Evaluation Of Bridge Scour Research
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Evaluation Of Bridge Scour Research
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Author : Robert Ettema
language : en
Publisher:
Release Date : 2011
Evaluation Of Bridge Scour Research written by Robert Ettema and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Bridges categories.
This report explores the current state of knowledge regarding bridge pier scour, assesses several methods for design estimates of scour depth, examines a structured methodology for scour depth estimation for design purposes, and highlights aspects of pier scour in need of potential further research.
Evaluation Of Bridge Scour Research
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Author :
language : en
Publisher:
Release Date : 2012
Evaluation Of Bridge Scour Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Bridges categories.
This digest summarizes key findings of three National Cooperative Highway Research Program (NCHRP) projects: Project 24-27(01) - Evaluation of Bridge Scour Research: Pier Scour Processes and Predictions; Project 24-27(02) - Evaluation of Bridge Scour Research: Abutment and Contraction Scour Processes and Predictions; and Project 24-27(03) - Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions. These projects had the common objectives to (1) critically evaluate the body of bridge scour research completed worldwide since the early 1990s and (2) propose specific research results for adoption by AASHTO in its development of future editions of two key highway hydraulic engineering guidance documents: Policy for Design of Highway Drainage Facilities and Recommended Procedures for Design of Highway Drainage Facilities.The digest is based on project final reports available as NCHRP Web-Only Documents 175, 181, and 177, respectively.
Nchrp Web Only Document 181
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Author :
language : en
Publisher:
Release Date : 2011
Nchrp Web Only Document 181 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Pier Scour In Clear Water Conditions With Non Uniform Bed Materials
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Author : U. S. Department Transportation
language : en
Publisher: CreateSpace
Release Date : 2015-03-14
Pier Scour In Clear Water Conditions With Non Uniform Bed Materials written by U. S. Department Transportation and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-14 with categories.
Hydraulics and scour hazards cause over half of the bridge failures in the United States and have been identified by State bridge authorities as one of the top issues in bridge design and maintenance. Current pier scour design in the United States is mainly based on the Colorado State University (CSU) equation, which is described in Hydraulic Engineering Circular No. 18 (HEC-18). A recent evaluation of bridge scour research indicated a need to change the current method because substantial advances have been made in understanding pier scour processes. The evaluation compared several methods and considered which methods effectively included the variables now believed to determine pier scour characteristics. The objective of this report is to describe a new method for estimating pier scour based on an understanding of the flow-structure-sediment interactions and to address the weaknesses in earlier methods. This research focuses on clear-water scour at singular piers in non-cohesive sediment mixtures. The approach was to review previous pier scour methods, formulate an improved model for scour formation, and evaluate the new model using laboratory and field data.
Evaluation Of Bridge Scour Data At Selected Sites In Ohio
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Author : K. S. Jackson
language : en
Publisher:
Release Date : 1996
Evaluation Of Bridge Scour Data At Selected Sites In Ohio written by K. S. Jackson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Scour at bridges categories.
Scour data collected during 1989-1994 were evaluated to determine whether pier scour and contraction scour occurred at 22 bridge sites in Ohio. Pier-scour depths computed from selected pier-scour prediction equations were compared with measured pier-scour depths, and the accuracy of the prediction equations were evaluated. Observed pier-scour relations were compared to similar relations developed through laboratory research. Mean streambed elevations were evaluated to determine the depth of contraction scour. Channel stability was assessed by use of mean streambed elevations at the approach section. Ground-penetrating radar was used at all sites to investigate the presence of historical scour.
Stream Stability And Scour At Highway Bridges
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Author : Everett V. Richardson
language : en
Publisher: ASCE Publications
Release Date : 1999-01-01
Stream Stability And Scour At Highway Bridges written by Everett V. Richardson and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-01-01 with Technology & Engineering categories.
Sponsored by the Water Resources Engineering (Hydraulics) Divsion of ASCE. This collection contains 75 papers and 321 abstracts presented at conferences sponsored by the Water Resources Engineering (Hydraulics) Division of ASCE from 1991 through 1998. The collection contains many new and expanded versions of the original papers and is designed to assist the practitioner with the concepts in evaluating stream instability and scour at bridges. Topics include: history of bridge scour research; bridge scour determination; stream stability and geomorphology; construction scour; instrumentation for measuring and monitoring; field measurement; computer and physical modeling of bridge scour; scour at culverts; and economic and risk analysis. One important paper contains 384 field measurements of local scour at piers made by the U.S. Geological Survey.
Scour And Erosion
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Author : Susan Burns
language : en
Publisher:
Release Date : 2014
Scour And Erosion written by Susan Burns and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Bridge Scour Evaluation
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Author : John Kattell
language : en
Publisher:
Release Date : 1998
Bridge Scour Evaluation written by John Kattell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Scour at bridges categories.
Bridge Scour
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Author : Bruce W. Melville
language : en
Publisher: Water Resources Publication
Release Date : 2000
Bridge Scour written by Bruce W. Melville and has been published by Water Resources Publication this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Technology & Engineering categories.
"A comprehensive state-of-the-art treatment of scour and bridge foundations - both a handy reference text and a manual for the practicing bridge designer."--Publisher.
A Critical Evaluation Of Bridge Scour For Michigan Specific Conditions
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Author : Donald D. Carpenter
language : en
Publisher:
Release Date : 2011
A Critical Evaluation Of Bridge Scour For Michigan Specific Conditions written by Donald D. Carpenter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Bridges categories.
The overall goal of this research was to improve MDOT's bridge scour prediction capability. In an effort to achieve this goal, the research team evaluated scour prediction methods utilized by state DOTs, conducted a field data collection project, and proposed an alternative approach for pier scour prediction. Nine locations and twelve unique spans were selected for monitoring. During the investigation, seven episodic measurements resulted in detectable pier scour. Scour depths ranged from 0.7 to 1.5 feet with the maximum return period corresponding to a seven-year flood event. No detectable scour events occurred at the continuous scour monitoring locations. This investigation also included the use of a Jet Erosion Test (JET) to experimentally determine if in-situ soil conditions could be correlated with measured bridge scour.