SEISMIC ANALYSIS OF THE SAN DIEGO-CORONADO BAY BRIDGE: COMPARISON OF DYNAMIC ANALYSIS METHODS

This paper summarizes the analytical procedures used in the seismic vulnerability assessment and retrofit design phases of the existing San Diego-Coronado Bay Bridge and describes how analysis was used in the design. The paper contains a comparison of the two main dynamic analysis approaches used in seismic design: nonlinear time history analysis (NTHA) and linear response spectrum analysis (RSA). The analysis work described was commissioned by the California Department of Transportation and was conducted by ANATECH Corporation. A joint venture of McDaniel Engineering and J. Muller International was the prime contractor for the retrofit design. Both the vulnerability and design phases of the work combined the use of linear and nonlinear methods with basic engineering principles to evaluate the dynamic behavior of the overall bridge system and its individual components. Using the Coronado Bridge as a case study, this paper discusses the pros and cons of using NTHA versus RSA and the decision making process for choosing which nonlinearities must be characterized in a seismic evaluation. The paper also examines the modeling strategy of seismically important components, such as the isolation bearings and the approach used for deformation-based design.

• Corporate Authors:

  California Department of Transportation

  1120 N Street
  Sacramento, CA  United States  95814
• Authors:
  • Dameron, R A
  • Sobash, V P
  • Ashley, W M
• Conference:
  • Second National Seismic Conference on Bridges and Highways
  • Location: Sacramento, California
  • Date: 1997-7-8 to 1997-7-11
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 569-583

Subject/Index Terms

• TRT Terms: Bridge bearings; Bridges; Deformation; Earthquake resistant design; Mathematical models; Nonlinear systems; Retrofitting
• Identifier Terms: San Diego-Coronado Bridge
• Uncontrolled Terms: Linear analysis; Seismic vulnerability
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00760125
• Record Type: Publication
• Files: TRIS, STATEDOT
• Created Date: Feb 3 1999 12:00AM