Unified Approach for LRFD Live Load Moments in Bridge Decks Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/2z10wr02p

This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Society of Civil Engineers and can be found at:  http://ascelibrary.org/toc/jbenf2/current.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Current AASHTO-LRFD specifications use many disparate design provisions to establish live load demands in bridge decks. As an example, approximately 17% of Chapter 4 addresses the analysis of decks. One of the AASHTO-LRFD analysis methods for decks uses an orthotropic plate model. The present AASHTO-LRFD orthotropic plate model has a single formulation for the plate torsional stiffness, and this is not generally applicable to all deck types. In this paper, new analytical expressions are developed for moment in bridge decks subjected to arbitrary patch loading considering each of the three cases of orthotropy: (1) relatively torsionally stiff, flexurally soft decks; (2) relatively uniformly thick decks (such as a reinforced concrete deck); and (3) relatively torsionally soft, flexurally stiff decks. Using these newly developed expressions, the AASHTO-LRFD notional live load models were combined with impact, multiple presence, and live load factors to determine maximum strong direction live load moments for the Strength I design limit state. Design equations were developed to estimate the maximum strong direction live load moments without performing cumbersome moving load analysis for common deck orientations. Using the proposed formulations, bridge deck strength design demands can now be treated in a unified way across different deck types using only four equations. Application of these methods can significantly reduce and simplify the analysis of decks and allow bridge engineers to make comparisons across different deck design alternatives.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Higgins, C., Tugrul Turan, O., Connor, R., and Liu, J. (2011). ”Unified Approach for LRFD Live Load Moments in Bridge Decks.” Journal of Bridge Engineering. 16, SPECIAL ISSUE: AASHTO-LRFD Bridge Design and Guide Specifications: Recent, Ongoing, and Future Refinements, 804–811. doi: 10.1061/(ASCE)BE.1943-5592.0000217
Academic Affiliation
Series
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-09-19T21:55:28Z (GMT). No. of bitstreams: 1 HigginsChristopherCivilConstructionEngineeringUnifiedApproachLRFD.pdf: 910553 bytes, checksum: c883f93e084339e89e755edaef18bfbf (MD5) Previous issue date: 2011-11
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-09-19T00:34:53Z No. of bitstreams: 1 HigginsChristopherCivilConstructionEngineeringUnifiedApproachLRFD.pdf: 910553 bytes, checksum: c883f93e084339e89e755edaef18bfbf (MD5)
  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2012-09-19T21:55:28Z (GMT) No. of bitstreams: 1 HigginsChristopherCivilConstructionEngineeringUnifiedApproachLRFD.pdf: 910553 bytes, checksum: c883f93e084339e89e755edaef18bfbf (MD5)

Relationships

In Administrative Set:
Last modified: 07/13/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items