钢筋混凝土圆形截面构件截面延性系数计算

Calculation for the cross-section ductile coefficient of reinforced concrete round section members

从钢筋混凝土正截面承载能力计算时的平截面假定、不考虑混凝土抗拉强度、钢筋应力-应变关系为理想弹塑性模型的基本假定出发,建立了圆形截面上各种应力图形的函数表达式。利用曲线积分的数学方法,推导出计算钢筋混凝土圆形截面构件截面延性系数的数学公式,并给出了钢筋混凝土圆形截面在外力作用下截面应力图形形状的判别式,可供圆截面构件进行延性设计时参考。

Based on the basic assumption that the section is plane,the tensile strength of concrete is ignored and the steel stress-strain relationship is the ideal elastic-plastic model while calculating the bearing capacity of the reinforced concrete normal section,function expressions for different stress graphs on the round section were set up.By using the mathematical method of curve integral,the mathematical formulas to calculate the cross-section ductile coefficient of reinforced concrete round section members were derived,and the discriminant of the cross-section stress graphic shape on the reinforced concrete round section under the external force were given,which can provide reference for ductile design of round section members.