碳纤维增强混凝土中裂纹的红外热像检测方法与机理研究  

Infrared Thermographic Inspection for the Crack in Carbon Fiber Reinforced Concrete

作　　者：黄莉[1] 李卓球[1] 宋显辉[1] 钱红兵[2] 

机构地区：[1]武汉理工大学理学院,武汉430070 [2]武汉华中数控股份有限公司,武汉430074

出　　处：《实验力学》2003年第3期403-408,共6页Journal of Experimental Mechanics

基　　金：国家重点自然科学基金项目资助(50238040)

摘　　要：本文利用碳纤维机敏混凝土的功能特性,采用红外热像无损检测方法检测机敏混凝土构件中的裂纹损伤.该方法利用机敏混凝土的导电性和电热效应,给试样通电造成其裂缝尖端区域与其它正常部位的温差,以及温差所导致的试样表面温度的非均匀分布,借助红外热像仪,通过对试样表面温度的分析对试样内部的裂纹进行无损检测.文中对温差产生的机理也进行了分析.Based on the function characteristic of carbon fiberreinforced concrete, a nondestructive method for detecting the damage in CFRC by using infrared thermograph, is presented. The principle of the method is that when a CFRC specimen is applied by a low voltage, the temperature near the tip of a crack is higher than that in other normal areas for electrothermal effect of the material. By using infrared thermograph, the internal crack can be inspected and located. The mechanism for causing the temperature difference is also analyzed in this paper.

关 键 词：碳纤维增强混凝土 裂纹 红外热像检测 无损检测 机敏混凝土 导电性 电热效应 温差 

分 类 号：TU528.572[建筑科学—建筑技术科学] TU528.07