Lateral strain-axial strain relationship of FRP confined damage concrete

被引：0
|
作者：
Cao Y. [1 ]
Zhang Y. [1 ]
Hou C. [1 ]
Zhao G. [1 ]
Yin Y. [2 ]
机构：
[1] Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan
[2] School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2020年 / 52卷 / 09期
关键词：
Damage level; FRP confined concrete; Lateral strain-axial strain relationship; Pre-damage; Preloading;
D O I：
10.11918/201902085
中图分类号：
学科分类号：
摘要：
To analyze the influence of concrete damage on FRP confined concrete, 264 test data was collected from published literature, and a large database was established, which contains cross-sectional shapes, damage types, and damage levels of specimens, and FRP confined stiffness. Based on the database, the existing lateral strain-axial strain relationship models were evaluated, and a new lateral strain-axial strain relationship model of FRP confined pre-damage concrete columns was established by modifying Jiang's model. Results show that Jiang's model could accurately describe the lateral strain-axial strain behavior of FRP confined undamaged circular concrete columns, but the existing models were not suitable for FRP confined damage concrete columns. With the increase of concrete damage level, the deviation between the calculated value and the test value of the existing models increased. The proposed model was verified by database and could predict the lateral strain-axial strain behavior of FRP confined damage concrete column with good accuracy, which can be applied to FRP confined high temperature damage concrete columns. The model in this paper can be used for FRP confined pre-damage circular, square, and rectangular concrete columns as well as for the calculation of FRP confined preloading concrete columns and square columns. © 2020, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
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页码：85 / 91
页数：6
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