岩土力学2017，Vol.38Issue(3)：769-774,809,7.DOI:10.16285/j.rsm.2017.03.020
基于统一强度理论的冻结壁弹塑性应力分析
Elastoplastic stress analysis of frozen soil wall based on unified strength theory
摘要
Abstract
The frozen soil wall can be simplified as the functionally graded material (FGM) thick cylinder with parabolic-distributed elastic modulus and cohesion.In consideration of the intermediate principal stress,the analytical solutions of the elastic ultimate load,the elastioplastic stress field and the plastic ultimate load are derived based on the unified strength theory.The results are further compared with that of a homogeneous model,the influence of the parameters of unified strength theory is investigated as well.The results show that the stress distribution of FGM frozen soil wall differs from that of homogeneous frozen soil wall,especially the circumferential stress changes from linear distribution to parabolic distribution.The maximum circumferential stress appears in the central thickness instead of the inner or outer wall.The elastic ultimate load is higher but the plastic limit load is lower than that of homogeneous frozen soil wall.The elastic ultimate load and the plastic ultimate load,the radial stress and the circumferential stress will increase with the increase of the parameters of unified strength theory.The conclusions can provide theoretical reference for the design of frozen soil wall.关键词
冻结壁/功能梯度材料/抛物线分布/统一强度理论/弹塑性分析/极限荷载Key words
frozen soil wall/functionally graded material/parabolic distribution/unified strength theory/elastoplastic analysis/ultimate load分类
数理科学引用本文复制引用
曹雪叶,赵均海,张常光..基于统一强度理论的冻结壁弹塑性应力分析[J].岩土力学,2017,38(3):769-774,809,7.基金项目
国家自然科学基金项目(No.41202191) （No.41202191）
陕西省社会发展科技攻关项目(No.2015SF272) （No.2015SF272）
长安大学优秀博士学位论文培育资助项目(No.310828150018).This study was supported by the National Natural Science Foundation of China (41202191),the Shaanxi Province Social Development of Science and Technology Research Project (2015SF272) and the Chang'an University Cultivation Project of Excellent Doctorial Dissertations(310828150018). （No.310828150018）
