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Transfer, Development, and Splice Length for Strand/Reinforcement in High-Strength Concrete (2008) / Chapter Skim
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Pages 1-3

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From page 1...
... Researchers from Purdue University and Oklahoma State University have jointly prepared this report. Transfer Length and Development Length for Strand Recommendations include new transfer length and development length equations for incorporation into Articles 5.11.4.1 and 5.11.4.2 of the AASHTO LRFD Bridge Design Specifications.
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From page 2...
... Development length of black and epoxy-coated bars terminated with a standard hook. Based on observations from tests conducted during NCHRP Project 12-60 on 18 top cast beam-splice specimens and the examination of an extensive database of previous tests compiled by ACI Committee 408, it is proposed that extension of the AASHTO LRFD Bridge Design Specifications to concrete strengths up to 15 ksi follow a format similar to the one used in ACI: 318-05: Building Code Requirements for Structural Concrete and Commentary (ACI 2005)
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From page 3...
... Class C splices were eliminated based on the modifications to development length provisions. The proposed modifications to Article 5.11.2.1 of the AASHTO LRFD Bridge Design Specifications contain several changes that eliminated many of the concerns regarding tension splices due to closely spaced bars with minimal cover; however, development lengths, on which splice lengths are based, have in some cases increased.
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Key Terms

  • lrfd bridge
  • bridge design
  • aashto lrfd
  • design specifications
  • nchrp project

  • splice length
  • transfer length
  • concrete strength
  • strand diameters
  • development lengths

  • concrete compressive
  • standard test
  • compressive strengths
  • expression provides
  • length expression

  • prestressing strand
  • length equations
  • bottom cast
  • experimental work
  • bars terminated

  • aci committee
  • tests conducted
  • test method
  • concrete design
  • shorter development

  • strand requires
  • specifications dealing
  • bottom bars
  • spaced bars
  • length provisions


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