理学院博士科研启动项目(21BSQD39);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)。

摘　　要：应用低成本的减隔震技术是降低农村民居地震灾害风险的途径之一。岩土隔震(GSI)技术是近年来提出的新隔震概念,基于玻璃珠-砂垫层的岩土隔震系统(GSI-GBSC)的隔震有效性已通过大型振动台试验进行了验证。为了更好地推广GSI-GBSC系统在农村民居中应用,文中在振动台试验的基础上利用ABAQUS有限元软件建立了场地-隔震层-结构有限元模型,对GSI-GBSC系统的隔震效果影响因素进行了探讨,结果表明:砂垫层密实度越小、砂垫层越厚,GSI-GBSC系统的隔震效果越好;回填砂土的密实度和宽度的变化对GSI-GBSC系统隔震效果的影响不大;GSI-GBSC系统隔震效果受基底摩擦系数的影响较大,基底摩擦系数越小,隔震效果越好。在GSI-GBSC系统的隔震效果影响因素分析讨论的基础上,指出了进一步提高GSI-GBSC系统的隔震效果的途径,为进一步推动GSI-GBSC系统在农村民居中的应用奠定了理论基础。The application of low-cost seismic mitigation and isolation technology is one of the ways to reduce the earthquake disaster risk of rural buildings.Geotechnical Seismic Isolation(GSI)technology is a new isolation concept proposed in recent years.The isolation effectiveness of Geotechnical Isolation System based on Glass Bead-Sand Cushion(GSI-GBSC)has been verified by large-scale shaking table test.In order to better popularize the application of GSI-GBSC isolation system in rural buildings,based on shaking table test,the finite element model of site-isolation layer-structure is established by using ABAQUS finite element software,and the influencing factors of isolation effect of GSI-GBSC isolation system are discussed.The results show that the smaller the compactness of sand cushion and the thicker the sand cushion,the better the isolation effect of GSI-GBSC isolation system.The changes of compactness and width of backfill sand have little effect on the isolation effect of GSI-GBSC isolation system.The isolation effect of GSI-GBSC isolation system is greatly affected by the base friction coefficient.The smaller the base friction coefficient,the better the isolation effect.Based on the analysis and discussion of the factors affecting the isolation effect of GSI-GBSC isolation system,the ways to further improve the isolation effect of GSI-GBSC isolation system are pointed out,which lays a theoretical foundation for further promoting the application of GSI-GBSC isolation system in rural buildings.

关 键 词：玻璃珠-砂垫层 岩土隔震 隔震效果 数值模拟 农村民居 

分 类 号：TU43[建筑科学—岩土工程]