预应力混凝土结构裂缝控制及其可靠性分析  

THE CRACK CONTROL AND ITS RELIABLE ANALYSIS OF PRESTRESSED CONCRETE STRUCTURES

作　　者：张德锋[1] 茅振伟 吕志涛[3] 

机构地区：[1]上海建筑科学研究院,上海200032 [2]上海市第二建筑有限公司,上海200080 [3]东南大学土木工程学院,南京210096

出　　处：《工业建筑》2003年第4期28-31,共4页Industrial Construction

基　　金：国家自然科学基金资助项目 (项目批准号:5 99780 0 8)

摘　　要：用基于耐久性要求的设计方法对两榀框架楼面梁按处于低侵蚀及中等侵蚀环境 ,众多种荷载组合进行了配筋计算 ,并用两种方法计算相应的裂缝宽度。对计算结果的统计分析表明 ,两种侵蚀环境下的裂缝开展宽度均满足耐久性的控制要求。因此 ,该设计方法的验算公式与其相应的裂缝控制宽度是相辅相成的 。Under the action of slight and moderate corrosive environments, two frame structures subjected to the action of a lot of load combinations are analyzed. The correspondent crack width is also computed by two methods. The statistical analysis of the calculated results demonstrates that the crack width under two kinds of corrosive environments satisfies the requirements of crack control. Therefore, the checking formula for the designing method is consistent with the crack control width and the designing method is safe and reliable.

关 键 词：预应力混凝土结构 裂缝 可靠性 侵蚀 耐久性 框架结构 配筋 

分 类 号：TU378[建筑科学—结构工程]