MARC 主機 00000nam 2200000 4500
001 AAI1497323
005 20121102113931.5
008 121102s2011 ||||||||s|||||||| ||eng d
020 9781124802343
035 (UMI)AAI1497323
040 UMI|cUMI
100 1 Calappi, Timothy
245 10 Developing a family of curves for the HEC-18 scour
equation
300 26 p
500 Source: Masters Abstracts International, Volume: 50-01,
page: 0522
500 Adviser: Carol J. Miller
502 Thesis (M.S.)--Wayne State University, 2011
520 Accurate pier scour predictions are essential to the safe
and efficient design of bridge crossings. Current practice
uses empirical formulas largely derived from laboratory
experiments to predict local scour depth around bridge
piers. The resulting formulas are hindered by insufficient
consideration of scaling effects and hydrodynamic forces.
When applied to full-scale designs, these formula
deficiencies lead to excessive over prediction of scour
depths and increased construction costs
520 In an effort to improve the predictive capabilities of HEC
-18, this work uses field-scale data and nonlinear
regression to develop a family of equations optimized for
various non-cohesive soil conditions. Improving the
predictive capabilities of well-accepted equations saves
scarce project dollars without sacrificing safety. To help
improve acceptance of modified equations, this work
strives to maintain the familiar form of the HEC-18
equation. When compared to the HEC-18 local pier scour
equation, this process reduces mean square error while
maintaining over prediction
590 School code: 0254
650 4 Engineering, Civil
690 0543
710 2 Wayne State University.|bCivil Engineering
773 0 |tMasters Abstracts International|g50-01
856 40 |uhttps://pqdd.sinica.edu.tw/twdaoapp/servlet/
advanced?query=1497323
912 PQDT
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