Experimental investigation on axial compression behavior of heat-damaged concrete cylinders confined with CFRP sheets

被引：0

作者：

Zhao, Kang ^{[1
]}

Hu, Zhongjun ^{[1
]}

Wang, Boxin ^{[1
]}

Wen, Yuchuan ^{[1
]}

Han, Jingyi ^{[1
]}

Wu, Qiong ^{[1
]}

Xu, Yan ^{[1
]}

机构：

[1] Jilin Univ, Coll Construct Engn, Changchun 130026, Peoples R China

来源：

STRUCTURES | 2024年 / 70卷

基金：

中国国家自然科学基金;

关键词：

Carbon fiber-reinforced polymer (CFRP); Heat-damaged concrete cylinders; Axial compression; Heating temperature; Cooling method; HIGH-STRENGTH CONCRETE; STRESS-STRAIN MODEL; FIRE RESISTANCE; FRP; TEMPERATURES; COMPOSITES;

D O I：

10.1016/j.istruc.2024.107560

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study focuses on the axial compression behavior of heat-damaged concrete cylinders repaired with carbon fiber-reinforced polymer (CFRP) sheets. A total of 52 specimens were tested to investigate the effects of heating temperature, CFRP layers and cooling methods on the mechanical properties of heat-damaged concrete cylinders. The test results indicated that the residual compressive strength of heat-damaged concrete with water cooling is lower than that of heat-damaged concrete with natural cooling when the exposure temperature is >= 400 degrees C. The confinement of CFRP can enhance the residual compressive strength of heat-damaged concrete. Considering the effect of the heating temperature and cooling method, a combination model was suggested to predict the ultimate strength of heat-damaged concrete confined by CFRP sheets, as well as the accuracy and applicability of the combination model were examined and demonstrated with test results and collected experimental data.

引用

页数：14

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