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NCHRP 15-29 [Final]
Recommended Design Specifications for Live Load Distribution to Buried Structures
| Project Data |
| Funds: |
$350,000 |
| Research Agency: |
CNA Consulting Engineers |
| Principal Investigator: |
Charles Nelson |
| Effective Date: |
4/21/2005 |
| Completion Date: |
4/27/2009 |
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NCHRP Report 647 provides recommendations to revise the AASHTO LRFD Bridge Design Specifications relating to the distribution of live load to buried structures. The report details the development of simplified design equations (SDEs) for structural response based on three-dimensional (3D) analysis of 830 buried culverts. In addition, the report provides guidelines for conducting 2D and 3D modeling for design situations with conditions that not covered by the SDEs. The material in this report will be of immediate interest to roadway and bridge designers.
The objective of this project was to develop (1) recommended revisions to the AASHTO LRFD Bridge Design Specifications relating to the distribution of live load to buried structures, and (2) refined methods for analyzing for the distribution of live load to buried structures, including selection of an appropriate soil models.
This research was managed by Charles R. Nelson and Lee Petersen, CNA Consulting Engineers, in Minneapolis, Minnesota, with the assistance of Timothy J. McGrath, Simpson, Gumpertz & Heger, Inc., Massachusetts.
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