Details:

Creators:
Goslin, Keenan ; Davids, Bill
Goslin, Keenan ; Davids, Bill Less -
Corporate Creators:
University of Maine. Advanced Structures and Composites Center
Subject/TRT Terms:
[+]
Live Loads Load Tests Ratings Reinforced Concrete Bridges
Publication/ Report Number:
ME 14-13
Resource Type:
Tech Report
Geographical Coverage:
Maine
Corporate Publisher:
Maine. Dept. of Transportation
Abstract:
Five cast-in-place concrete T-beam bridges – Eustis #5341, Whitefield #3831, Cambridge #3291, Eddington #5107,

and Albion #2832 – were live load tested. Revised load ratings were computed either using test data or detailed

analysis when possible. In four of the five bridges, increases in rating factors were made through analysis alone. The

Cambridge bridge was shown to have HL-93 operating rating factors greater than 1.0 for both shear and moment

without testing. Additionally, gains are presented for two of the five bridges (Eustis and Whitefield) where test

data was used to compute an adjustment factor K for midspan bending, where the revised rating factor equals K x

RF. Adjustment factors were found to be 1.61 and 1.24 for Eustis and Whitefield, increasing their flexural rating

factors to 1.14 and 1.06 if accepted by the Maine DOT. Similarly, our analyses indicate that Eustis has a rating

capacity greater than 1.0 for shear. While Whitefield has a rating factor greater than 1.0 for shear at the supports, the

rating factor for shear near the termination of the bent-up reinforcing is 0.48 based on our analyses.

Low loads used in the live load tests of both Albion and Eddington, where only one truck was provided on site,

preclude the development of revised rating factors based on the test data. However, both of these structures did

exhibit better-than-expected live load distribution. Further, analysis of the Albion bridge indicates that the

consultant-provided load ratings for this structure can likely be increased significantly.

Use of these revised load ratings, live load test data, and extrapolation of these results to other structures is at the

sole discretion of the bridge owner.

The objective of this study, to implement an effective live load testing bridge program, was fulfilled


Format:
PDF
Funding:
20130102*2462
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:a44255b9c6cbce52744d2476cac7d96c7c23f0cca2840e26c24adfab70177041
Download URL:
https://rosap.ntl.bts.gov/view/dot/28487/dot_28487_DS1.pdf
File Type:

Supporting Files

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