Analysis-oriented models for FRP-confined concrete: 3D interpretation and general methodology
Analysis-oriented models for FRP-confined concrete: 3D interpretation and general methodology
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DOI：
10.1016/j.engstruct.2020.110749
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发表时间：
2020-08
影响因子：
5.5
通讯作者：
Jia-Qi Yang;P. Feng
中科院分区：
文献类型：
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作者：
Jia-Qi Yang;P. Feng
纤维增强聚合物（FRP）复合材料在结构工程中的一个重要应用是约束混凝土。与活性约束混凝土相比，当施加足够的约束时，FRP约束混凝土的应力-应变曲线可以有第二个上升分支。已经提出了许多分析模型来预测FRP约束混凝土的轴向应力-应变行为。这些模型可以分为两类：（a）面向分析的模型和（B）面向设计的模型。在本文中，提出了一个三维几何方法来解释的一般理论分析导向模型的基础上，三个一般方程。这种方法提供了一个直观的角度来理解面向分析的模型和FRP约束混凝土的机制。通过这种方法，一个系统的方法来校准面向分析的模型，并在面向设计的模型的参数是合理的。这种方法也可以应用于建立面向分析的模型，为其他混凝土类型的材料。
An important application of fibre-reinforced polymer (FRP) composites in structural engineering is to confine concrete. In contrast to actively confined concrete, the stress-strain curve of FRP-confined concrete can have a second ascending branch when sufficient confinement is applied. Numerous analytical models have been proposed to predict the axial stress–strain behaviour of FRP-confined concrete. These models can be classified into two categories: (a) analysis-oriented models and (b) design-oriented models. In this paper, a 3-dimensional geometrical approach is proposed to interpret the general theory of analysis-oriented models based on three general equations. This approach provides an intuitive perspective to understand the analysis-oriented models and the mechanism of FRP-confined concrete. With this approach, a systematic methodology for calibrating analysis-oriented models is demonstrated, and the parameters in design-oriented models are justified. This methodology can also be applied to build analysis-oriented models for other concrete-type materials.