文献类型：会议论文

英文题名：Study on Mathematical Stress-strain Model of Frozen-thawed Soil Based on Structure Mechanism

作者：Wang Wei[1,2];Yang Lijun[2];Feng Li[2]

机构：[1]Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou, Gansu, Peoples R China;[2]Shaoxing Univ, Dept Civil Engn, Shaoxing, Peoples R China

会议论文集：International Conference on Environment Science and Engineering (ICESE)

会议日期：APR 01-03, 2011

会议地点：Bali, INDONESIA

语种：英文

外文关键词：Frozen-thawed soil; Stress-strain model; Structure mechanism; shear strength

外文摘要：The stress-strain behavior of frozen-thawed soil is a main issue of the frozen soil mechanics. In this paper, the change rules of soft soil shear strength, friction angle, cohesive force and other mechanical parameters were studied. After frozen-thawed cycles, the friction angle of soft soil increases with lower cohesive force, the constitutive property gradually weakened with the nature of transformation from cohesive soil to cohesionless soil. Mathematical characteristics for shear stress-strain curve of frozen-thawed soil are analyzed. Structure mechanism index is presented to indicate the relation between stress-strain curve and soil structure mechanism. The result of this paper is helpful to the numerical analysis and practical engineering design of frozen-thawed soil foundations. (C) 2011 Published by Elsevier B. V. Selection and/or peer-review under responsibility of National University of Singapore.