Implementation of Displacement Based Design for Highway Bridges

Six bridges classified as ordinary bridges in the Seismic Design Criteria (SDC) by Caltrans are designed according to that criteria and are also designed using the Direct Displacement Based Design (DDBD) method. The bridges include two types of substructures, symmetric and asymmetric configurations and plan curvature. The performance of each of the resulting structures is evaluated by performing nonlinear time history analysis. This work aims to (1) compare the effectiveness of DDBD and SDC in the design of a sample of six ordinary bridges and (2) investigate the items needed for improvement of current DBD practice emphasizing in the determination of displacement demand, displacement capacity and soil-structure interaction effects. Special attention is put on the determination of the displacement demand and an alternative procedure is proposed based on the Substitute Structure Method (SSM). Also, the existing target ductility limits are reviewed considering P-Delta effects for column bents on rigid foundations and drilled shafts bents.

• Corporate Authors:

  Multidisciplinary Center for Earthquake Engineering Research

  State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
  Buffalo, NY  United States  14261-0025
• Authors:
  • Suarez, Vinicio
  • Kowalsky, Mervyn J
• Conference:
  • Fifth National Seismic Conference on Bridges & Highways
  • Location: San Francisco CA, United States
  • Date: 2006-9-18 to 2006-9-20
• Publication Date: 2006

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References;
• Pagination: 11p
• Monograph Title: Fifth National Seismic Conference on Bridges and Highways: Innovation in Earthquake Engineering for Highway Structures

Subject/Index Terms

• TRT Terms: Asymmetry; Bents; Curvature; Ductility; Earthquake resistant design; Highway bridges; Implementation; Substructures; Symmetry
• Identifier Terms: California Department of Transportation
• Uncontrolled Terms: Criteria; Displacement-based design; Nonlinear time-history analyses; Structure
• Subject Areas: Bridges and other structures; Construction; Design; Highways; Research; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01080749
• Record Type: Publication
• Report/Paper Numbers: B08
• Files: TRIS
• Created Date: Nov 15 2007 10:33AM