SHAKING TABLE TESTS OF DYNAMIC INTERACTION OF SOIL-STRUCTURE CONSIDERING SOIL LIQUEFACTION
Shaking table model tests on soil-structure interaction system in liquefiable ground are described in this paper. A flexible container was fabricated to minimize the box effect. Pile foundation was used in the test. A 12-story cast-in-place R.C. frame model was used as superstructure, and sand soil was employed as model soil. In the tests, macro-phenomena of soil liquefaction and structure failure due to natural earthquake were reproduced well. The natural frequency of interaction system decreased and the damping ratio of soil increased with the increase of the shaking. The liquefied soil could filter and isolated vibration. The phenomena of transient minus pore pressure occurred in the test. Pore water pressure did not always dissipate in short time immediately after the excitations, but it may keep on increasing too. The distribution of the strain amplitude along the pile was the shape where the large strain was at the top of the pile and the small strain was at the tip of the pile. And the distribution of the contact pressure on the pile-soil interface was related to the excitation magnitude.
sand soil liquefaction interaction shaking table test seismic response
Peizhen Li Hongmei Ren Xilin Lu Lei Cheng
Associate Professor,State Key Lab.for Disaster Reduction in Civil Eng.,Tongji Univ.,Shanghai,China PH.D student,State Key Lab.for Disaster Reduction in Civil Eng.,Tongji Univ.,Shanghai,China Professor,State Key Lab.for Disaster Reduction in Civil Eng.,Tongji Univ.,Shanghai,China
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）