Title:
Interaction of Bridge Contraction Scour and Pier Scour in a Laboratory River Model

Simple item page
dc.contributor.advisor Sturm, Terry W.
dc.contributor.author Hong, SeungHo en_US
dc.contributor.committeeMember Landers, Mark M
dc.contributor.committeeMember Stieglitz, Marc
dc.contributor.department Civil and Environmental Engineering en_US
dc.date.accessioned 2006-01-18T22:20:28Z
dc.date.available 2006-01-18T22:20:28Z
dc.date.issued 2005-11-22 en_US
dc.description.abstract The engineering design of a hydraulic structure such as a river bridge requires consideration of the factors that affect the safety of the structure. Among them, one of the most important variables is bridge foundation scour. However, engineering experience seems to indicate that computation of scour depth using current scour formulas tends to overpredict scour in comparison to field measurements. The result can be an overdesigned bridge foundation that increases the cost of the bridge. One possible reason for the overprediction is the current practice of adding separate estimates of contraction scour and pier scour when in fact these processes occur simultaneously and interact. During the occurrence of a flood, velocities and depths increase but they are affected by changes in the distribution of discharge between the main channel and floodplain. In addition, the time history or time development of contraction scour and local pier scour is not the same. As a result, the influence of contraction scour on pier scour, for example, is time dependent. Laboratory experiments are proposed using a 1:45 scale hydraulic model of the Ocmulgee River bridge at Macon, Georgia. Initially, the contraction scour will be measured without the bridge piers in place. In this experiment, the time history of the scour and the velocity distributions at the equilibrium state will be measured. Then the piers will be placed at the bridge cross-section in the flume, and the same measurements will be made. The sensitivity of the measurements to small changes in depth at the same discharge will also be determined, and comparisons will be made with field measurements of scour depth. The results will be used to assess the relative contribution of contraction scour and local pier scour to the final design of the bridge foundation depth. en_US
dc.description.degree M.S. en_US
dc.format.extent 1851925 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/7533
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Interaction en_US
dc.subject Contraction scour
dc.subject Local scour
dc.title Interaction of Bridge Contraction Scour and Pier Scour in a Laboratory River Model en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 88639fad-d3ae-4867-9e7a-7c9e6d2ecc7c
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
hong_seungho_200512_mast.pdf
Size:
1.77 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Theses and Dissertations