Mechanics of Local Scour Part II PDF Download

Author: S. S. Karaki
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 51

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Book Description

Author: S. S. Karaki
Publisher:
ISBN:
Category : Scour and fill (Geomorphology)
Languages : en
Pages : 60

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Book Description

Author: V. R. Schneider
Publisher:
ISBN:
Category : Scour at bridges
Languages : en
Pages : 362

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Book Description

Author: B. Mutlu Sumer
Publisher: World Scientific
ISBN: 9789810249304
Category : Science
Languages : en
Pages : 558

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Book Description
Treats the subject of local sour around different kinds of marine structures, exposed to waves and/or currents.

Author: Susan Burns
Publisher:
ISBN: 9780784411476
Category :
Languages : en
Pages : 1152

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Book Description

Author: G.J.C.M. Hoffmans
Publisher: CRC Press
ISBN: 1000347303
Category : Technology & Engineering
Languages : en
Pages : 342

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Book Description
Ever since the publication in 1997 the original Scour Manual has helped many practising hydraulic engineers to deal with scour processes near hydraulic structures. In recent years new insights, such as probabilistic calculations, offered new opportunities to design structures more economically. These new insights are included in this update of the original Scour Manual, which is focussing entirely on current-related scour. This manual provides the engineer with useful practical methods to calculate the dimensions of scour holes in the pre-feasibility and preliminary stages of a project, and gives an introduction to the most relevant literature. This updated Scour Manual contains guidelines that can be used to solve problems related to scour in engineering practice and also reflects the main results of all research projects in the Netherlands in recent decades. The so-called Breusers equilibrium method has a central role, which can basically be applied to all situations where local scour is expected. The method allows to predict the scour depth as a function of time, provided that the available knowledge about scour at the specific structure is sufficient. For structures with insufficient knowledge available, alternative scour prediction rules are presented. The treatment of local scour is classified according to the different types of structures. Each type of structure is necessarily schematised to a simple, basic layout. The main parameters of a structure and the main parts of the flow pattern near a structure are described briefly insofar they are relevant to the description of scour phenomena. New scour formulas for the equilibrium scour have been elucidated. Evaluating a balance of forces for a control volume, it is possible to develop scour equations for different types of flow fields and structures, i.e. jets, abutments and bridge piers. As many scour problems are still not fully understood, attention is paid to the validity ranges and limitations of the formulas, as well as to the accuracy of the scour predictions. This information can also be used to carry out a risk assessment using a safety philosophy based on a probabilistic analysis or an approach with a safety factor. Moreover, the information on the strength of soils is extended and aspects are addressed such as scour due to shear failures or flow slides, that can progressively damage the bed protection which might lead to the failure of hydraulic structures. This updated Scour Manual presents scour prediction methods and deals with practically related scour problems. Consultants and contractors were invited to provide case studies of realized projects, including the methods that were followed. These case studies will help with grasping the concept of scour by the flow of water. This manual provides the engineer with the latest knowledge and with case studies that show how to apply the formulas and their limitations.

Author: Hsieh Wen Shen
Publisher:
ISBN:
Category : Scour at bridges
Languages : en
Pages : 28

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Book Description

Author: Kaleem Afzal
Publisher: GRIN Verlag
ISBN: 3346109496
Category : Science
Languages : en
Pages : 55

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Book Description
Bachelor Thesis from the year 2019 in the subject Physics - Mechanics, University of Engineering & Technology Peshawar, language: English, abstract: The objective of the study is to conduct laboratory model testing to investigate and compare scour hole depth of the diamond, square and elliptical scaled model of bridge piers in a cohesion less bedding material under clear water and to propose the most efficient cross section of the bridge pier, having less Local scour around piers under steady clear-water condition was studied experimentally for a variety of configuration, including different sizes and shapes of piers. Total number of forty experiments were performed in the flume using diamond, square and elliptical shape. The scouring around the square shape was found maximum and at elliptical shape was the least. The main reason was obstruction in flow area that was more in case of the square and less in case of the elliptical shape. However, the diamond shaped has the intermediate scouring under same condition. Local scour is a complex phenomenon involving three-dimensional flow, typically developed around piers founded in movable bed rivers. Local scour can lead to partial failure or to collapse of bridge piers because of the high flood velocity. The cost of large bridges, with common and special complex piers, justifies carrying out an accurate prediction of scour depth, for both economic and safety reasons, which in turn leads to the interest of hydraulic engineers in predicting the equilibrium scour depth.

Author: National Program for Research and Development in Highway Transportation
Publisher:
ISBN:
Category : Transportation, Automotive
Languages : en
Pages : 352

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Book Description

Author: Bruce W. Melville
Publisher: Water Resources Publication
ISBN: 9781887201186
Category : Technology & Engineering
Languages : en
Pages : 586

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Book Description
"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.