Assessment of shear resistance of corroded beams repaired using SFRC in the tension zone

IF 2.9 4区工程技术 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Concrete Pub Date : 2021-05-01 DOI:10.12989/CAC.2021.27.5.395

P. Jongvivatsakul, Phattarakan Laopaitoon, Yen Thi Hai Nguyen, Phuoc T. Nguyen, L. Bui

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引用次数: 2

Abstract

This study experimentally and analytically investigates the shear behavior of corroded reinforced concrete (RC) beams repaired using steel fiber-reinforced concrete (SFRC) in the flexural zone. The experimental parameters are the corrosion degree (0%, 12%, and 17%) and the steel fiber volume in the SFRC (1.0%, 1.5%, and 2.0%). The test results reveal that corrosion degree significantly affects the shear resistance of the beams. The shear capacity of the beam with the corrosion degree of 17% was higher than that of the uncorroded beam, whereas the shear capacity of the beam with the corrosion degree of 12% was lower than that of the uncorroded beam. The shear efficiency of damaged beams can be recovered by repairing them using SFRC that contains a reasonable amount of steel fibers. In addition, two methods to estimate the shear capacity of the repaired beams are developed using the modified truss analogy and strut-and-tie models. The estimated shear capacity of the beam using the modified truss analogy model agrees well with the experimental data.

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受拉区钢筋混凝土腐蚀梁的抗剪性能评价

本研究对钢筋混凝土锈蚀梁在受弯区用钢纤维混凝土(SFRC)修复后的抗剪性能进行了试验分析研究。试验参数为腐蚀程度(0%、12%、17%)和钢纤维在SFRC中的体积(1.0%、1.5%、2.0%)。试验结果表明，腐蚀程度对梁的抗剪性能有显著影响。腐蚀程度为17%的梁抗剪能力高于未腐蚀的梁，而腐蚀程度为12%的梁抗剪能力低于未腐蚀的梁。采用含有适量钢纤维的钢纤维混凝土对受损梁进行修复，可恢复其抗剪效率。此外，还提出了修正桁架类比法和拉杆模型两种估算修复梁抗剪承载力的方法。采用改进的桁架类比模型估算的梁抗剪承载力与试验数据吻合较好。

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

Computers and Concrete 工程技术-材料科学：表征与测试

CiteScore

8.60

自引率

7.30%

发文量

审稿时长

13.5 months

期刊介绍： Computers and Concrete is An International Journal that focuses on the computer applications in be considered suitable for publication in the journal. The journal covers the topics related to computational mechanics of concrete and modeling of concrete structures including plasticity fracture mechanics creep thermo-mechanics dynamic effects reliability and safety concepts automated design procedures stochastic mechanics performance under extreme conditions.