Experimental Study on Tensile Behavior of Cement Paste, Mortar and Concrete under High Strain Rates

作     者：陈徐东 SHAO Yu XU Lingyu CHEN Chen 

作者机构：College of Civil and Transportation Engineering Hohai University 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2015年第30卷第6期

页      面：1268-1273页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Funded by the National Natural Science Foundation of China(No.51509078) the Natural Science Foundation of Jiangsu Province(No.BK20150820) 

主　　题：tensile behavior cement based materials experimental study split Hopkinson pressure bar 

摘      要：Effects of the strain rate on cement paste, mortar and concrete were studied. A modified SHPB testing technique with fl attened Brazilian disc（FBD） specimen was developed to measure the dynamic tensile stress-strain curve of materials. A pulse-shaped split Hopkinson pressure bar（SHPB） was employed to determine the dynamic tensile mechanical responses and failure behavior of materials under valid dynamic testing conditions. Quasi-static experiments were conducted to study material strain rate sensitivity. Strain rate sensitivity of the materials was measured in terms of the stress-strain curve, elastic modulus, tensile strength and critical strain at peak stress. Empirical relations between dynamic increase factor（DIF） and the material properties were derived and presented.