钢筋混凝土受弯构件裂缝宽度控制下的钢筋应力  

STRESS OF REINFORCEMENT IN REINFORCED CONCRETE FLEXURAL MEMBERS WITH CONTROLLED CRACK WIDTH

作　　者：卢钦先[1] 胡狄[1] 

机构地区：[1]中南大学土木建筑学院,长沙410075

出　　处：《工业建筑》2008年第4期46-49,共4页Industrial Construction

摘　　要：在分析规范中裂缝宽度计算公式所考虑的影响因素后,通过推导钢筋混凝土受弯构件以限制钢筋应力来实现裂缝宽度控制的方程,结合裂缝宽度限值和影响因素典型取值,得到钢筋应力限值的简化计算公式。只要钢筋应力限值达到要求即可实现裂缝宽度控制,可避免对荷载作用下裂缝宽度的验算。最后比较分析了各种规范的计算结果。After the influencing factors on crack width in reinforced concrete members are analyzed, the formulas to calculate the limited stress of reinforcement to control the crack width are derived, and the succinct formulas of computing allowable stress of reinforcement are put forward by considering the maximum crack width and typical values of influencing factors, also the charts can be made. The control of crack width will be achieved if the stress is less than the allowable value, thus avoid calculating the crack width under service load. An example is used to compare and analysis theoretical results obtained from various codes.

关 键 词：钢筋混凝土受弯构件 裂缝宽度 钢筋应力限值 计算公式 

分 类 号：TU375[建筑科学—结构工程]