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Improved Detailing in Steel Bridges to Prevent Constraint-Induced Fracture

File Language:
English


Filetype [PDF - 17.01 MB]

Details

  • Creators:
    Bennett, Caroline ORCID ICON IMG ; Collins, William N. ORCID ICON IMG ; Cobos, Jaswant ORCID ICON IMG
  • Corporate Creators:
    University of Kansas. Center for Research
  • Corporate Contributors:
    United States. Federal Highway Administration. Office of Bridges and Structures
  • Subject/TRT Terms:
  • Publication/ Report Number:
    SM Report No. 169
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Edition:
    Final Report, September 2021 – December 2025
  • Corporate Publisher:
    University of Kansas. Center for Research
  • Abstract:
    This report describes an investigation focused on characterizing the phenomenon of constraint-induced fracture (CIF) in steel bridges, specifically considering three classes of details which prior research has not adequately addressed: thick bearing stiffeners, connection plates, and orthogonal stiffeners with varying constraint-relief gap dimensions. The research approach taken in the study included a suite of nonlinear parametric finite element models. To close knowledge gaps regarding the risk of CIF at in existing bridges and new designs, the influence of the following variables were considered: web thicknesses, gap dimensions, stiffener thickness, and in some cases, out-of-plane loading. A series of analyses were conducted to assess CIF susceptibility of the following details: a discontinuous stiffener interrupted by an orthogonal continuous stiffener, and a connection plate continuously welded into the flange/web junction. The modeling effort focused on computation of triaxiality factors to quantify the level of constraint at the details studied, and to compare across the modeling suite.
  • Format:
    PDF
  • Funding:
    693JJ321C000026
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/88257/dot_88257_DS1.pdf
  • File Type:
    Filetype[PDF - 17.01 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:fc33892964a23cc0da6fbdf9b8ce53b3e52ba8bab612c6200b5bfbe74f3784e2d74c4723783bf6dc71363e7ec04dc9d7b0e72a5181ecc8854c961eead768f302
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