钢筋混凝土构件裂缝宽度计算方法 船舶与海洋工程论文.doc
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第26卷第4期 海 洋 r 程 V01.26 No.4 2008年11月 I’HE 0CEAN ENGINEERJN(; NOV.2∞8 文章编号:1005.9865(2008)04-01 1 1.06 钢筋混凝土构件裂缝宽度计算方法 王元战1,赵冲久2,丁 嵬1,一,王 军1(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淦测、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)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《港口工程混凝士结构设计规范》采用的裂缝宽度计算公式提出了改进建议。关键词:钢筋混凝土;裂缝宽度;汁算方法中图分类号:TU375 文献标识码:A Investigation on calculation methods for crack width of reinforced concrete members WANG Yuan.zhanl,ZHAO Chong—jiu2,DING Weil~,WANG Junl(1.Ti酬in Key Laboratory of Harbor&Ocean Engineering,Tianjin University,Ti粕jin 300072,China;2.Laboratory of Coastal EngineeringStructures,Tianjin Researeh Institute of Waler Transport Eflgineering,Tianjin 300456,China;3.China Communications Harming and DesignInstitute for Water Transportation,Beijing 100007,China)Absh翟ct:Crack width talculation iS prineiDal fir the crack control of minforeed concrete members.While the factors that affect concretecracking are nunleFOLkq.there are large differences among the cmck width calculation formulas from different codes.In this paper.the theoriesfor crack width calculatiOil are inmaluced and the main formulas of crock width caleulation are sllmmarized.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 resultsfrom different formulas and the calculation results agree with the experimental”nle.asurements if the load value is low。while the differences of ther器ults from different formulas are large and there is a significant‘埘fer_ence between the calculation results and the experimental measurementsjf the load value is hish.Finally.some for t}le revision of suggestions the Design Code for Harbor Engineefing Concrete Structures are present一一.Key words:reinforced concrete menbe
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