砂土在变形稳定状态的加载弹性模量  

Reloading elastic modulus of sand in deformation steady state

作　　者：夏平心 邵龙潭[2] 邓文 曾飞涛 XIA Pingxin;SHAO Longtan;DENG Wen;ZENG Feitao(School of Urban Construction,Changzhou University,Changzhou 213164,China;Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]常州大学城市建设学院,江苏常州213164 [2]大连理工大学工程力学系,辽宁大连116024 [3]东南大学土木工程学院,江苏南京211189

出　　处：《常州大学学报(自然科学版)》2025年第2期82-92,共11页Journal of Changzhou University:Natural Science Edition

基　　金：国家自然科学基金青年科学基金资助项目(42407215);常州市领军型创新人才引进培育资助项目(KYZ23020054)。

摘　　要：基于砂土在常规的循环三轴试验、恒载荷的循环加卸载三轴试验、逐级恒载荷的循环加卸载侧限压缩试验时的变形稳定状态,重新准确评估了弹性模量,并提出了砂土在加载过程中的加载弹性模量经验模型。加载弹性模量对应力状态的依赖性可以由轴向应力表示,加载弹性模量对孔隙比的依赖性采用修正的Hardin模型表示。加载弹性模量和常用弹性模量之间存在显著差异,但随着围压的增大和孔隙比的减小彼此间的差异逐渐减小。In this study,the elastic modulus is re-evaluated accurately based on the deformation steady state of sand in conventional cyclic triaxial test,cyclic triaxial test with static load,and stepwise constant load cyclic confined compression test.An empirical model of the reloading elastic modulus of sand during the loading process is proposed.The dependence of the reloading elastic modulus on the stress state can be represented by the axial stress,and the dependence of the reloading elastic modulus on the void ratio is expressed by the modified Hardin model.There is a significant difference between the reloading elastic modulus and the common elastic moduli,but the difference between each other gradually decreases with increasing confining pressure and decreasing void ratio.

关 键 词：加载弹性模量 变形稳定状态 循环载荷试验 砂土 

分 类 号：TU4[建筑科学—土工工程]