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ISSN : 1026-3098
e-ISSN : 2345-3605
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Publication Information : Volume 22 - Number 3 - Successive Number 3
Type : Article
Topics of Paper : Transaction on Civil Engineering
English Title : Extent of riprap layerwith different stone sizes around rectangular bridge piers with or without an attached collar
English Abstract : In the present study, extent of riprap layer with different sizes around bridge piers is investigated. Rectangular piers with or without an attached protective collar aligned with the flow and skewed at different angles are tested. The optimal configurations of riprap extent for each pier condition with different sizes are determined. Experiments showed that in case of aligned rectangular pier without a collar only 8% of the area around the pier is critical and the remaining 92% area can be protected with about 60% smaller riprap stones. As the skew angle of the pier increases up to 20o, the critical area increases up to 23% of the riprap extent. In case of protected pier with collar, the collar prevents the critical region around the pier in aligned and 5o skewed pier. However, by increasing the flow attack angle up to 20o, only a small area up to 30% in the riprap extent around the collar is critical and the remaining area can be placed with 40% smaller riprap size. Finally, the design algorithm for riprap extent with different sizes is presented.
English Keywords : Local scour, Rectangular bridge pier, Critical region, Riprap extent, Collar, Riprap sizing
Refrences :
Number Of Pages :
From 709 to 716


Authors :
The AuthorAuthor SequenceOrganizationOrganization ( english )AffiliationEmailEducation
M. Karimaee Tabarestani
(Author)
1Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran    
Prof. A. R. Zarrati 2Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran ProfessorZarrati@aut.ac.ir 
M. B. Mashahir 3Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran    
E. Mokallaf 4Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran    
Published Issues
2017
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Industrial Engineering
2016
2015
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology
2014
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology
2013
Transactions on Civil Engineering
Transactions on Mechanical Engineering
Transactions on Chemistry and Chemical Engineering
Transactions on Computer Science & Engineering and Electrical Engineering
Transactions on Industrial Engineering
Transactions on Nanotechnology

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