Effect of Spiral Reinforcement on Flexural-shear-torsional Seismic Behavior of Reinforced Concrete Circular Bridge Columns
Effect of Spiral Reinforcement on Flexural-shear-torsional Seismic Behavior of Reinforced Concrete Circular Bridge Columns
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DOI：
10.12989/sem.2009.33.2.137
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发表时间：
2009-09
影响因子：
2.2
通讯作者：
A. Belarbi;S. Prakash;Youngkwon You
中科院分区：
文献类型：
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作者：
A. Belarbi;S. Prakash;Youngkwon You
本文研究了钢筋混凝土圆柱在扭转等组合荷载作用下的受力性能。本研究中考虑的主要变量是扭矩与弯矩之比（T/M）以及中、高地震活动性（低、高横向钢筋/螺旋比）的详细程度。本文介绍了七根柱在循环弯剪、循环扭转以及不同水平的循环弯剪扭复合作用下的试验结果。在0.2和0.4的T/M比下测试组合载荷下的柱。采用0.73%和1.32%两种螺旋配筋率对这些柱进行了加固。同样，柱受到纯扭进行了测试，两个螺旋钢筋率为0.73%和1.32%。本研究探讨适当的细部构造、螺旋配筋率的重要性及其对组合荷载下抗扭性能的影响。试验结果表明，由于复合加载的影响，混凝土柱的抗弯和抗扭承载力均有所下降。此外，他们表现出显着的变化，破坏模式和变形特性取决于螺旋钢筋的比例。螺旋配筋率的增加也导致强度和延性的显著改善。
This paper investigates the behavior of reinforced concrete (RC) circular columns under combined loading including torsion. The main variables considered in this study are the ratio of torsional moment to bending moment (T/M) and the level of detailing for moderate and high seismicity (low and high transverse reinforcement/spiral ratio). This paper presents the results of tests on seven columns subjected to cyclic bending and shear, cyclic torsion, and various levels of combined cyclic bending, shear, and torsion. Columns under combined loading were tested at T/M ratios of 0.2 and 0.4. These columns were reinforced with two spiral reinforcement ratios of 0.73% and 1.32%. Similarly, the columns subjected to pure torsion were tested with two spiral reinforcement ratios of 0.73% and 1.32%. This study examined the significance of proper detailing, and spiral reinforcement ratio and its effect on the torsional resistance under combined loading. The test results demonstrate that both the flexural and torsional capacities are decreased due to the effect of combined loading. Furthermore, they show a significant change in the failure mode and deformation characteristics depending on the spiral reinforcement ratio. The increase in spiral reinforcement ratio also led to significant improvement in strength and ductility.