Wind induced torsional fatigue behavior of truss bridge verticals Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/1g05fg13w

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The Astoria-Megler Bridge is a 6.6 kilometer (4.1 mile) long bridge, connecting Oregon and Washington on US 101, with a continuous steel truss main span of 376 m (1232 ft). It is the second longest main span bridge of this type in the world. Due to vortex shedding, some of the long truss verticals exhibit wind-induced torsional vibrations. These vibrations can create large numbers of repeated stress cycles in the truss verticals and the gusset plate assemblies. The members and connections were not designed for such conditions and the impact of this behavior on the service life of the bridge is uncertain. A full-scale representation of one of the truss verticals observed to exhibit such wind induced torsional response was fabricated and tested in the Structural Engineering Research Laboratory at Oregon State University. Experimental data of the rotational behavior and the stress distribution along the vertical were collected using inclinometers, an angular rate sensor, and uniaxial and rosette strain gages. The data collected were compared with existing analytical methods and predictions from finite element models. The observed experimental results including twist angle, stress distribution, and stress magnitude were well captured by both the finite element model and the analytical equations. Using analytical expressions, the fatigue lives of the existing bridge verticals were predicted based on assumed storm duration and recurrence.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Philipp Keller (kellerp@onid.orst.edu) on 2012-06-21T21:50:14Z No. of bitstreams: 1 KellerPhilipp2012.pdf: 9179556 bytes, checksum: 0dbca9dc2ee05ece916a4286a4e27946 (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2012-06-28T22:25:11Z (GMT) No. of bitstreams: 1 KellerPhilipp2012.pdf: 9179556 bytes, checksum: 0dbca9dc2ee05ece916a4286a4e27946 (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2012-06-23T20:42:06Z (GMT) No. of bitstreams: 1 KellerPhilipp2012.pdf: 9179556 bytes, checksum: 0dbca9dc2ee05ece916a4286a4e27946 (MD5)
  • description.provenance : Made available in DSpace on 2012-06-28T22:25:11Z (GMT). No. of bitstreams: 1 KellerPhilipp2012.pdf: 9179556 bytes, checksum: 0dbca9dc2ee05ece916a4286a4e27946 (MD5) Previous issue date: 2012-06-13

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items