不同环境下碳纤维布约束混凝土的受压性能  

Compressive Behavior of Concrete Confined with CFRP Sheets under Different Environmental Conditions

作　　者：张大伟[1] 顾祥林[1] 李翔[1] 张伟平[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2007年第3期65-69,88,共6页Structural Engineers

基　　金：上海市科学技术委员会科研攻关项目(编号:032112060)

摘　　要：在标准养护、自然淋雨、自然不淋雨、淡水浸泡和硫酸盐溶液浸泡5种环境作用下,对碳纤维布约束混凝土试件和非约束混凝土试件进行对比试验分析。每作用一段时间后,取出试件进行单轴受压试验。两年内的试验结果表明,碳纤维布的约束可以有效提高试件的承载能力。在硫酸盐环境下,碳纤维布约束可以改善混凝土的抗腐蚀能力;在其他环境下,约束混凝土也都有良好的耐久性能。不同环境下,碳纤维布约束混凝土的极限应变基本不随时间发生变化。Compressive behavior of plain concrete specimens and specimens confined with CFRP sheets was studied in this paper. After being exposed in different environmental conditions including standard curing, natural rain, natural dry, pure water immersion and sulfate solution for a certain period in two years, specimens were tested under uniaxial compression. It is shown by the results that compressive strength of specimens can be effectively increased by confinement of CFRP sheets. Additionally, the strengthening system forms a barrier and improves the durability of concrete in sulfate or other erosive conditions, ultimate strain of confined concrete under different environmental actions nearly remains constant with time.

关 键 词：碳纤维布 约束混凝土 环境作用 

分 类 号：TU375[建筑科学—结构工程]