钢筋混凝土构件裂缝宽度计算方法  

Investigation on calculation methods for crack width of reinforced concrete members

作　　者：王元战[1] 赵冲久 丁嵬[1,3] 王军[1] 

机构地区：[1]天津大学建筑工程学院天津市港口与海洋工程重点实验室,天津300072 [2]交通部天津水运工程科学研究院水工构造物检测诊断与加固技术实验室,天津300456 [3]中交水运工程规划设计院有限公司,北京100007

出　　处：《海洋工程》2008年第4期111-116,共6页The Ocean Engineering

基　　金：交通部天津水运工程科学研究院科技开发基金资助项目(TKS07020202);国家自然科学基金资助项目(50579046)

摘　　要：裂缝宽度计算是混凝土裂缝控制的重要内容,由于相关影响因素很多,至今各国规范的裂缝宽度计算公式尚存在不小的差异。文中分析国内外各种裂缝宽度计算理论中的几个代表性公式和有限元方法,通过实例计算对各种裂缝宽度计算公式与有限元方法和实验数据进行比较分析。在荷载水平较低时各种方法的计算结果差异较小,与实验结果也比较吻合;在荷载水平较高时,各种方法计算结果差异较大,与实验结果差异更大。最后,对现行《港口工程混凝土结构设计规范》采用的裂缝宽度计算公式提出了改进建议。Crack width calculation is principal for the crack control of reinforced concrete members. While the factors that affect concrete cracking are numerous, there are large differences among the crack width calculation formulas from different codes. In this paper, the theories for crack width calculation are introduced and the main formulas of crack width calculation are summarized. The formulas of crack width calcu- lation are compared with experimental measurements through an example calculation. It is shown that there is little difference among the results from different formulas and the calculation results agree with the experimental＂ measurements if the load value is low, while the differences of the results from different formulas are large and there is a significant difference between the calculation results and the experimental measurements if the load value is high. Finally, some for the revision of suggestions the Design Code for Harbor Engineering Concrete Structures are presented.

关 键 词：钢筋混凝土 裂缝宽度 计算方法 

分 类 号：TU375[建筑科学—结构工程]