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Non-linear flexural behaviour of RC columns including bar buckling and fatigue degradation

机译:钢筋混凝土柱的非线性挠曲行为,包括钢筋屈曲和疲劳退化

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摘要

An advanced fibre-based modelling technique is developed to characterise the non-linear flexural behaviour of rectangular reinforced-concrete (RC) columns by accounting for the influence of inelastic buckling and low-cycle fatigue degradation of vertical reinforcement. The proposed uniaxial material model of reinforcing steel is calibrated using 22 rectangular RC column tests. The influence of inelastic buckling of vertical reinforcement on the non-linear cyclic response of rectangular RC columns is investigated. The calibrated model is capable of accurately predicting the non-linear response of rectangular RC columns up to complete collapse by taking into account the additional failure modes of the RC columns.
机译:开发了一种基于纤维的高级建模技术,以通过考虑竖向钢筋的非弹性屈曲和低周疲劳退化的影响来表征矩形钢筋混凝土(RC)柱的非线性挠曲特性。建议的钢筋单轴材料模型使用22个矩形RC柱试验进行校准。研究了竖向钢筋的非弹性屈曲对矩形RC柱非线性循环响应的影响。通过考虑RC柱的其他失效模式,该校准模型能够准确预测矩形RC柱的非线性响应,直至完全坍塌。

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