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Author:

Wang, Tian-Ci (Wang, Tian-Ci.) | Gao, Wan-Yang (Gao, Wan-Yang.) | Hu, Li-Li (Hu, Li-Li.) | Hamed, Ehab (Hamed, Ehab.) | Bai, Yu-Lei (Bai, Yu-Lei.) | Zeng, Jun-Jie (Zeng, Jun-Jie.) | Yang, Jian (Yang, Jian.)

Indexed by:

EI Scopus SCIE

Abstract:

Bond behavior between steel bars and concrete is likely to be significantly degraded after exposure to high temperatures in a fire, which will influence the residual strength of the reinforced concrete (RC) member and the selection of appropriate repair and strengthening solutions. This paper presents an analytical model for predicting the bond behavior between steel bars and concrete after exposure to high temperatures. The concrete cover around the steel bar is considered as a thick-walled cylinder whose inner surface is subjected to uniform pressure. The cylinder is further divided into a partially cracked interior portion and an uncracked outer portion under a pull-out loading. The tensile softening behavior of the cracked interior portion and the material property degradations of steel and concrete after exposure to high temperatures are considered. The proposed model has demonstrated its accuracy and reliability in predicting the residual bond strengths of steel bars by comparing the analytical predictions with pull-out tests results from the literature. A local bond-slip relationship is then established and used in a finite element analysis. The finite element results are then compared with measured load-displacement curves that were obtained from pull-out tests in the literature, providing a verification to the proposed bond-slip constitutive law.

Keyword:

Residual bond behavior Local bond -slip relationship Confinement effect High temperatures Steel bars

Author Community:

  • [ 1 ] [Wang, Tian-Ci]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China
  • [ 2 ] [Gao, Wan-Yang]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China
  • [ 3 ] [Hu, Li-Li]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China
  • [ 4 ] [Yang, Jian]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China
  • [ 5 ] [Wang, Tian-Ci]Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai Key Lab Digital Maintenance Bldg & Infra, Shanghai 200240, Peoples R China
  • [ 6 ] [Gao, Wan-Yang]Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai Key Lab Digital Maintenance Bldg & Infra, Shanghai 200240, Peoples R China
  • [ 7 ] [Hu, Li-Li]Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai Key Lab Digital Maintenance Bldg & Infra, Shanghai 200240, Peoples R China
  • [ 8 ] [Yang, Jian]Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai Key Lab Digital Maintenance Bldg & Infra, Shanghai 200240, Peoples R China
  • [ 9 ] [Hamed, Ehab]Univ New South Wales, Ctr Infrastruct Engn & Safety, Sch Civil & Environm Engn, Sydney, NSW 2052, Australia
  • [ 10 ] [Bai, Yu-Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 11 ] [Zeng, Jun-Jie]Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Peoples R China

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Source :

CONSTRUCTION AND BUILDING MATERIALS

ISSN: 0950-0618

Year: 2022

Volume: 343

7 . 4

JCR@2022

7 . 4 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:66

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 5

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

Affiliated Colleges:

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