Analysis-oriented models for FRP-confined concrete: 3D interpretation and general methodology

被引：71

作者：

Yang, Jia-Qi ^{[1
]}

Feng, Peng ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Civil Engn, Key Lab Civil Engn Safety & Durabil, China Minist Educ, Beijing 100084, Peoples R China

来源：

ENGINEERING STRUCTURES | 2020年 / 216卷

基金：

中国国家自然科学基金;

关键词：

Confined concrete; Fibre-reinforced polymer; Analysis-oriented model; Stress-strain behaviour; STRESS-STRAIN MODEL; AXIAL COMPRESSIVE BEHAVIOR; HIGH-STRENGTH CONCRETE; CORAL AGGREGATE CONCRETE; MECHANICAL-BEHAVIOR; CIRCULAR SECTIONS; FIBER ORIENTATION; JACKETED CONCRETE; COLUMNS; CYLINDERS;

D O I：

10.1016/j.engstruct.2020.110749

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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.

引用

页数：24

共 112 条

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