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A calculation method of cracking moment for the high strength concrete beams under pure torsion

机译：纯扭作用下高强度混凝土梁开裂弯矩的计算方法

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In this study, a method is given to calculate cracking moments of high strength reinforced concrete beams under the effect of pure torsion. To determine the method, both elastic and plastic theories were used. In this method, dimensions of beam cross-section were considered besides stirrup and longitudinal reinforcements. Two plain high strength concrete (without reinforcement) and eight high strength reinforced concrete beams which have two different cross-sections (150 × 250 mm and 150 × 300 mm) were produced to examine the validity of the proposed method. The predictions of the proposed approach for the calculation of the cracking moment of beams under pure torsion were compared with the experimental and the analytical results of previous studies. From these comparisons it is concluded that the predictions of the proposed equations for the cracking moment of plain and reinforced high strength concrete beams under pure torsion are closer to the experimental data compared to the analytical results of previous theories.
机译：在这项研究中，给出了一种计算纯扭力作用下高强度钢筋混凝土梁开裂弯矩的方法。为了确定方法，同时使用了弹性理论和塑性理论。在这种方法中，除了箍筋和纵向钢筋外，还考虑了梁截面的尺寸。制作了两根普通高强混凝土（无钢筋）和八根高强混凝土梁，它们分别具有两个不同的横截面（150×250 mm和150×300 mm），以检验该方法的有效性。将该方法在纯扭力作用下的开裂弯矩的计算结果与先前的实验和分析结果进行了比较。从这些比较得出的结论是，与先前理论的分析结果相比，所提出方程对纯高强度钢筋混凝土梁在纯扭转作用下的开裂弯矩的预测更接近于实验数据。

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