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首页> 外文期刊>Bulletin of earthquake engineering >Shear strength degradation due to flexural ductility demand in circular RC columns
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Shear strength degradation due to flexural ductility demand in circular RC columns

机译：圆形RC柱由于抗弯延性需求而导致的抗剪强度下降

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摘要

An analytical model was developed to estimate the shear-strength degradation and the residual capacity of circular reinforced concrete (RC) columns subjected to seismic action. The proposed model is an upgrade of a previously proposed model for axial force N, bending moment M and shear force V (N-M-V) interaction domain evaluation for rectangular and circular cross-section RC elements subjected to static loading. The model was extended to the case of circular cross-sections subjected to seismic actions with limitation of the range of variability of the deviation angle between the directions of the stress fields and the crack inclinations, as a function of the amplitude of the flexural ductility demand. Numerical evaluation of resistance domains for circular RC columns having the current structural configuration, like bridge piers, highlights the increment in the risk level induced by shear strength degradation due to flexural ductility demand.
机译：建立了一个分析模型，以估算承受地震作用的圆形钢筋混凝土（RC）柱的抗剪强度退化和残余承载力。所提出的模型是先前提出的模型的升级版，该模型针对承受静态载荷的矩形和圆形截面RC元件的轴向力N，弯矩M和剪切力V（N-M-V）相互作用域进行评估。该模型扩展到圆形截面承受地震作用的情况，应力场方向和裂纹倾斜方向之间的偏离角的变化范围受弯曲延性要求幅度的函数限制。对具有当前结构构型的圆形RC柱（如桥墩）的阻力域进行数值评估，突显了由于抗弯延性需求而导致的抗剪强度下降所引起的风险水平的增加。

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