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首页> 外文期刊>Magazine of Concrete Research >Behaviour of steel tube reinforced-concrete short bridge columns under cyclic loading
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Behaviour of steel tube reinforced-concrete short bridge columns under cyclic loading

机译：钢管混凝土短桥柱在循环荷载作用下的行为

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摘要

The results of an experimental study focused on the cyclic shear behaviour of steel tube reinforced-concrete (STRC) short bridge columns are presented. Seven STRC column specimens were tested under constant axial load and cyclic-reversed lateral displacement to investigate the effects of the axial load ratio, volumetric stirrup ratio, longitudinal steel ratio, sectional steel tube ratio and shear span ratio. An additional reinforced-concrete (RC) short column was also tested to evaluate the effectiveness of the steel tube at enhancing the column behaviour. Damage progression and failure modes of the specimens are described, along with a detailed discussion on their seismic indexes with regard to shear strength, ductility, stiffness degradation and energy dissipation. The test results demonstrated improved seismic resistance and mitigated damage extent for the STRC specimens relative to the RC counterpart. It was also found that the STRC short bridge columns with rational structural configurations possessed satisfactory deformability, ductility and energy dissipation capacity and can thus be utilised in regions of moderate to high seismicity. Based on the test results, a simplified superimposition model and the corresponding expressions are developed for shear strength prediction of STRC short bridge columns.
机译：给出了针对钢管混凝土短桥柱的循环剪切特性的试验研究结果。对七个STRC柱试样在恒定轴向载荷和循环反向横向位移下进行了测试，以研究轴向载荷比，体积箍筋比，纵向钢比，截面钢管比和剪切跨度比的影响。还测试了另一根钢筋混凝土（RC）短柱，以评估钢管在增强柱性能方面的有效性。描述了样品的破坏进程和破坏模式，并详细讨论了其抗剪强度，延展性，刚度下降和能量耗散的抗震指标。测试结果表明，相对于RC对应物，STRC样品具有更高的抗震性，并减轻了破坏程度。还发现具有合理结构构型的STRC短桥柱具有令人满意的变形性，延展性和能量耗散能力，因此可以在中等到高地震烈度的地区使用。根据试验结果，建立了简化的叠加模型及相应的表达式，用于STRC短桥柱的抗剪强度预测。

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