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作者:

Lu, Zhao-Hui (Lu, Zhao-Hui.) | Li, Hai (Li, Hai.) | Li, Wengui (Li, Wengui.) | Zhao, Yan-Gang (Zhao, Yan-Gang.) | Tang, Zhuo (Tang, Zhuo.) | Sun, Zhihui (Sun, Zhihui.)

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摘要:

Reinforcement corrosion exhibits an adverse effect on the shear strength of reinforced concrete structures. In order to investigate the effects of chloride-induced corrosion of reinforcing steel on the shear behavior and failure pattern of reinforced concrete beams, a total of 24 reinforced concrete beams with different concrete strength grades and arrangements of stirrups were fabricated, among which 22 beams were subjected to accelerated corrosion to achieve different degrees of reinforcement corrosion. The failure pattern, crack propagation, load-displacement response, and ultimate strength of these beams were investigated under a standard four-point loading test in this study. Extensive comparative analysis was conducted to investigate the effects of the concrete strength, shear span-to-depth ratio, and stirrup type on the shear behavior of the corroded reinforced concrete beams. The results show that increasing the stirrup yielding strength is more effective in improving the shear strength of corroded reinforced concrete beams than that of concrete compressive strength. In terms of three types of stirrups, the shear strength of the beams with deformed HRB-335 is least sensitive to stirrup corrosion, followed by the beams with smooth HPB-235 and the beams with deformed HRB-400. The effect of the different stirrups on the shear strength depends on the corrosion degree of stirrup and shear span-to-depth ratio of the beam. The predicted results of shear strength of corroded reinforced concrete beams by a proposed analytical model are well consistent with the experimental results.

关键词:

failure pattern shear behavior degradation beam reinforced concrete stirrup chloride-induced corrosion

作者机构:

  • [ 1 ] [Lu, Zhao-Hui]Cent S Univ, Sch Civil Engn, Changsha, Hunan, Peoples R China
  • [ 2 ] [Li, Hai]Cent S Univ, Sch Civil Engn, Changsha, Hunan, Peoples R China
  • [ 3 ] [Lu, Zhao-Hui]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Zhao, Yan-Gang]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 5 ] [Tang, Zhuo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 6 ] [Li, Wengui]Univ Technol Sydney, Ctr Built Infrastruct Res, POB 123,15 Broadway, Sydney, NSW 2007, Australia
  • [ 7 ] [Li, Wengui]Univ Technol Sydney, Sch Civil & Environm Engn, POB 123,15 Broadway, Sydney, NSW 2007, Australia
  • [ 8 ] [Sun, Zhihui]Univ Louisville, Dept Civil & Environm Engn, Louisville, KY 40292 USA

通讯作者信息:

  • [Li, Wengui]Univ Technol Sydney, Ctr Built Infrastruct Res, POB 123,15 Broadway, Sydney, NSW 2007, Australia;;[Li, Wengui]Univ Technol Sydney, Sch Civil & Environm Engn, POB 123,15 Broadway, Sydney, NSW 2007, Australia

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来源 :

ADVANCES IN STRUCTURAL ENGINEERING

ISSN: 1369-4332

年份: 2019

期: 14

卷: 22

页码: 2998-3010

2 . 6 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:136

JCR分区:3

被引次数:

WoS核心集被引频次: 23

SCOPUS被引频次: 22

ESI高被引论文在榜: 0 展开所有

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