基于界面效应的碳纤维混凝土压敏性研究  

Research on compression sensitivity of carbon fiber concrete based on interfacial effect

作　　者：李卓球[1] 吴菁[1] 宋显辉[1] 朱四荣[1] 

机构地区：[1]武汉理工大学理学院,湖北武汉430070

出　　处：《混凝土》2007年第6期10-12,共3页Concrete

基　　金：国家自然科学基金重点项目资助(10672128)

摘　　要：碳纤维混凝土具有应变-电阻效应,给结构材料赋予了功能特性。运用碳纤维单丝拉拔试验与剪滞理论,从碳纤维-水泥基界面应变变化角度讨论了碳纤维混凝土的压敏性机理。在单丝拉拔过程中,试样电阻的变化主要是因为界面电阻的变化;随着界面应变的增大,试样电阻随之增大。这一研究有助于对碳纤维混凝土压敏性机理的更深入理解。The carbon fiber cement has compression sensibility.Many researches are made on compression sensitivity of cement based materials with the development of cementitious materials and the new request for cement based composite.The compression sensitivity of carbon fiber concrete is analyzed based on shear-lag theory and single fiber pull-out testing on the basis of predecessors＇ researches.The results show that the change in interface resistance plays an important role on the change in resistance.The resistance increases with interracial strain increasing.In the meanwhile, it is shown that the present research provides a comprehensive understanding on compression sensitivity of carbon fiber concrete.

关 键 词：碳纤维 混凝土 应变 压敏性 界面 

分 类 号：TU528.582[建筑科学—建筑技术科学]