Report on Techniques for Bridge Strengthening. Design Example – Stringer Retrofit - Composite Action and Continuity Changes.

Ahlskog, C.; United States. Federal Highway Administration. Office of Infrastructure

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Report on Techniques for Bridge Strengthening. Design Example – Stringer Retrofit - Composite Action and Continuity Changes.

2018-09-01
By Ahlskog, C.

[PDF-1.87 MB]

English

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Details:

Creators:

Ahlskog, C.
Corporate Creators:

United States. Federal Highway Administration. Office of Infrastructure
Corporate Contributors:

Modjeski and Masters
Subject/TRT Terms:

[+]

Bridge Design Bridges Composite Materials Retrofitting Strengthening (Maintenance)
Publication/ Report Number:

FHWA-HIF-18-044
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Highway Administration. Office of Infrastructure
Abstract:

This example involves the replacement of stringers during re-decking on an existing truss/floorbeam/stringer bridge. The existing stringers are non-composite rolled W24x76 beams, that were designed for HS-20 live loads. The design criteria is to provide new stringers to obtain a HS-25 live load rating factor equal to or greater than 1.0, while minimizing the weight of the new stringers. The flexural live load ratings of the new stringers were significantly increased by both making the stringers composite with the new deck and changing the continuity of the stringer spans. This example only involves a study of the flexural resistance of a typical interior span for the new and existing stringers using the Strength-I Limit State. This example is based on AASHTO LRFD Bridge Design Specifications, 7th Edition.
Format:

PDF
Funding:

DTFH61-11-H-00027
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:8011f0e060d9c63d43a7821d81aa1ed52931d68be364f325111788ec5a4f720c
Download URL:

https://rosap.ntl.bts.gov/view/dot/42821/dot_42821_DS1.pdf
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No Additional Files

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Report on Techniques for Bridge Strengthening. Design Example – Stringer Retrofit - Composite Action and Continuity Changes.

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