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Innovation for Railway Bridge Decks: A Prebent Steel-VHPC Beam

Author(s):
ORCID

Medium: journal article
Language(s): English
Published in: Structural Engineering International, , n. 2, v. 20
Page(s): 134-137
DOI: 10.2749/101686610791283524
Abstract:

An extensive experimental study has been carried out in the framework of the French National Project MIKTI devoted to innovative composite structures to extend the Belgian technique of composite prebent beams called “preflex” beams, to very high performance concrete (VHPC). By comparison with experience gained from the Belgian precast industry, the main advantage of using VHPC with silica fume is to reduce the prestressing losses of the system, thanks to a significant decrease of the creep in addition to the possibility of optimizing the weight and the span of the beam. Major issues of the research were to validate a design method at serviceability state related to concrete cracking and at ultimate limit state corresponding to instability of the steel girder and the preservation of the composite behaviour of the beam even after a large number of live load cycles. The analysis of the global response of two 13 m long beams monitored during several months allowed to conclude the feasibility to optimize a prebent beam with a VHPC.

  • About this
    data sheet
  • Reference-ID
    10058046
  • Published on:
    10/11/2010
  • Last updated on:
    13/08/2014
 
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