混凝土电导率与应变关系的试验与理论研究  

Experimental and theoretical study on the relation between electric conductivity and strain of concrete

作　　者：吴献[1] 李秀梅 吴勃 刘之洋[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]北京中关村开发建设公司混凝土分公司,北京100093 [3]北京住宅建设总公司房地产开发公司,北京100020

出　　处：《混凝土》2004年第9期6-7,31,共3页Concrete

基　　金：国家自然科学基金资助项目;№50174013及50204003

摘　　要：　导电混凝土具有应力敏感及温度敏感的性质,可作为功能材料使用,适用于混凝土结构(如桥梁、大坝等)的无损自诊断检测、车辆重量及速度的测量、电磁屏蔽、采暖、融雪化冰等领域。其中石墨混凝土的研究还未见报道。为了研究石墨混凝土的力学及电学性能,本文从导电机理和比拟法两方面进行探讨,得到实测出的混凝土变形模量-应变关系上升及下降的走势与电导率-应变关系的走势相一致的原因,以及在损伤情况下电-力可相互比拟的结论,并认为电导率这个本征量比弹性模量更能揭示混凝土材料的损伤。Conductible concrete possesses the property of stress sensitive and temperature sensitive.And it can be used as functional material on the field of undamaged self-diagnostics of concrete structures(such as bridges and dams),measurement of gravity and speed of motor vehicles,electromagnetic screen,heating,snow melting,and so on.The research of graphite concrete has not been reported so far.To study the mechanical and electrical behavior of graphite concrete,two aspects of the mechanism and analogue are discussed.Firstly,find out the reason of the consistent of deformation modulus-strain and electrical conductivity-strain.Secondly,find out that the analogue between electricity and mechanism can be done in the situation of damage.And consider electrical conductivity a better damage variable than deformation modulus.

关 键 词：电导率 比拟 混凝土 应变 变形模量 

分 类 号：TU317.6[建筑科学—结构工程] TU528.59