岩土力学2018，Vol.39Issue(1)：112-122,11.DOI:10.16285/j.rsm.2017.0482
胶结结构性土统一硬化模型
A unified hardening model considering bonding in structured soils
祝恩阳 1李晓强2
作者信息
- 1. 北京航空航天大学 航空科学与工程学院,北京100191
- 2. 北方工业大学 土木工程学院,北京100144
- 折叠
摘要
Abstract
Structured soils with interparticle bonding have higher shearing ultimate stress ratio and less free dilatancy than the corresponding reconstituted soils.To overcome this defect,a moving critical state line (MCSL) in stress space is presented based on the structured unified hardening (UH) model mainly considering soil structure collapse.By developing new yield functions and modifying dilatancy equation,the structured UH model is extended to be applicable for bonding structured soil.In stress space,MCSL parallels to the traditional static critical state line (CSL) and moves toward the CSL as structure decays.The extended model adds 1 new parameter,namely the initial bonding stress,to describe initial bond between particles.Comparisons between test data and predictions of 4 structured soils indicate that the extended model is qualified in describing the behaviors of the bonding structured soils in isotropic compression,drained and undrained triaxial compression.关键词
结构性土/胶结/移动临界状态线/本构模型/统一硬化模型Key words
structured soil/bonding/moving critical state line/constitutive model/unified hardening (UH) model分类
建筑与水利引用本文复制引用
祝恩阳,李晓强..胶结结构性土统一硬化模型[J].岩土力学,2018,39(1):112-122,11.
