Dynamic and Static Behavior of a Curved-Girder Bridge with Varying Boundary Conditions

A curved, three-span continuous, steel I-girder bridge in Salt Lake City was tested in order to determine its dynamic and static load carrying properties for three boundary condition states. For each of the three boundary condition states, two dynamic forced vibration methods were applied to the bridge as well as a static live-load test. The first forced vibration method used an eccentric mass shaker. The second method involved striking the side of the bridge with an impact hammer. The live-load test was performed by slowly driving a truck at a crawl speed across the bridge. Velocity transducers, accelerometers, and strain gauges were utilized to record the response of the bridge. The analysis and compilation of recorded dynamic response of the bridge enabled the preparation of mode shapes and natural frequencies for each boundary condition. This paper discusses the resulting changes in relevant dynamic properties and compares them with the changes in the static properties that were determined from the bridge response recorded from the live-load tests.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08873828
• Authors:
  • Mertlich, Tyler B
  • Halling, Marvin W
  • Barr, Paul J
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 185-192
• Serial:
  • Journal of Performance of Constructed Facilities
  • Volume: 21
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 0887-3828
  • Serial URL: http://ascelibrary.org/toc/jpcfev/27/1

Subject/Index Terms

• TRT Terms: Accelerometers; Dynamic loads; Eccentricity; Live loads; Static loads; Steel bridges; Strain gages; Velocity
• Uncontrolled Terms: Boundary conditions; Dynamic response; Forced vibration; I-girders; Impact hammer method
• Geographic Terms: Salt Lake City (Utah)
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01051709
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 13 2007 5:26PM