动力荷载下砂土的本构模型探讨  

Investigation on Constitutive Model of Sand for Cyclic Loading

作　　者：邹离湘[1] 李相崧[2] 

机构地区：[1]深圳大学土木建筑工程学院,深圳518060 [2]香港科技大学土木及结构工程系

出　　处：《深圳大学学报（理工版）》1999年第1期14-19,共6页Journal of Shenzhen University(Science and Engineering)

摘　　要：中密砂在不排水或基本不排水剪切条件下，当应力进入剪胀区时，会出现剪胀硬化反应;当应力到达破坏面且沿破坏面不断地发展时，会产生剪胀破坏.本文提出了一个砂土动力荷载下模拟剪胀破坏的本构框架，编制了计算程序并进行了模拟计算.Medium-to-dense sand sheared under undrained or essentially unbrained conditions shows a dilative hardening response when the stress gets into the dilative zone. When the shress reaches a failure surface and develops along the surface, the dilative shear failure can be observed. This paper presents a constitutive model of sand in medeling this failure mode under cyclic loading, A numerical program and relative numerical simulation have been made for sand sample.

关 键 词：剪胀破坏 偏应力 动力荷载 砂土 本构模型 

分 类 号：TU435[建筑科学—岩土工程]