圆形截面钢筋混凝土构件裂缝宽度的计算

Calculation of crack width for reinforced concrete members with round section

我国现行的《港口工程混凝土结构设计规范》(JTJ 267-98)没有给出圆形截面钢筋混凝土构件裂缝宽度的计算方法,本文探讨分析了圆形截面钢筋混凝土构件裂缝宽度的计算方法,给出有效受拉钢筋配筋率的计算公式,并在文献[2]的基础上给出进一步简化的钢筋应力计算公式.为保持与现行规范(JTJ 267-98)裂缝宽度计算方法的衔接,裂缝宽度公式采用了现行规范公式的形式.计算结果表明,本文公式计算的裂缝宽度与试验实测裂缝宽度符合较好,可供港口工程混凝土结构设计规范修订参考.

Calculation methods for crack width with round section are not given in the current Concrete Structure Design Code for Harbor Engineering （JTJ 267-98）. This paper discusses the calculation methods. The formulae of effective ratio of tensile steel are established, and based on document [ 2 ] , simplified formulae of steel stress are further developed. In order to keep consistent with the calculation methods for crack width in the current design code （JTJ 267-98） , the formulae of crack width adopt the form of the current code. Calculated results show that the formula is consistent with test results of crack width and can be referred to in the revision of Concrete Structure Design Code for Harbor Engineering