王依群  康谷贻     （天津大学建筑工程学院 300072）

[提要]  从受剪和受纯扭构件最小配筋率入手，通过理论分析，给出了箱形截面剪-扭构件最小配筋率计算公
式，并与实芯截面和规范GB50010-2002计算公式进行了比较。理论分析表明，箱形截面剪-扭构件最小受扭纵筋配筋率宜计及箱形截面的特性。在未作进一步研究前，可偏安全地取与实芯截面相同。
[关键词]  钢筋混凝土  箱形截面构件  扭转  配筋率

From the minimum ratio of reinforcement for the members under shear and pure torsion, through theory analysis, the calculation formula for the minimum ratio of stirrup in the box cross-section members under shear and torsion is presented. It is compared with those in Code for design of concrete structures ( GB50010-2002). The results of theoretic analysis show that the characteristic of box cross-section should be considered in the calculation of the minimum reinforcement ratio of longitudinal bars for box cross-section members under shear and torsion.
Keywords:  RC box cross-section; members; torsion;reinforcement ratio