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Numerical model for CFRP confined concrete elements subject to monotonic and cyclic loadings

机译:单调和循环荷载作用下CFRP约束混凝土构件的数值模型

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摘要

Uniaxial cyclic and monotonic compression tests were carried out on partially and fully wrapped concretecylinders with Carbon Fibre Reinforced Polymer (CFRP) wet lay-up sheets. The influence of the concretecompressive strength, CFRP stiffness, geometric confinement arrangement and loading type on thecompressive behaviour of reinforced concrete column elements of circular cross section up to their failurewas assessed. A uniaxial stress-strain constitutive model is proposed, and the results obtained from theexperimental tests were used to calibrate some of the parameters of this model, and to appraise the modelperformance. This model allows the simulation of reinforced concrete members by using Timoshenkoone-dimensional elements, in the context of the finite element method (fibre model). Good agreement wasobtained between numerical simulations and experimental results for both monotonic and cyclic loadingtests.
机译:使用碳纤维增强聚合物(CFRP)湿铺板对部分和完全包裹的混凝土圆筒进行单轴循环和单调压缩试验。评估了混凝土抗压强度,CFRP刚度,几何约束布置和荷载类型对圆形截面钢筋混凝土柱单元直至破坏的抗压性能的影响。提出了单轴应力-应变本构模型,并利用实验测试的结果对模型的一些参数进行了标定,并对模型的性能进行了评估。该模型允许在有限元方法(纤维模型)的背景下,使用Timoshenkoone维元模拟钢筋混凝土构件。对于单调和循环载荷试验,数值模拟与实验结果之间取得了良好的一致性。

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