The behavior of bridge bents under spatial loads was investigated to evaluate the suitability of the current office procedure of the Texas State Department of Highways and Public Transportation (TSDHPT) for analyzing and designing slender concrete bridge bent columns. Two computer codes were developed for this purpose. The linear method of analysis uses the conventional direct stiffness method of solution and considers linear material behavior. The AASHTO moment magnifier method was used to approximate second order effects. The design forces from the linear analysis were compared with those from the TSDHPT approximate procedure. The effect of variation in live load positions over the bridge deck was examined. The nonlinear method of analysis, developed in this study, uses a fiber model and an updated Lagrange finite element formulation to predict the space behavior of multistory concrete bents. The analytical results for typical bents were compared with those from the TSDHPT approximate method and the AASHTO moment magnification procedure. The sensitivity of the results to bent column slenderness and foundation flexibilities were examined in terms of predicted bent behavior.

  • Supplemental Notes:
    • Research study title: Bent Column Analysis and Design.
  • Corporate Authors:

    University of Texas, Austin

    Center for Transportation Research, 3208 Red River Street
    Austin, TX  United States  78705

    Texas Department of Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • HAQUE, M
    • Roesset, J M
    • Johnson, C P
  • Publication Date: 1988-11


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 76 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00625029
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-90+1129-2F, Res Rept 1129-2F, CTR 3-5-86-1129-2F
  • Contract Numbers: Study 3-5-86-1129
  • Created Date: Oct 5 1993 12:00AM