钢纤维混凝土力学性能和本构关系研究  

Study on the mechanical properties and constitutive relation of steel fiber reinforced concrete

作　　者：刘永胜[1] 王肖钧[1] 金挺[1] 劳俊[1] 

机构地区：[1]中国科学技术大学力学和机械工程系

出　　处：《中国科学技术大学学报》2007年第7期717-723,共7页JUSTC

基　　金：国家自然科学基金(10402041)资助

摘　　要：利用MTS810和直径为74 mm的大尺寸SHPB实验装置开展了钢纤维混凝土的动静态力学性能实验.实验结果表明钢纤维混凝土是一种具有非常明显的钢纤维增强、增韧效应的应变率敏感材料.根据实验应力应变曲线的基本特征,提出了一种钢纤维混凝土的含损伤本构模型.该模型在考虑钢纤维增强、应变率硬化、损伤软化等因素下,描述了钢纤维混凝土的受力响应特性.The Quasi-static and dynamic mechanical properties of steel fiber reinforced concrete （SFRC） were investigated by MTS and SHPB. The experimental results showed that SFRC is a material with obvious steel reinforcing, toughening, and strain-rate hardening properties. According to the basic characteristics of the experimental stress-strain curves, a damage constitutive model including the effect of steel fiber reinforcing and strain-rate hardening and damage softening was proposed and the stress-strain curves tested prove the effectiveness of the model.

关 键 词：钢纤维混凝土 应变率 本构关系 损伤 

分 类 号：TU528.572[建筑科学—建筑技术科学]