0
  • DE
  • EN
  • FR
  • Base de données et galerie internationale d'ouvrages d'art et du génie civil

Publicité

Influence of Cracking on Effects of Restrained Deformations in a Post-tensioned Concrete Bridge

Auteur(s): (Graduate researcher, Tampere University of Technology , Department of Civil Engineering Korkeakoulunkatu 10, 33101 , Tampere , Finland)
(Post-graduate researcher, Tampere University of Technology , Department of Civil Engineering Korkeakoulunkatu 10, 33101 , Tampere , Finland)
(Professor, Tampere University of Technology , Department of Civil Engineering Korkeakoulunkatu 10, 33101 , Tampere , Finland)
Médium: article de revue
Langue(s): anglais
Publié dans: Nordic Concrete Research, , n. 1, v. 59
Page(s): 95-110
DOI: 10.2478/ncr-2018-0017
Abstrait:

Imposed and restrained deformations cause stresses in continuous concrete bridges, and in analyses of the superstructure these stresses are usually reduced to some degree due to creep and cracking of concrete. This study examines cracking and redistribution of stresses in a bridge superstructure under the loads and load combinations used in the original bridge design. The subject of this study is a three-span post-tensioned continuous concrete cantilever beam bridge. The bridge was analysed with non-linear calculation utilising the general force method and moment-curvature relationships. The analysis yielded the bending stiffness of the post-tensioned bridge superstructure as a function of bridge length under different loads. It was discovered that the secondary moment from prestressing force increased as the bending stiffness of the central span decreased due to cracking under external loads, which is not normally considered in design. The bending moment effects of linear temperature difference and support settlement decreased as expected as the superstructure bending stiffness decreased. The analysis provided new information on the effects of secondary moment from the prestressing force and on the difference between the cracked state and the linear elastic analysis of the concrete bridge superstructure.

Structurae ne peut pas vous offrir cette publication en texte intégral pour l'instant. Le texte intégral est accessible chez l'éditeur. DOI: 10.2478/ncr-2018-0017.
  • Informations
    sur cette fiche
  • Reference-ID
    10705861
  • Publié(e) le:
    19.02.2023
  • Modifié(e) le:
    19.02.2023
 
Structurae coopère avec
International Association for Bridge and Structural Engineering (IABSE)
e-mosty Magazine
e-BrIM Magazine