Performance of Steel Tube Strengthened Recycled Concrete Exposure to High Temperature and Reinforced by CFRP

Journal of Residuals Science & Technology Pub Date : 2017-01-01 DOI:10.12783/ISSN.1544-8053/14/S1/20

S. Yuan, Jiangfeng Dong, Qingyuan Wang

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引用次数: 2

Abstract

This paper presents the results of experimental investigations on steel tube strengthened recycled concrete (STSRC) exposed to high temperatures and reinforced by CFRP. The failure mode, bearing capacity and deformability of the columns were investigated to analyze the effects of CFRP, temperatures (300°C, 500°C and 700°C), and recycled coarse aggregate (RCA) replacement ratios (0%, 50% and 100%) on mechanical performance. The results indicate that the higher exposed temperatures, the more cracks occurred and the lower ultimate load carrying capacities for the specimens, and the failure mode and load capacity could be increased greatly by external strengthened with CFRP sheets. However, the higher RCA replacement ratio could induced a smaller cracks and higher load capacity, and the specimens with 50% RCA ratio gave the highest load capacity when exposed to high temperature. In addition, the ABAQUS software was employed to conduct finite element analysis (FEA) of STSRC reinforced, and a comparison of results calculated using the proposed model exhibits good agreement with an experimental results.

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碳纤维布加固钢管增强再生混凝土高温暴露性能研究

本文介绍了高温下CFRP加固钢管增强再生混凝土(STSRC)的试验研究结果。研究了CFRP、温度(300℃、500℃和700℃)和再生粗骨料(RCA)替代率(0%、50%和100%)对柱力学性能的影响，并对柱的破坏模式、承载力和变形能力进行了研究。结果表明:温度越高，试件裂纹越多，极限承载能力越低，采用CFRP布外加固可大大提高试件的破坏模式和承载能力;而较高的RCA替换率可使试件产生较小的裂纹和较高的承载能力，且当RCA替换率为50%时，试件在高温下的承载能力最高。利用ABAQUS软件对加固后的STSRC进行了有限元分析，计算结果与试验结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Residuals Science & Technology 环境科学-工程：环境

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： The international Journal of Residuals Science & Technology (JRST) is a blind-refereed quarterly devoted to conscientious analysis and commentary regarding significant environmental sciences-oriented research and technical management of residuals in the environment. The journal provides a forum for scientific investigations addressing contamination within environmental media of air, water, soil, and biota and also offers studies exploring source, fate, transport, and ecological effects of environmental contamination.