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Finite element bond models for seven-wire prestressing strands in concrete crossties.

File Language:
English


Details

  • Creators:
    Yu, Hailing ORCID ICON IMG ; Jeong, David Y.
  • Corporate Creators:
    John A. Volpe National Transportation Systems Center (U.S.)
  • Subject/TRT Terms:
  • Publication/ Report Number:
    JRC2015-5758
  • Resource Type:
    In Proceedings
  • Geographical Coverage:
    United States
  • Corporate Publisher:
    American Society of Mechanical Engineers
  • Abstract:
    Seven-wire strands are commonly used in pretensioned ; concrete ties, but its bonding mechanism with concrete needs ; further examination to provide a better understanding of some ; concrete tie failure modes. As a key component in the finite ; element (FE) analysis of concrete crossties, macro-scale or ; phenomenological FE bond models are developed for sevenwire ; strands in this paper. The strand-concrete interfaces are ; homogenized with a thin layer of cohesive elements applied ; between the strand and concrete elements. Further, the ; cohesive elements are assigned traction-displacement ; constitutive or bond relations that are defined in terms of ; normal and shear stresses versus interfacial dilation and slip. ; The bond relations are developed within an elasto-plastic ; framework that characterizes the adhesive, frictional and/or ; dilatational bonding mechanisms in the interface. The yield ; functions and plastic flow rules specific for the seven-wire ; strands are presented. The bond parameters are calibrated from ; untensioned pullout tests and pretensioned prism tests ; conducted on concrete specimens. The bond models are then ; verified with (1) the surface strain data measured on actual ; concrete crossties made at a tie manufacturing plant, and (2) the ; force-displacement relation obtained in a center negative ; moment test conducted also on concrete crossties.
  • Format:
    PDF
  • Funding:
    RR19A2/NTC41
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/12176/dot_12176_DS1.pdf
  • File Type:
    Filetype[PDF - 4.36 MB]
  • Collection(s):
    Volpe Center
  • Main Document Checksum:
    urn:sha-512:8e9fd82daa50d8b3ec05a973082880296a440b500b4ded3309cdf658013dc7d5343b8d89e785be3df9b34a6f27e71efa75966177e1f0f85ce3c2177ce3d261de
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