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FE analysis of reinforced concrete corbels with enhanced continuum models

机译:增强连续模型的钢筋混凝土牛腿有限元分析

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The paper presents quasi-static FE-simulations of the behaviour of short reinforced concrete corbels with and without shear reinforcement. Concrete was modelled with the aid of three various constitutive continuum models: an isotropic elasto-plastic, an isotropic damage and an anisotropic smeared crack approach. To ensure the mesh-independent numerical results and to describe strain localization, a characteristic length of micro-structure was introduced by means of a non-local theory. To simulate the behaviour of reinforcement, an associated elasto-plastic constitutive model with isotropic hardening was assumed. The effects of a characteristic length, bond between concrete and reinforcement, tensile and compressive fracture energy and shear reinforcement on strain localization were carefully investigated. The numerical results were compared with corresponding laboratory tests.
机译:本文介绍了带有和不带有剪切钢筋的短钢筋混凝土牛腿的行为的准静态有限元模拟。借助三种不同的本构连续模型对混凝土进行建模:各向同性弹塑性,各向同性破坏和各向异性涂片裂纹法。为了确保独立于网格的数值结果并描述应变局部化,通过非局部理论引入了微结构的特征长度。为了模拟钢筋的行为,假设了一个具有各向同性硬化作用的关联弹塑性本构模型。仔细研究了特征长度,混凝土与钢筋之间的粘结,拉伸和压缩断裂能以及剪切钢筋对应变局部化的影响。将数值结果与相应的实验室测试进行比较。

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