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

Details

• Creators:
  Yu, Hailing ; Jeong, David Y.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Subject/TRT Terms:
  Bond Strength (Materials) Concrete Ties Elastoplasticity Concrete Crossties Failure Analysis Finite Element Method Prestressed Concrete Ties Stress Cracking
• 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
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:8e9fd82daa50d8b3ec05a973082880296a440b500b4ded3309cdf658013dc7d5343b8d89e785be3df9b34a6f27e71efa75966177e1f0f85ce3c2177ce3d261de
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/12176/dot_12176_DS1.pdf
• File Type:
  [PDF - 4.36 MB ]