Indexed by:会议论文

First Author:Wang, M.

Co-author:Yang, Q.,Kong, G. Q.,Luan, M. T.

Date of Publication:2008-01-01

Included Journals:CPCI-S

Document Type:A

Page Number:185-+

Abstract:In order to simulate dynamic behavior of unsaturated soils under transient or cyclic loading induced by earthquake shaking or traffic loads through controlling matric suction, the second development to the static and dynamic universal tri-axial and torsional shear apparatus which had been designed by Dalian University of Technology in China associated with Seiken in Tokyo of Japan was carried out. The improved apparatus can reproduce complex stress conditions and stress paths and can be used to perform various experimental tests of unsaturated soils with different dry density and different controlled suction under complex consolidation conditions, which is more extensively applicable than the original apparatus. Using this improved apparatus, dynamic tri-axial tests for unsaturated silty clay with different matric suction were performed under 100, 200 and 300 kPa net confining pressures, and then the maximum dynamic elastic modulus E-dmax and the skeletal curve of dynamic stress sigma(d) versus dynamic strain epsilon(d) can be obtained by analyzing and processing test data. It was demonstrated obviously that the improved static and dynamic universal tri-axial and torsional shear apparatus for unsaturated soils can be perfectly used to study dynamic behavior of unsaturated soils by net confining stress and matric suction controlling, and that the maximum dynamic elastic modulus Ed(max) and the skeletal curve of sigma(d)similar to epsilon(d) are affected significantly by net confining stress (sigma(3) - u(a)) and matric suction (u(a) - u(w)).

Translation or Not:no