Investigation of pressure variations over stepped spillways using smooth particle hydrodynamics

Husain, Sarhang M.; Muhammed, Jowhar Rasheed; Karunarathna, Harshinie; Reeve, Dominic E.

doi:10.1016/j.advwatres.2013.11.013

Cited by 32 publications

(48 citation statements)

References 37 publications

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“…It should be noted that the results of the this research are compatible with the theoretical-experimental model (TEM) proposed by Gomes (2006), as shown in Figure 5.…”

Section: Pressures Acting On the Vertical Faces Of The Stepssupporting

confidence: 78%

“…Comparing with previous studies by Amador (2005) and Gomes (2006) the behavior of the data is similar. However, the results of Amador (2005) for C p0.1%e follow under the upper data envelopment of the present study.…”

Section: Pressures Acting On the Vertical Faces Of The Stepssupporting

confidence: 68%

“…In Figure 6, it is possible to verify that the pressure fluctuation coefficient in the vertical face (C pσe ) had the same tendency as did the models proposed by Amador (2005) and Gomes (2006), however, with greater values of Cp σe . The segment near the starting point of aeration (-10 ≤ s' ≤ 10) is the region that presented the greatest pressure fluctuations.…”

Section: Pressures Acting On the Vertical Faces Of The Stepsmentioning

confidence: 63%

“…Since then, several experimental models of spillways have been carried out by researchers such as Tozzi (1992), Sanagiotto (2003), Dai Prá (2004, Relvas and Pinheiro (2011), Zhang et al (2012), Frizell et al (2013), Sun and Chanson (2013), Dhatrak and Tatewar (2014), Husain et al (2014), Conterato et al (2015), Xu et al (2015), Mirza et al (2015), Dai Prá et al (2016), Zhang and Chanson (2016) among others. Most of these studies focus on the energy dissipated by the steps and the residual energy in the bottom of the structure in order to give subsidies to the design of the dissipation structures.…”

Section: Introductionmentioning

confidence: 99%

“…The pressures on the steps were analyzed by some authors, such as Sanagiotto (2003), Dai Prá (2004, Amador (2005), Gomes (2006), Conterato (2011), Osmar (2016 and others. Figures 1 and 2 show the mean pressure distribution and the extreme pressure distribution, respectively, on the faces of the spillway stepped according to Sanagiotto (2003) and Osmar (2016).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the longitudinal distribution of pressures near the ends of the vertical and horizontal faces in stepped spillway of slope 1V: 0.75H

Osmar

Canellas

Priebe

et al. 2018

RBRH

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Stepped spillways have been widely used for flood runoff due to of their constructive advantages and in regards to energy dissipation during the drop, allowing downstream dissipation structures to be designed in smaller dimensions. Due to the need for further studies on the effect of runoff in the chute of the stepped spillway and the analysis of dimensionless numbers used to characterize the longitudinal distribution of the pressures acting on the faces of the steps of a spillway, this study aims to characterize the acting forces on the steps of said spillways. Analyses were performed on a physical model of spillway with a slope of 1V: 0.75H and steps with a height of 6 centimeters. The pressure fields on the steps were analyzed and compared with results found in literature. As a general finding concerning the pressure in the horizontal faces, it was ascertained that the traction and the compression loads have relatively similar magnitudes, the negative pressures being more intense. Regarding the maximum pressures at the horizontal faces of the steps, it should be emphasized that the maximum values of compression have occurred at the end of the chute and that the lower discharges yielded higher values of pressure coefficients.Keywords: Dams; Stepped spillways; Pressures on spillways. RESUMOVertedouros em degraus vem sendo muito utilizados para escoamento de cheias devido às suas vantagens construtivas e em relação à dissipação de energia durante a queda, possibilitando que as estruturas de dissipação a jusante possam ser projetadas em menores dimensões. Devido a necessidade de estudos mais aprofundados sobre a ação do escoamento na calha de vertedouros em degraus e a análise dos adimensionais utilizados para caracterizar a distribuição longitudinal das pressões atuantes nas faces dos degraus de um vertedouro, o presente estudo objetiva a caracterização dos esforços atuantes nos degraus dos referidos vertedouros. Foram realizadas análises sobre um modelo físicos de vertedouro com declividade de 1V:0,75H e degraus de 6 centímetros de altura. Os campos de pressões nos degraus foram analisados e comparados com os resultados disponíveis na bibliografia. Como constatação geral sobre as pressões nos espelhos verificou-se que os esforços de tração e compressão têm magnitudes relativamente semelhantes, sendo mais intensas as pressões negativas. Sobre as pressões máximas nos patamares, destaca-se que os valores máximos de compressão ocorreram no final da calha, percebendo-se que as menores vazões geraram maiores valores de coeficientes de pressões. Palavras-chave:Barragens; Vertedouros em degraus; Pressões sobre vertedouros.RBRH, Porto Alegre, v. 23, e4, 2018Analysis of the longitudinal distribution of pressures near the ends of the vertical and horizontal faces in stepped spillway of slope 1V: 0.75H

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“…It should be noted that the results of the this research are compatible with the theoretical-experimental model (TEM) proposed by Gomes (2006), as shown in Figure 5.…”

Section: Pressures Acting On the Vertical Faces Of The Stepssupporting

confidence: 78%