摘要
土与混凝土接触面的反向剪切性质是土木工程中一个重要的课题。根据接触面反向单剪试验结果,定量分析了正向剪切历史对不同含水率接触面反向抗剪强度、摩擦角、黏聚力等因素的影响,给出了相关的经验公式。提出了接触面临界正向剪切比的概念。根据改进的应力应变方程,建立了接触面正反向剪切模量公式,其包含了10个土体参数,均可通过接触面试验求得。确定了该公式中各参数的取值方法,推荐了初步的取值范围。进行了不同正向剪切比情况下的接触面剪切应力应变模拟,得到良好的模拟效果。研究成果可供相关的工程设计参考。
Negative shear property of soil-concrete interface is one critical issue in civil engineering.According to negative simple shear tests of soil-concrete interfaces with various water content,quantitative analysis on changes of shear strength,friction angle and cohesion force of negative sheared interface against positive shear experience were conducted.Several empirical formulae were proposed for above changes,and critical positive shear ratio was put forward.Based on improved stress-strain equation,mathematical model for tangent modulus of negative sheared soil-concrete interface was established.This new model consists ten parameters which can be determined by simple shear test.Process for determining these ten parameters was presented,and empirical values of them were obtained.Simulations for stress-strain curves of soil-concrete interface were carried out,and good ability of the model was found.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第1期59-64,共6页
Journal of Civil,Architectural & Environment Engineering
基金
浙江省自然科学基金项目(Y1080839)
国家自然科学基金委员会(50639050)
关键词
土与混凝土接触面
本构模型
反向剪切
临界正向剪切比
含水率
soil-concrete interface
constitutive law
negative shear
critical positive shear ratio
water content
