冲击荷载下钢纤维混凝土动态本构关系研究  

Study on dynamic constitutive relation of steel fiber reinforced concrete under impact loading

作　　者：张劼[1] 王艳华[1] 葛灿灿 

机构地区：[1]安徽新华学院,土木与环境工程学院,安徽合肥230088

出　　处：《昆明民族干部学院学报》2016年第8期83-85,共3页Journal of Kunming National Cadres Academy

基　　金：地方高校国家级大学生创新创业训练计划（编号：201212216006：201312216010）

摘　　要：本文采用φ75mm大口径SHPB系统分别进行了钢纤维体积率分别为0％、0．75％、1．5％的三种混凝土材料动态实验，得出不同钢纤维含量、不同应变率下的应力一应变关系曲线。其次，在朱-王-唐（ZWT）非线性粘弹性本构模型的基础上，提出了一种依赖于应变、应变率、材料强度影响因子、钢纤维含量影响因子的混凝土材料动态本构模型，通过与实验曲线的模拟，得到相应的材料参数，拟合结果表明采用该本构模型与实验数据吻合较好。Throughφ75mm large-diameter SHPB experimental system, the dynamic compression experiment of steel fiber reinforced concrete with fiber volume ratio of 0%, 0.75% and 1.5% have been carried out. The stress - strain curves with different steel fiber content and strain rates have been drawn. Based on the definition of HJC constitutive strain rate effect, a constitutive model of concrete materials to depend on strain, strain rate, material strength factor, and steel fiber content factor is determined. Through the simulation of the test curve, the material parameters are attained. The fitting results show that the model is in good agreement with the experimental data.

关 键 词：钢纤维混凝土 SHPB 应变率效应 动态本构关系 

分 类 号：TU528.572[建筑科学—建筑技术科学]