辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(5)：530-537,8.DOI:10.11956/j.issn.1008-0562.2023.05.003
红黏土-混凝土接触面剪切特性及扰动本构模型
Shear characteristics and shear softening model of red clay-concrete interface
摘要
Abstract
To investigate the stress-displacement characteristics and failure strength of the interface between red clay and concrete structures under different normal stresses,shear tests were conducted using a large direct shear apparatus.The shear process of the contact interface was analyzed based on the perturbation state theory.Building upon the traditional two-parameter Weibull distribution function,a perturbation threshold parameter γd was introduced to develop a constitutive model for the shear perturbation of the contact interface that considers the influence of initial perturbation positions.The model was validated and discussed.The experimental results reveal that the stress-displacement curves of the contact interface exhibites typical shear softening characteristics under various conditions,with both cohesion(c)and internal friction angle(φ)being smaller than those of the red clay alone.The constructed model can effectively predict the shear stress-strain relationship of the contact interface under high normal stresses and large shear displacements.The reasonable range for the perturbation threshold parameter γd was found to be(0.7 to 0.9)times γp(peak shear strain).关键词
接触面/本构模型/应变软化/扰动状态理论/扰动阈值Key words
interface/constitutive model/strain-softening/disturbed state concept/disturbance threshold分类
建筑与水利引用本文复制引用
王崇淦,王晅,张家生,张宇,陈晓斌,成浩..红黏土-混凝土接触面剪切特性及扰动本构模型[J].辽宁工程技术大学学报（自然科学版）,2023,42(5):530-537,8.基金项目
国家自然科学基金项目(51978674) （51978674）
湖南省自然科学基金面上项目(2022JJ30737) （2022JJ30737）
