机敏混凝土结构梁变形测量时的温度补偿  

Temperature compensation during measuring the deformation in smart concrete structure beam

作　　者：郑立霞[1] 宋显辉[1] 李卓球[1] 

机构地区：[1]武汉理工大学理学院工程结构与力学系,湖北武汉430070

出　　处：《混凝土》2004年第9期8-9,17,共3页Concrete

基　　金：国家自然科学基金重点项目资助(项目批准号50238040)

摘　　要：　碳纤维增强混凝土(CFRC)既有很好的应变-电阻敏感性(压敏性),又有温度-电阻敏感性(温敏性),将其用于交通监测和结构健康诊断时,这两种效应会耦合在一起,给判断造成困难。本文根据构件的变形特点和CFRC的功能特性,合理地敷设CFRC,利用测电阻的四电极法和差动原理成功地实现了机敏混凝土结构梁变形测量时的温度补偿。从理论和试验两方面验证了这一点,为机敏混凝土结构实际应用提供一些新的思路。Carbon fiber reinforced cement (CFRC) not only possesses superior deformation-resistance sensitivity (strain sensitivity),but also possesses superior temperature-resistance sensitivity (temperature-sensitivity).When CFRC is used for traffic monitoring and health monitoring of structures,the coupling of the two effects makes accurate measure very difficult.In this paper,according to the deformation condition at different parts and the function character of CFRC,CFRC is laid selectively,method of four probes and differential principle are employed,and finally,temperature compensation during measuring the deformation in smart concrete structure beam is attained successfully.This approach was verified theoretically and experimentally in this paper,providing some new ideas for practical application of smart concrete structures.

关 键 词：碳纤维增强混凝土 应变敏感性 温度敏感性 温度补偿 

分 类 号：TU528.01[建筑科学—建筑技术科学]