Header menu link for other important links
X
Estimation of collapse load of single-cell concrete box-girder bridges
Babu Kurian,
Published in
2007
Volume: 12
   
Issue: 4
Pages: 518 - 526
Abstract
The simplified equations available at present to predict the collapse loads of single-cell concrete box-girder bridges with simply supported ends are based on either space truss analogy or collapse mechanisms. Experimental studies carried out by various researchers revealed that, of the two formulations available to predict the collapse load, the one based on collapse mechanisms is found to be more versatile and better suited to box sections. Under a pure bending collapse mechanism, the existing formulation is found to predict collapse load with high accuracy. However, in the presence of cross-sectional distortion, there are significant errors in the existing theoretical formulation. This paper attempts to resolve this problem, by proposing a modification to the existing theory, incorporating an empirical expression to assess the extent of corner plastic hinge formation, under distortion-bending collapse mechanism. The modified theoretical formulations are compared with the experimental results available in the literature. New sets of experiments are also conducted to validate the proposed modified theory to estimate the collapse load. In all cases, it is seen that the modified theory to predict the collapse load match very closely with the experimental results. © 2007 ASCE.
About the journal
JournalJournal of Bridge Engineering
ISSN10840702
Open AccessNo
Concepts (10)
  •  related image
    CONCRETE BRIDGES
  •  related image
    HINGES
  •  related image
    Load limits
  •  related image
    Mechanical properties
  •  related image
    Trusses
  •  related image
    BOX SECTIONS
  •  related image
    COLLAPSE LOADS
  •  related image
    CROSS-SECTIONAL DISTORTION
  •  related image
    PLASTIC HINGE FORMATION
  •  related image
    BOX GIRDER BRIDGES