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Rapid Estimation Method For Assessing Scour At Highway Bridges Based On Limited Site Data
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Book Synopsis Rapid-estimation Method for Assessing Scour at Highway Bridges Based on Limited Site Data by : Stephen R. Holnbeck
Download or read book Rapid-estimation Method for Assessing Scour at Highway Bridges Based on Limited Site Data written by Stephen R. Holnbeck and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data by : Steven R. Holnbeck
Download or read book Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data written by Steven R. Holnbeck and published by . This book was released on 1997 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data by : Stephen R. Holnbeck
Download or read book Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data written by Stephen R. Holnbeck and published by . This book was released on 1997 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data by : Steven R. Holnbeck
Download or read book Method for Rapid Estimation of Scour at Highway Bridges Based on Limited Site Data written by Steven R. Holnbeck and published by . This book was released on 1997 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bridge Scour Evaluation by : John Kattell
Download or read book Bridge Scour Evaluation written by John Kattell and published by . This book was released on 1998 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of HEC-18 Equations for NCHRP Abutment Scour Based on Kansas Field Data by : Jacob Andrew Ambrose
Download or read book Assessment of HEC-18 Equations for NCHRP Abutment Scour Based on Kansas Field Data written by Jacob Andrew Ambrose and published by . This book was released on 2013 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge failures are caused by many different failure mechanisms, not the least of which is scour. Scour occurs due to the erosion of streambed or bank material due to flowing water and is often considered as being localized. Recently the National Cooperative Highway Research Program (NCHRP) drafted a final report titled "Estimation of Scour Depth at Bridge Abutments, NCHRP 24-20." The method outlined in this document was adopted by HEC-18 as an alternative method for use in the estimation of scour depths due to abutment scour. This new method requires field review. The purpose of this report is to verify the validity of the NCHRP Abutment Scour Equations derived from laboratory studies. Given the requirement by several states to use the new method, finding the right equations to use for the design foundations becomes crucial. The advantage of this study is the abundant field data available for a comparison through the Kansas Department of Transportation project headed by TranSystems. A subset of the bridges is tested with the equations and comparisons are made.
Book Synopsis Determination of Scour Susceptibility Through Rapid Assessment by : Aaron Dwight Moore
Download or read book Determination of Scour Susceptibility Through Rapid Assessment written by Aaron Dwight Moore and published by . This book was released on 2012 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: A need existed to efficiently predict the potential scour that could be expected at nearly 20,000 existing off-system bridges in the State of Kansas to assign a National Bridge Inspection Standards (NBIS) Item 113 coding. A customized methodology for scour evaluation was developed through the guidance of TranSystems Corporation, The Kansas Department of Transportation, and the Federal Highway Administration. This thesis presents a procedure to rapidly assess the scour potential at existing bridges. This procedure consists of a prioritization method and routines to rapidly estimate scour components outlined in FHWA guidelines. Key to the successful implementation of this procedure is all information including bridge plans, historic inspection records, historic photographs, and current photographs were digitized, geo-referenced, and incorporated into GIS software. This procedure was validated on approximately 300 bridges and, at the time this report was written, has been applied to over 8,000 existing off-system bridges in the State of Kansas. The procedure was beneficial because it is repeatable, the information is easily obtained at a relatively low cost, it requires multiple sets of eyes on every bridge, it is efficient, it accounts for the main scour components outlined within HEC-18, and the results show good correlation with HEC-18 results. Although this procedure was developed for use in the state of Kansas, it may be applicable for use in other states. However, before doing so an evaluation of the site specific information should be performed and if necessary modifications should be made to the procedure to account for regional issues. The rapid assessment should only be administered by an Interdisciplinary Scour Team having expert knowledge with regards to structural, hydraulic, and geotechnical engineering.
Book Synopsis Estimated and Measured Bridge Scour at Selected Sites in North Dakota, 1990-97 by : Tara Williams-Sether
Download or read book Estimated and Measured Bridge Scour at Selected Sites in North Dakota, 1990-97 written by Tara Williams-Sether and published by . This book was released on 1999 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1997-07 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Geological Survey Open-file Report by :
Download or read book U.S. Geological Survey Open-file Report written by and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-resources Investigations Report by :
Download or read book Water-resources Investigations Report written by and published by . This book was released on 1996 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stream Stability and Scour at Highway Bridges by : Everett V. Richardson
Download or read book Stream Stability and Scour at Highway Bridges written by Everett V. Richardson and published by ASCE Publications. This book was released on 1999-01-01 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Evaluation of Similar Methods for Estimating Bridge Scour at Selected Sites in South Dakota by : Ryan L. Fosness
Download or read book Evaluation of Similar Methods for Estimating Bridge Scour at Selected Sites in South Dakota written by Ryan L. Fosness and published by . This book was released on 2007 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Total estimated bridge scour was estimated at 833 bridges in South Dakota from 2003 to 2006 by the U.S. Geological Survey as required by the U.S. Federal Highway Administration.
Book Synopsis Evaluation of Bridge-scour Data at Selected Sites in Ohio by : K. S. Jackson
Download or read book Evaluation of Bridge-scour Data at Selected Sites in Ohio written by K. S. Jackson and published by . This book was released on 1996 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Methods for Assessing Channel Conditions Related to Scour-critical Conditions at Bridges in Tennessee by :
Download or read book Methods for Assessing Channel Conditions Related to Scour-critical Conditions at Bridges in Tennessee written by and published by . This book was released on 1995 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction by : Peter Frederick Lagasse
Download or read book Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction written by Peter Frederick Lagasse and published by Transportation Research Board. This book was released on 2013 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 761: Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction presents a reference guide designed to help identify and evaluate the uncertainties associated with bridge scour prediction including hydrologic, hydraulic, and model/equation uncertainty. For complex foundation systems and channel conditions, the report includes a step-by-step procedure designed to provide scour factors for site-specific conditions."--Publisher's description.
Book Synopsis Evaluation of Pier-scour Equations for Coarse-bed Streams by : Katherine J. Chase
Download or read book Evaluation of Pier-scour Equations for Coarse-bed Streams written by Katherine J. Chase and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Streambed scour at bridge piers is among the leading causes of bridge failure in the United States. Several pier-scour equations have been developed to calculate potential scour depths at existing and proposed bridges. Because many pier-scour equations are based on data from laboratory flumes and from cohesionless silt- and sand-bottomed streams, they tend to overestimate scour for piers in coarse-bed materials. Several equations have been developed to incorporate the mitigating effects of large particle sizes on pier scour, but further investigations are needed to evaluate how accurately pier-scour depths calculated by these equations match measured field data. This report, prepared in cooperation with the Montana Department of Transportation, describes the evaluation of five pier-scour equations for coarse-bed streams. Pier-scour and associated bridge-geometry, bed-material, and streamflow measurement data at bridges over coarse-bed streams in Montana, Alaska, Maryland, Ohio, and Virginia were selected from the Bridge Scour Data Management System. Pier scour calculated using the Simplified Chinese equation, the Froehlich equation, the Froehlich design equation, the HEC-18/Jones equation and the HEC-18/Mueller equation for flood events with approximate recurrence intervals of less than 2 to 100 years were compared to 42 pier-scour measurements. Comparison of results showed that pier-scour depths calculated with the HEC-18/Mueller equation were seldom smaller than measured pier-scour depths. In addition, pier-scour depths calculated using the HEC-18/Mueller equation were closer to measured scour than for the other equations that did not underestimate pier scour. However, more data are needed from coarse-bed streams and from less frequent flood events to further evaluate pier-scour equations.
