نتایج جستجو برای: extent of scour hole

تعداد نتایج: 21175437  

Journal: :Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 2013

ژورنال: علوم آب و خاک 2003
حسین افضلی مهر, , محسن نادری بنی, , منوچهر حیدرپور, ,

The use of slot through a pier is a new method proposed to control local scour at bridge piers. In this study, control of local scour at bridge pier is studied using 20 pier models under clear water conditions. The models consist of one circular pier without slot, three round-nosed piers without slot, and 16 piers with slot. Two slot lengths were chosen (yl=b and yl=2b, where y1 is the length o...

Journal: :SN applied sciences 2021

Abstract The effect of various parameters flow, sediment and geometric features the bridge on depth shape scour hole occurred underneath a deck model without pier was investigated by series experiments conducted in flume under partially fully submerged flow clear water conditions. were performed with factors such as approach depth, discharge, size, degree submergence, girder location depth. A t...

, ,

In nature, a direct route to the river is uncommon. Most rivers have channels that bend wherea complex scour pattern dominates. We have intended to study the behavior patterns necessary to scour a river known as the dominant bends. Numerical models are powerful instruments for the prediction of such areas and can provide a good understanding of these areas. In the present study we have used a t...

2009
B. D. ADHIKARY

Simulation of scour-pit formations under the bridge decks and around the bridge piers, due to sediment suspension and transport caused by flooding and pressure flow conditions, is of significant interest nowadays to computational fluid dynamics (CFD) and hydraulic researchers. From CFD perspective, analysis of bridge under various flooding conditions and impact of the drag and lift forces on it...

Journal: :Earth Science Informatics 2015
Mohammad Najafzadeh Siow Yong Lim

An improved neuro-fuzzy based group method of data handling using the particle swarm optimization (NF-GMDH-PSO) is developed as an adaptive learning network to predict the localized scour downstream of a sluice gate with an apron. The input characteristic parameters affecting the scour depth are the sediment size and its gradation, apron length, sluice gate opening, and the flow conditions upst...

Journal: :Proceedings of ... Conference on Coastal Engineering 2023

Forensic engineering field surveys of recent tsunamis (Saatcioglu et al. 2005, Chock 2013) highlighted the importance scour-related damage to structures located in coastal communities. To date, only a limited number studies have investigated interaction extreme hydrodynamic flows and groups structures, none studied scour around multiple interacting with each other. One example discussed by Yeh ...

ژورنال: آبخیزداری ایران 2020

This paper presents, a set of experiments was conducted in a Plexiglas flume setup to investigate the simultaneous use of pipe and blade in the scour control around a submerged pipe. A vertical cylindrical pipe with and without a blade placed below it was selected for the experiments. The experiments were carried out in two different sates: with blade and without blade the pipe. Moreover, they ...

Journal: :Ocean Engineering 2022

This paper investigates the influence of scour erosion on mode shapes National Renewable Energy Laboratory (NREL) 5 MW offshore wind turbine (OWT) in varying soil conditions, where modes are derived from and wave-induced accelerations. A numerical model, which considers aerodynamic hydrodynamic loading with soil-structure interaction (SSI) servo-dynamics, is developed. The superstructure modell...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید