Verification of computer analysis models for suspension bridges.

Details

• Creators:
  Shinozuka, Masanobu ; Karmakar, Debasis ; Chaudhuri, Samit Ray ; Lee, Ho
• Corporate Creators:
  University of California, Irvine. Department of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Suspension bridges
  • Performance
  • California
  • Measurement
  • Testing
  • Computer simulation
  • Earthquake effects
  • Bridges
  • Live loads
• Publication/ Report Number:
  CA/UCI-VTB-2009
• Resource Type:
  Tech Report
• Geographical Coverage:
  California
• Corporate Publisher:
  California. Dept. of Transportation. Division of Research and Innovation
• Abstract:
  The Vincent Thomas Bridge, connecting Terminal Island with San Pedro, serves both Los Angeles ; and Long Beach ports, two busiest ports in the west coast of USA. The bridge carries an ; overwhelming number of traffic with an Annual Average Daily Traffic (AADT) volume of 45,500, ; many of which are cargo trucks. Based on the recent finding that the main span of the Vincent ; Thomas Bridge crosses directly over the Palos Verdes fault, which has the capacity to produce a ; devastating earthquake, the bridge underwent a major retrofit in spring 2000, mainly using visco­ ; elastic dampers. This study focuses on performance evaluation of the retrofitted bridge under ; seismic, wind and traffic loads. A member-based detailed three-dimensional Finite Element (FE) as ; well as panel-based simplified models of the bridge are developed. In order to show the ; appropriateness of these models, eigenproperties of the bridge models are evaluated and compared ; with the system identification results obtained using ambient vibration. In addition, model validation ; is also performed by simulating and comparing with the measured dynamic response during two ; recent earthquakes. FE model is also updated using a sensitivity-based parameter updating method. ; Effect of spatial variability of ground motions on seismic displacement and force demands is ; investigated. To record actual wind velocity and direction, three anemometers are installed at three ; different locations of the bridge. Response of the bridge is computed under wind velocity. Finally, ; analysis of the bridge under traffic load is also carried out.
  More +
• Format:
  PDF
• Funding:
  RTA-59A0496
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27633/dot_27633_DS1.pdf
• File Type:
  [PDF - 3.79 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:9737f11559024cf105870918c0283abe85684f5f9af6670c5428b58f594ea2e8