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Resistance of prestressed bridge girders to diagonal tension cracking

 Resistance of prestressed bridge girders to diagonal tension cracking
Author(s): , ORCID, ORCID, ,
Presented at IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021, published in , pp. 819-827
DOI: 10.2749/ghent.2021.0819
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Diagonal tension cracking is the governing failure mode for bridge girders with a thin web that are highly prestressed and contain little shear reinforcement. When assessing existing bridge girders...
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Bibliographic Details

Author(s): (Delft University of Technology, Delft, the Netherlands; Rijkswaterstaat, Ministry of Infrastructure and Water Management, Utrecht, the Netherlands)
ORCID (Delft University of Technology, Delft, the Netherlands Norwegian University of Science and Technology, Norway‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌)
ORCID (Delft University of Technology, Delft, the Netherlands)
(Delft University of Technology, Delft, the Netherlands)
(Rijkswaterstaat, Ministry of Infrastructure and Water Management, Utrecht, the Netherlands)
Medium: conference paper
Language(s): English
Conference: IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021
Published in:
Page(s): 819-827 Total no. of pages: 9
Page(s): 819-827
Total no. of pages: 9
DOI: 10.2749/ghent.2021.0819
Abstract:

Diagonal tension cracking is the governing failure mode for bridge girders with a thin web that are highly prestressed and contain little shear reinforcement. When assessing existing bridge girders using the Eurocode 2 [1], it often turns out that it is not possible to demonstrate sufficient resistance to diagonal tension cracking. This paper evaluates the method to determine the maximum principal tensile stresses as used in the Eurocode 2 [1] and investigates how flexural cracks affect the principle tensile stresses in the regions without flexural cracks. This paper also investigates how the tensile strength of the web is affected by the presence of compressive stresses and by the size of the area subjected to high tensile stresses. Based on the results of these investigations, an improved model is proposed to determine the resistance to diagonal tension cracking.

Keywords:
size effect shear tension failure diagonal tension cracking tensile strength of concrete prestressed girders bi-axial behaviour
Copyright: © 2021 International Association for Bridge and Structural Engineering (IABSE)
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