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两种规范圆形截面构件裂缝宽度计算对比
董攀1,徐其功2,蔡辉3
摘 要
董攀1,徐其功2,蔡辉3
(1 广东省建科建筑设计院,广州 510500;2 广东省建筑科学研究院,广州 510500;3 华南理工大学土木与交通学院,广州 510500)
 
[摘要]以1个混凝土抗拔灌注桩为例,分别按《混凝土结构设计规范》(GB 50010—2010)与《水运工程混凝土结构设计规范》(JTS 151—2011)的裂缝宽度计算公式,在轴向拉力和配筋率变化的情况下,计算该桩的裂缝宽度,并对计算结果进行对比分析。结果表明,水规计算的裂缝宽度较混规计算的裂缝宽度大68%~168%。结合两规范不同的裂缝宽度限值进行比较,得出对于圆形截面构件,水规对裂缝宽度控制要求较混规严格。
[关键词]钢筋混凝土灌注桩;圆形截面;裂缝宽度;轴向拉力;配筋率
中图分类号:TU375      文献标识码:A      文章编号:1002-848X(2013)10-0094-03
 
Calculation comparison on crack width for RC round section members of two codes
Dong Pan1, Xu Qigong2, Cai Hui3
(1 Jianke Architectural Design Institute of Guangdong Province, Guangzhou 510500, China; 2 Guangdong Provincial Academy of Building Research, Guangzhou 510500, China; 3 College of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510500, China)
 
Abstract: Crack width of a reinforced concrete uplift bored pile was calculated and compared in different cases of axial tension and reinforcement ratio, which was based on the calculation formula from Code for design of concrete structures(GB 50010—2010) and Design code for concrete structures of port and waterway engineering(JTS 151—2011) separately. The results show that the crack width calculated by Design code for concrete structures of port and waterway engineering are 68%~168% more than that of Code for design of concrete structures . Different limited values of crack width between two codes were compared, which indicates that calculation formula of crack width of round section members of Design code for concrete structures of port and waterway engineering is more strict than that of Code for design of concrete structures.
Keywords: reinforced concrete uplift bored pile; round section; crack width; axial tension; reinforcement ratio
作者简介:董攀,硕士,工程师,Email:dongpan-828@sohu.com。
 
参考文献
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[4]JGJ 94—2008 建筑桩基技术规范[S].北京:中国建筑工业出版社,2008.
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