Measurement-Based Evaluation of Noncomposite Steel Girder Bridges

Jauregui, David V.; Yura, J. A.; Frank, Karl H.; Wood, Sharon L.; Jirsa, James O.; University of Texas at Austin. Center for Transportation Research

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Measurement-Based Evaluation of Noncomposite Steel Girder Bridges

2000-02-01
By Jauregui, David V. ; Yura, J. A. ; Frank, Karl H. ; ...

[PDF-4.69 MB]

English

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Creators:

Jauregui, David V. ; Yura, J. A. ; Frank, Karl H. ; Wood, Sharon L. ; Jirsa, James O.

Jauregui, David V. ; Yura, J. A. ; Frank, Karl H. ; Wood, Sharon L. ; Jirsa, James O. Less -
Corporate Creators:

University of Texas at Austin. Center for Transportation Research
Corporate Contributors:

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration

Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Action Bearing Capacity Bearing Restraint Bridge Rating Deck/Curb Participation Girder Bridges Live Loads Load Distribution Load Limits Overload Effects Proof/Diagnostic Load Testing Ratings Steel Bridges Unintended Partial Composite
Publication/ Report Number:

FHW A/TX-0-1746-1
Resource Type:

Tech Report
Geographical Coverage:

Texas
Corporate Publisher:

Texas. Dept. of Transportation. Research and Technology Implementation Office
Abstract:

The results from an experimental study into the behavior of noncomposite slab-on-steel girder bridges are presented. Two bridge units were tested under increasing static loads beyond first yield of the girders with a flatbed trailer loaded with concrete barriers. The load tests were unique in that dump trucks were applied between trailer load cycles to monitor the effect of overloads on the bridge response. Measured deformations included strain, vertical deflection, and girder-slab slip. Lateral load distribution was evaluated experimentally by expressing the bending moment in each girder section (derived from the measured strains) as a percentage of the total bridge moment. The strain derived bridge moment was lower than the statical bridge moment due in part to bearing restraint and deck stiffness. Measured distribution factors compared well with finite element analysis but were below empirical factors from AASHTO Standard (1996) and LRFD (1998) Specifications. There was better agreement with the LRFD-based values. The heavy trailer loads bad no significant impact on the load distribution and partial composite action of the girders. More significant changes occurred between different transverse load positions of the dump truck. A proposed experimental bridge rating process was developed that consists of a hierarchy of steps of increasing complexity and effort, some of which do not require load testing. The process terminates once a satisfactory rating is achieved. Procedures for using measured distribution factors and section moduli for the girders to improve the AASHTO Allowable Stress and Load Factor ratings are given.
Format:

PDF
Funding:

Research Project 0-1746
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:8529191fb9b97804eb6d9dc0710bfc3d6ec66041971d386499f6507297c58cb1
Download URL:

https://rosap.ntl.bts.gov/view/dot/31388/dot_31388_DS1.pdf
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Measurement-Based Evaluation of Noncomposite Steel Girder Bridges

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