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

Publicité

Load and resistance factors for prestressed concrete girder bridges

Auteur(s):

Médium: article de revue
Langue(s): anglais
Publié dans: Budownictwo i Architektura, , n. 3, v. 19
Page(s): 103-115
DOI: 10.35784/bud-arch.2120
Abstrait:

There has been a considerable progress in the reliability-based code development procedures. The load and resistance factors in the AASHTO bridge design code were determined using the statistical parameters from the 1970's  and early 1980’s. Load and resistance factors were determined by first fixing the load factors and then calculating resistance factors. Load factors were selected so that the factored load corresponds to two standard deviations from the mean value and the resistance factors were calculated so that the reliability index is close to the target value. However, from the theoretical point of view, the load and resistance factors are to be determined as coordinates of the so-called “design point” that corresponds to less than two standard deviations from the mean. Therefore, the optimum load and resistance factors are about 10% lower than what is in the AASHTO LRFD Code. The objective of this paper is to revisit the original calibration and recalculate the load and resistance factors as coordinates of the “design point” for prestressed concrete girder bridges. The recommended new load and resistance factors provide a consistent reliability and a rational safety margin.

License:

Cette oeuvre a été publiée sous la license Creative Commons Attribution - Partage dans les Mêmes Conditions 4.0 (CC-BY-SA 4.0) International. Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et que le partage se fait dans les mêmes conditions (license) que l'original. Un lien vers la license (ci-dessus) toit être inclus. Toute altération vis-à-vis de l'original doit être indiquée.

  • Informations
    sur cette fiche
  • Reference-ID
    10475547
  • Publié(e) le:
    13.11.2020
  • Modifié(e) le:
    02.06.2021