纤维增强复合材料加固金属管线试验研究与设计分析  

DESIGN AND EXPERIMENTAL STUDY ON METAL PIPELINE STRENGTHENED BY FIBER REINFORCED POLYMERS

作　　者：贾彬[1] 张志伟[1] 陈晓强[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《工业建筑》2013年第7期57-60,51,共5页Industrial Construction

基　　金：四川省教育厅资助项目(12ZB155)

摘　　要：在金属管线外围缠绕不同厚度的碳纤维增强复合材料(CFRP)条件下,通过静水压试验进行纤维增强复合材料加固金属管线承载力测试。试验表明,外围缠绕CFRP材料可使金属管线承压能力增大。结合测试结果,采用薄壁容器应力计算公式,建立金属管道处于弹性、塑性状态加固所需FRP补强层厚度的设计公式,同时,基于厚壁圆筒在极坐标下的弹塑性解,建立修复结构在弹性、塑性状态下FRP加固金属管线的强度校核公式。所建立的设计公式无迭代计算,便于工程应用。This paper presents the results of＇experimental mechanical properties of metal pipeline strengthened by fiber reinforced polymers subjected to hydrostatic pressure. These metal pipelines were wrapped with different layers of CFRP sheets. The results show that the thicker layers of CFRP sheets, the higher the pressure bearing capacity. According to experimental results and thin-walled mechanics theory, the design equation of FRP thickness were set up when the metal pipeline was under elastic or plastic state. Based on the plasticity solution of thick wall cylinder in the polar coordinates, strength checking equation of strengthening structures was presented by different mechanical states. These design equations without iterative calculation are close to the experimental results and can be conveniently applied for actual projects.

关 键 词：纤维复合材料 金属管线 静水压试验 加固 

分 类 号：U174[交通运输工程] TB33[一般工业技术—材料科学与工程]