Study on Ground Vibration Isolation by Open Trench in Layered Soils

摘要：

　　The fundamental solution of thin layered method (TLM) with quadratic shape function in layered soil is employed in the semi-analytical dynamical BEM to analyze the dynamic interaction of soil-structure.The effectiveness of passive vibration isolation by open trench in upper soft-layer and lower stiff-layer viscoelastic foundations is discussed in detail.The results show that : (i) In upper-soft and lower-hard layered soils in half-plane, the deeper trenches are necessary to meet the same screening effectiveness in homogeneous soils, and the amplitude reduction curve is apparently vibrated.(ii) To satisfy Richarts request of vibration isolation in layered soils, the depth of open trench should be greater than 1.3 when the normalized depth of top soil is less than 1.0.(iii) when normalized depth of top soil is greater than or equal to 1.0 and less than or equal to 2.0, the normalized depth of open trenches should be greater than 1.8, which is quite different from homo geneous elastic foundations.

关键词： TLM semi-analytical dynamical BEM passive vibration isolation open trench

作者: G.Y.Gao H.Zhao J.Song C.B.Yang

作者单位: Department of Geotechnical Engineering, Tongji University, Shanghai, China Key Laboratory of Geotech Institute of Architectural Design, Hefei University of Technology, Hefei, China

会议类型: 国际会议

会议名称: 第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)

会议地点: 上海

会议语种:英文

页码: 454-461

在线出版日期: 2013-11-08（万方平台首次上网日期，不代表论文的发表时间）