DYNAMIC RESPONSE OF SOFT SOIL DEPOSITS IMPROVED WITH RIGID INCLUSIONS
The present paper describes a numerical model to study the seismic response of a soft or loose soil deposit stiffened with rigid inclusions as an alternative foundation solution. Modelling was performed using a 2D dynamic finite element method in which the relevant construction stages of the rigid inclusions and different types of arrays were studied. According to the numerical results, the main effects of rigid inclusions on the response of soft deposits are small changes in spectral ordinates. These changes are more significant for decreasing inclusion spacing at soil periods larger than 1.5s, or increasing spacing at periods less than 1.5s.These effects are more apparent at the perimeter of the stiffened zone than at its core. Support conditions at the tips and heads of the inclusions have a major effect on the dynamic response. Spectral ordinates increased most notably in the short period range when the inclusion tips were socketed in the lower stiff material, being only the second vibration mode affected.
Rigid inclusion dynamic soil response foundation finite element method
José Luis Rangel-N(u)(n)ez Alonso Gómez-Bernal Jorge Aguirre-González Emilio Sordo-Zabay Enrique Ibarra-Razo
Dept. of Materials, Autonomous Metropolitan University, Mexico City, .Mexico Institute of Engineering, National University of Mexico, Mexico City, Mexico
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）