Experimental Study of the Phenomenon of Local Scour Around Bridge Piers PDF Download
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Author: Nangantani Davies Godfrey Mtundu
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
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Book Description
Author: Nangantani Davies Godfrey Mtundu
Publisher:
ISBN:
Category :
Languages : en
Pages : 218
Get Book Here
Book Description
Author: Nangantani Davies Godfrey Mtundu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Magdy Mohamed Hosny
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 354
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Book Description
Author: Jueyi Sui
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0
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Book Description
A precise prediction of maximum scour depth (MSD) around piers under ice-covered conditions is crucial for the safe design of the bridge foundation. Due to the lack of information for local scour under ice-covered flow condition, it is extremely hard to give proper estimation of MSD. In the current study, a set of flume experiments were completed to investigate local scour around four pairs of circular bridge piers with nonuniform bed materials under open channel, smooth and rough ice cover conditions. Three different bed materials with median particle size of 0.47, 0.50, and 0.58 mm were used to simulate natural river conditions. Regardless of pier size, the maximum scour depths were observed in front of the piers under all flow conditions. Additionally, a smaller pier size and a larger space between piers yield a smaller scour depth. Results showed that the maximum scour depth decreases with increase in the grain size of armor layer. The distribution of vertical velocity shows that the strength of downfall velocity is the greatest under rough ice cover. Empirical equations were developed to estimate the maximum scour depth around side-by-side bridge piers under both open-channel and ice-covered flow conditions.
Author: Kai Tze Kho
Publisher:
ISBN:
Category :
Languages : en
Pages : 228
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Author: Mohammad Reza Namaee
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Local scour around piers and abutments is one of the main causes of the collapse of many bridges constructed inside rivers. Many researchers have conducted various studies to predict the maximum depth of a scour hole around bridge piers and abutments. However, most of them have been done in small-scale laboratory flumes and specifically for the open channel condition. Besides, most of the existing research on bridge piers uses uniform sediment which is not an appropriate representative of natural river systems. This can result in excessively conservative design values for scour in low risk or non-critical hydrologic conditions. The most severe cases of bridge pier scouring occur in cold regions when the surface of water turns into ice in which, an additional boundary layer is being added to the water surface, which leads to significant changes in the flow field and scour pattern around bridge piers. Ice cover also causes the maximum flow velocity to move closer to the channel bed.
Author: T−ojir−o Ishihara
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 342
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Author: Fred M. Chang
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 63
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Author: Vincenza Cinzia Santoro
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 284
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Book Description
Author: H.N.C. Breusers
Publisher: CRC Press
ISBN: 1000108503
Category : Technology & Engineering
Languages : en
Pages : 152
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Book Description
Information and technical data concerning scouring/erosion caused by water fl in rivers and streams. More specifically, how certain structures exaggerate this natural process by restricting water flow, causing constriction and loc scour. Material presented is from both field studies and laboratories
