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本文从矩形截面受扭构件承载力的计算公式出发,推出了构件最小纵筋率和最小箍筋率的计算公式,阐明了最小配筋率随纵筋和箍筋的配筋强度比m′值的不同而异,进而从数学上导出了确定最小配筋率时的纵箍筋配筋强度比m′的最佳值。同时在试验的基础上,给出了最小配筋率一m′的试验关系曲线,确定出计算公式中的α值,使理论计算与试验结果符合程度较好。
Based on the calculation formula of the torsion member’s bearing capacity of rectangular section, this paper presents the calculation formula of the minimum longitudinal reinforcement ratio and the minimum reinforcement ratio of the member, and clarifies the ratio of the minimum reinforcement ratio to the reinforcement strength ratio m′ of the longitudinal reinforcement and the stirrup. The difference is different, and further mathematically derived the optimum value of the longitudinal reinforcement reinforcement ratio m’ for determining the minimum reinforcement ratio. At the same time, on the basis of the test, a test relationship curve with a minimum reinforcement ratio of one m′ is given, and the α value in the calculation formula is determined so that the theoretical calculation and the test result are in good agreement.