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Kinematics-based model for complete behavior of RC dapped-end connections failing along a re-entrant corner crack

 Kinematics-based model for complete behavior of RC dapped-end connections failing along a re-entrant corner crack
Author(s): , ,
Presented at IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022, published in , pp. 1635-1642
DOI: 10.2749/prague.2022.1635
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Reinforced concrete dapped-end connections, which are common in existing Gerber-beam bridges, typically feature an inclined corner crack at service loads due to the high stress concentrations in th...
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Bibliographic Details

Author(s): (University of Liège and Hasselt University, Belgium)
(Hasselt University, Belgium)
(University of Liège, Belgium)
Medium: conference paper
Language(s): English
Conference: IABSE Symposium: Challenges for Existing and Oncoming Structures, Prague, Czech Republic, 25-27 May 2022
Published in:
Page(s): 1635-1642 Total no. of pages: 8
Page(s): 1635-1642
Total no. of pages: 8
DOI: 10.2749/prague.2022.1635
Abstract:

Reinforced concrete dapped-end connections, which are common in existing Gerber-beam bridges, typically feature an inclined corner crack at service loads due to the high stress concentrations in the re-entrant corner. These cracks introduce corrosion issues and increase the stresses in the dapped-end reinforcement, which in the event of further deterioration and increased loading may lead to yielding and failure of the connection. This paper proposes a kinematics-based model for the complete behaviour of such connections which predicts the opening of the cracks based on first principles: compatibility, equilibrium and constitutive relationships. The model stems from an earlier kinematics-based approach for the capacity prediction of dapped-end connections failing along re-entrant corner cracks, and extends it to describe the complete pre-peak, peak and post- peak behaviour.

Keywords:
reinforced concrete dapped-end connections kinematics-based model re-entrant corner crack complete behaviour
Copyright: © 2022 International Association for Bridge and Structural Engineering (IABSE)
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