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作者:

Wu, Jieqiong (Wu, Jieqiong.) | Yang, Jian (Yang, Jian.) | Guo, Li (Guo, Li.) | Jin, Liu (Jin, Liu.) (学者:金浏) | Du, Xiuli (Du, Xiuli.)

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EI Scopus SCIE

摘要:

In this study, 26 beam specimens were subjected to flexural loading to discuss the effects of cylinder concrete compressive strength (28 MPa, 37 MPa and 43 MPa), tensile reinforcement corrosion (mass loss rates of 2.1% to 10.3%), stirrups corrosion (mass loss rates of 11.2% to 26.3%), and loading rate (0.5 - 300 mm/min) on bond capacities. The following results are shown: (1) the increase of concrete strength could increase the bond strength, but results in the bond stress decreasing more rapidly after bond failure; (2) the existence of stirrups could not significantly improve the bond strength in a corrosive environment, since a wide transverse crack width (e.g., greater than 1.0 mm) on concrete would be induced by their severe corrosion; (3) the increases of loading rate lead to about 34.8% increases in the bond strength while decrease the peak slip; (4) a simplified model for the bond stress-slip curve, incorporating the concrete strength, tensile reinforcement corrosion, stirrups corrosion and loading rate, is proposed and validated.

关键词:

Bond capacity Loading rate Concrete strength Steel corrosion RC beams

作者机构:

  • [ 1 ] [Wu, Jieqiong]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, China Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Yang, Jian]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, China Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Guo, Li]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, China Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Jin, Liu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, China Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, China Minist Educ, Beijing 100124, Peoples R China

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来源 :

STRUCTURES

ISSN: 2352-0124

年份: 2023

卷: 53

页码: 228-239

4 . 1 0 0

JCR@2022

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