United States Department of Transportation
i
Load and Resistance Factor Rating Methodology Recommendations for Missouri Bridges
-
2024-11-01
-
[PDF-3.69 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report (June 2021-December 2023)
-
Corporate Publisher:
-
Abstract:Traditionally, MoDOT performed bridge load ratings using the Load Factor Rating (LFR) methodology. With the adoption of Load and Resistance Factor Design based Load and Resistance Factor Rating (LRFR) methodology, MoDOT is migrating to LRFR for rating bridges. The primary goal of this study is to develop and recommend load posting policies using the LRFR methodology consistent with the current LFR policy. The goal was accomplished using MoDOT-provided information on approximately one hundred reinforced concrete, prestressed concrete, and steel bridges each, and about thirty concrete culverts throughout the state and in different commercial zones. The research conducted to compare the two rating methodologies has shown that the LFR and LRFR methodologies of rating differ in (a) bridges rated in LFR govern in interior girders while with the LRFR method, most bridges will govern in the exterior girders; (b) LRFR ratings are lower than the LFR ratings; (c) the number of posted bridges increased for LRFR over those required to be posted by LFR. This points to a necessary change associated with the LRFR posting threshold to meet the current practice used by MoDOT. Recommendations based on the study of the various objectives applicable to each of the bridge/culvert types have been provided in this report.
-
Content Notes:Supporting documents include an appendix.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
