钢纤维混凝土材料中应力波演化机理及衰减规律研究  

Study on evolution mechanism and attenuation law of stress wave in steel fiber concrete

作　　者：郝英奇[1] 叶中豹 周新贵[1] HAO Yingqi;YE Zhongbao;ZHOU Xingui(Anhui Province Key Laboratory of Building Structure and Underground Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学安徽省建筑结构与地下工程重点实验室,安徽合肥230601

出　　处：《安徽科技学院学报》2023年第1期63-68,共6页Journal of Anhui Science and Technology University

基　　金：安徽省高校自然科学研究重点项目(KJ2019A0745);安徽建筑大学建筑结构与地下工程重点实验室开放基金(KLBSUE-2021-04);安徽省质量工程项目(2019MOOC222)。

摘　　要：目的:探寻钢纤维混凝土矩形杆中冲击波的传播和演化规律,获得典型时刻和典型位置处的应力时程曲线。方法:通过理论推导一维应变杆的基本方程、特征关系,并结合数值模拟分析。结果:因粘塑性效应作用导致冲击波在某些典型时刻、典型位置处,材料的峰值应力呈现指数函数形式衰减。结论:钢纤维混凝土材料适合采用HJC本构模型(Holmquist-Johnson-Cook)。Objective:In order to explore the propagation and evolution law of shock wave in steel fiber reinforced concrete rectangular bar,the stress time history curve at typical time and typical position was obtained.Methods:The basic equations and characteristic relations of one-dimensional strain bars are deduced theoretically and analyzed by numerical simulation.Results:The peak stress of the material decays exponentially at some typical moments and locations due to the visco-plastic effect.Conclusion:It is reasonable to adopt HJC(Holmquist-Johnson-Cook)constitutive model for steel fiber reinforced concrete.

关 键 词：钢纤维混凝土 应力波演化 应力波衰减 

分 类 号：TU3[建筑科学—结构工程]