圆截面均匀配筋抗滑桩裂缝控制
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李乾南1,熊宗海2(1 武汉冶金建筑研究院, 武汉 430081; 2 中国地质大学工程学院, 武汉 430074)[摘要]钢筋混凝土抗滑桩必须进行裂缝控制,这与保证足够强度一样重要。抗滑桩属受弯构件,为了使《混凝土结构设计规范》(GB 50010—2010)裂缝宽度计算公式适用于圆截面均匀配筋受弯构件,在分析公式的各个相关因素之后,通过调整它的系数和修改它的参数(σs,ψ,ρte),得出了圆截面均匀配筋受弯构件的裂缝宽度计算公式,构建了一个函数表以简化计算过程。实例的裂缝宽度计算结果表明,建议的方法是简便、合理和可行的。[关键词]圆截面;均匀配筋;抗滑桩;裂缝宽度中图分类号:TU473.1 文献标识码:A 文章编号:1002-848X(2013)08-0074-04Crack control of reinforced concrete antisliding piles with circular section for uniform reinforcingLi Qiannan1, Xiong Zonghai2(1 Wuhan Research Institute of Metallurgical Construction, Wuhan 430081, China; 2 Faculty of Engineering, China University of Geosciences, Wuhan 430074, China)Abstract: The crack of reinforced concrete anti-sliding piles must be controlled, which is important as well as strength assurance. Anti-sliding piles are flexural elements. In order to make the crack-width formula in Code for design of concrete structures(GB 50010-2010) be applied to crack control of reinforced concrete flexural elements with circular section for uniform reinforcing, after analyzing its each relative factors, the crack-width formula of flexural elements with circular section for uniform reinforcing was presented by adjusting its coefficient and modifying its parameters (σs, ψ, ρte). The function table for simplifying calculation was also given. The result of crack width calculated in the practical examples shows that the advised method is simple, reasonable and feasible.Keywords: circular section; uniform reinforcing; antisliding pile; crack width参考文献[1]GB 50010—2010 混凝土结构设计规范[S]. 北京:中国建筑工业出版社, 2011.[2]滕智明. 裂缝宽度计算[R]. 北京:清华大学土木工程系, 1985.[3]《钢筋混凝土结构设计规范》修订组. 钢筋混凝土构件裂缝宽度计算[J]. 建筑结构, 1984,14(3):21-25.[4]李扬, 侯建国. 国内外混凝土构件裂缝控制安全度设置水平的比较[J]. 建筑结构, 2011,41(2):124-127.[5]《建筑结构静力计算手册》编写组. 建筑结构静力计算手册[M]. 北京:中国建筑工业出版社, 1978.[6]王清湘, 李树瑶. 钢筋混凝土构件裂缝宽度计算理论模式的应用和简化[J]. 工业建筑, 1986(2):6-10.[7]胡人礼.桥梁桩基设计[M].北京:人民铁道出版社,1976.