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A Fracture Energy Based Constitutive Model For The Analysis Of Reinforced Concrete Structures Under Cyclic Loading

机译:循环荷载下钢筋混凝土结构基于断裂能的本构模型

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This paper proposes a constitutive model for predicting the response of reinforced concrete. Of specific interest is the realistic modeling of the hysteretic behavior of concrete under quasi-statically reversed cyclic loading. The significant cyclic features of concrete are described in the model using irrecoverable strains, crack closing and reopening, nonlinear unloading curves that represent the energy dissipation, and reloading curves with the degraded reloading stiffness that account for the damage. Partial unloading/reloading is also accounted for. The model is implemented in the context of the fracture energy based smeared rotating crack approach, and validated using measured data from experiments at both the material and structure levels. Case studies show that the model is more applicable and accurate in the nonlinear analysis of reinforced concrete structures than models with idealized hysteretic schemes.
机译:本文提出了一种用于预测钢筋混凝土响应的本构模型。特别令人关注的是准静态反向循环荷载作用下混凝土滞回性能的逼真建模。该模型使用不可恢复的应变,裂缝闭合和重新打开,代表能量耗散的非线性卸荷曲线以及具有降低的重载刚度来说明损伤的重载曲线来描述混凝土的重要循环特征。还考虑了部分卸载/重新装载。该模型是在基于断裂能的涂抹旋转裂纹方法的背景下实施的,并使用了来自材料和结构水平的实验测量数据进行了验证。案例研究表明,与具有理想滞回方案的模型相比,该模型在钢筋混凝土结构的非线性分析中更为适用和准确。

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