Results 281 to 290 of about 145,008 (321)

Clear Water Scour at Circular Piers: a Model

Journal of Hydraulic Engineering, 1995
The three-dimensional quasi-steady vortex flow field around circular piers in a quasi-equilibrium scour hole under a clear water regime has been investigated experimentally. The main characteristic features of the flow, to be modeled, are a relatively large secondary vortex flow within the scour hole and skewed velocity distributions along the ...
Subhasish Dey, Sujit K. Bose, Ghandikota L. N. Sastry   +2 more
openaire   +1 more source

Pier scour in clear water for sediment mixtures

Journal of Hydraulic Research, 2012
The current pier scour design in the USA is mainly based on the CSU equation, yet a recent incisive evaluation indicates a need to change it because substantial advances were made in the last two decades for understanding the pier scour processes. The objective of this research is then to propose a simplified scour mechanism and a physically-based ...
openaire   +1 more source

Experimental Investigation of Clear-Water Local Scour of Compound Piers

Journal of Hydraulic Engineering, 2009
Local scour around complex piers under steady clear-water condition was studied experimentally for a variety of configuration, including different sizes and shapes of complex piers. A total of 70 experiments were carried out. Three sets of experiments were performed over the entire range of possible pile cap elevations for complex piers with different ...
B. Ataie‐Ashtiani, Z. Baratian‐Ghorghi, A. A. Beheshti   +2 more
openaire   +1 more source

Clear-Water Scour at Abutments in Thinly Armored Beds

Journal of Hydraulic Engineering, 2004
Experiments on local scour at short abutments (ratio of abutment length to approaching flow depth less than unity), namely vertical-wall, 45° wing-wall, and semicircular, embedded in a bed of relatively fine noncohesive sediment overlain by a thin armor-layer of coarser sediment, were conducted for different flow conditions, thickness of armor-layers ...
Subhasish Dey, Abdul Karim Barbhuiya
openaire   +1 more source

Effect of abutment aspect ratio on clear‐water scour in floodplains

Rivers Research and Applications: an international journal devoted to river research and management, 2019
Scour around abutments is recognized as one of the main reasons of bridge foundations failure. This paper presents the experimental results of the effects of abutment width and length on the scour development up to its equilibrium condition around 45 ...
A. Abdelaziz, Siow‐Yong Lim
semanticscholar   +1 more source

Equilibrium Clear-Water Scour around an Abutment

Journal of Hydraulic Engineering, 1997
The author presents a semiempirical analysis of equilibrium local clear-water scour at a bridge abutment that is based on the flow-continuity equation, scour geometry, and a generalized form of the power-law formula for flow resistance in an alluvial channel.
openaire   +1 more source

Clear‐Water Scour around Bridge Pier Group

Journal of Hydraulic Engineering, 1994
Recent attempts have been made to reduce scour around solid circular piers. Such attempts use riprap, a circular collar around, a rectangular slot through, and a delta wing‐like fin ahead of piers. Providing another scour reduction device, the present paper replaces the solid pier by a group of three smaller piers.
Nandana Vittal, U. C. Kothyari, Morteza Haghighat   +2 more
openaire   +1 more source

Temporal Evolution of Clear-Water Pier and Abutment Scour

Journal of Hydraulic Engineering, 2002
Scour related to bridge hydraulics received much attention in the past decade, including its relation to flood hydrology and hydraulic processes in addition to steady flow. This paper presents new research on bridge pier and abutment scour based on a large data set collected at ETH Zurich, Switzerland.
OLIVETO, Giuseppe, W. H. HAGER
openaire   +3 more sources

An investigation of general clear-water scour in a long contraction

2022
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
openaire   +1 more source

Clear-water scour at submerged pile groups

2013
Groups of piles are frequently used as bridge foundations. Different group configurations, characterized by different pile spacing, skew-angle, number, and arrangement of pile group columns interact differently with the flow field and lead to different scour patterns and equilibrium scour depth.
Rui Lança, Cristina Fael, Rodrigo Maia, João P. Pêgo, António H. Cardoso   +4 more
openaire   +1 more source