岩土工程学报2025，Vol.47Issue(10)：2015-2025,11.DOI:10.11779/CJGE20240868
考虑循环软化的非线性界面本构模型研究
Research on nonlinear constitutive model of interface considering cyclic softening
摘要
Abstract
A zero-thickness interface constitutive model that considers cyclic softening and nonlinearity is proposed.Firstly,large-scale cyclic shear tests are conducted on the sand-steel interface to obtain the exponential softening law of strength parameters under cyclic shear tests.A cyclic softening equation considering a coupling effect of soil relative density and structural roughness is proposed.Secondly,a hyperbolic model incorporating the cyclic softening equation is used as the skeleton curve model to simulate the evolution of the interface from the initial state to the critical state under cyclic loading.Finally,considering the nonlinearity of interface shear,a hysteresis loop model of shear stress-shear displacement is constructed.In addition,empirical formulas for the strength parameters,stiffness parameters,normal stress,relative soil density,and structural roughness of the model are summarized.A newly established model is used to predict experimental results of this paper and existing literature,demonstrating its excellent capability in simulating interface cyclic shear tests.关键词
砂土-钢界面/循环软化/相对密实度/粗糙度/本构模型Key words
sand-steel interface/cyclic softening/relative density/roughness/constitutive model分类
建筑与水利引用本文复制引用
蔡正银,范开放,朱洵..考虑循环软化的非线性界面本构模型研究[J].岩土工程学报,2025,47(10):2015-2025,11.基金项目
国家重点研发计划项目(2023YFB2604200) （2023YFB2604200）
国家自然科学基金项目(52378358,52401336) （52378358,52401336）
江苏省青年基金项目(BK20230125) （BK20230125）
江苏省重点研发计划社会发展项目(BE2023673)This work was supported by National Key Research and Development Program of China(Grant No.2023YFB2604200),National Natural Science Foundation of China(Grant No.52378358 and 52401336),Jiangsu Provincial Youth Fund Project(Grant No.BK20230125),Jiangsu Provincial Key Research and Development Program(Social Development)Project(Grant No.BE2023673). （BE2023673）
