Publicado

2016-10-01

Uplift force and momenta on a slab subjected to hydraulic jump

Fuerza de levantamiento y momentos en una losa sometida a salto hidráulico

DOI:

https://doi.org/10.15446/dyna.v83n199.52252

Palabras clave:

Uplift pressure, hydrodynamics uplift, slabs, physical model, stilling basins, hydraulic jump. (en)
Presiones de levantamiento, levantamiento hidrodinámico, losas, modelo físico, tanques de amortiguación, salto hidráulico. (es)

Autores/as

  • Mauricio Gonzalez Betancourt Investigador del convenio COLCIENCIAS- Servicio Nacional de Aprendizaje SENA y miembro del Grupo de investigación del Posgrado en Aprovechamiento de Recursos Hidráulicos, Universidad Nacional de Colombia, Colombia. https://orcid.org/0000-0001-5485-8043
As part of the search for safe and economic design criterion to line slabs of stilling basins, the present study is one of the first to calculate the center of pressure, uplift forces, and momenta from a spatiotemporal analysis of the pressures measured above and below instrumented slabs in a physical model. Controlled release of the waterstops, and variation in the dimensions of expansion joints and in the gap between foundation and the lining slab were carried out in order to consider their effects on the magnitudes of uplift forces and momenta. An offset of the center of pressure from the slab’s center of gravity was identified. The objective of this work was to consider the failure mechanism induced by momentum in the slab’s design. Design criterion to make the lining slab’s thickness to length between 6 and 12 times the incident flow depth, is proposed, and this is compared to other design criteria.
Buscando un criterio de diseño seguro y económico para las losas de los tanques de amortiguación, se calcularon fuerzas de levantamiento, centros de presión y momentos a partir de un análisis espacio-temporal de las presiones medidas encima y debajo de losas instrumentadas en un modelo físico. La liberación controlada de los sellos y la variación en las dimensiones de las juntas y de la separación entre la cimentación y la losa, fueron realizadas para considerar sus efectos sobre la fuerza de levantamiento y los momentos. Se identificó desplazamiento del centro de presión respecto al centro de gravedad de la losa. Para considerar el mecanismo de falla inducido por el momento en el diseño de losas, objetivo del trabajo, se propone un criterio de diseño para el espesor equivalente de las losas con longitudes entre 6 y 12 veces la profundidad del flujo incidente y se compara con otros criterios.

Referencias

Federal Emergency Management Agency., Outlet works energy dissipators best practices for design, construction, problem identification and evaluation, inspection, maintenance, renovation, and repair. Technical manual, USA, FEMA P-679, pp. 1-66, 2010.

Hepler, T.E. and Johnson, P.L., Analysis of spillway failure by uplift pressure. ASCE National Conference, Colorado Springs, Colorado, august 8–12, pp 857-862, 1988.

VSL International. Soil and rock anchors, Examples from practice. Berne, Switzerland. [Online]. pp 19-20, 1992 [Consulted: 15th of august of 2009]. Available at: www.vsl.net/Portals/0/vsl_techreports/PT_Ground_Anchors.pdf

Bowers, C.E. and Tsai, F.Y., Fluctuating pressures in spillway stilling basins. J. Hydraulic Division, ASCE, 95(6), pp. 2071-2079, 1969.

Bribiescas, S. and Capella, V., Turbulence effects on the linning of stilling basins. Proceedings ICOLD. Congrés des Grands Barrages. Madrid. Q.41. R.83. pp. 1575-1592, 1973.

Bribiescas, S. and Fuentes, O., Tanques amortiguadores. Technical Report, Project 7045. UNAM, México D. F. pp. 1-50, 1978.

Hajdin, G., Contribution to the evaluation of fluctuation pressure on fluid currents limit areas- based on the pressures recorded at several points of the area. VIII Conference of Yugoslav Hydraulics Association, Portoroz. 1982.

Toso, J. and Bowers, C., Extreme pressures in hydraulic-jump stilling basins, J. of Hydraulic Engineering, 114(8), pp. 829-843, 1988. DOI: 10.1061/(ASCE)0733-9429(1988)114:8(829)

Farhoudi, J. and Narayanan, R., Force on slab beneath hydraulic jump. J. of Hydraulic Engineering, 117(1), pp. 64-82, 1991. DOI: 10.1061/(ASCE)0733-9429(1991)117:1(64)

Bellin, A. and Fiorotto, V., Direct dynamic force measurements on slab in spillway stilling basin. J. of Hydraulic Engineering. 121(10), pp. 686-693, 1995. DOI: 10.1061/(ASCE)0733-9429(1995)121:10(686)

Khatsuria R.M., Hydraulics of spillways and energy dissipators. New York: Marcel Dekker, 2005. pp 411-424.

Pinheiro, A., Quintela, A. and Ramos, C., Hydrodynamic forces in hydraulic jump stilling Basins. Proceedings of the symposium on fundamentals and advancements in hydraulic measurements and experimentation. ASCE. New York. USA. pp. 321-330, 1994.

Bollaert, E.F.R., Dynamic uplift of concrete linings: Theory and case studies, USSD Annual Meeting, April 24-26 2009, Nashville, United States. pp. 1-16, 2009.

Bollaert, E.F.R. and Schleiss, A.J., Transient water pressures in joints and formation of rock scour due to high-velocity jet impact. Communication 13, Laboratoire de Constructions Hydrauliques, Ecole Polytechnique Fédérale de Lausanne. 2002.

del Risco, E., Hurtado, E. y González, M., Estudio experimental de las presiones de levantamiento bajo una losa con juntas transversales al flujo. Tecnología y Ciencias del Agua. I(1), pp. 31-42, 2010.

Hurtado, E., del Risco, E. y González, M., Presiones medidas en la base de una losa de fondo con juntas paralelas al flujo en un canal. Revista de la Facultad de Ingeniería de la Universidad de Antioquia, 47, pp. 39-52, 2009.

Melo, J., Pinheiro, A. y Ramos, C., Forces on plunge pool slabs: Influence of joints location and width. J. of Hydraulic Engineering, 132(1), pp. 49-60. 2006. DOI: 10.1061/(ASCE)0733-9429(2006)132:1(49)

González, M., Levantamiento de una losa de piso sometida a un flujo turbulento. PhD Tesis, Facultad de Minas, Universidad Nacional de Colombia, Medellín, Colombia. 2013.

Frizell, W.K., Uplift and crack flow resulting from high velocity discharges over. Report DSO-07-07 U.S. Department of the interior, Bureau of Reclamation. Denver, Colorado, 2007, pp. 2-5.

del Risco, E., Investigación experimental de la falla de losas de revestimiento de tanques amortiguadores. MSc. Tesis, Facultad de Ingeniería. UNAM, México, 1983.

González, M. y Giraldo, S., Caracterización dinámica de sensores de presión utilizando el principio de la botella de mariotte. Rev. Fac. Ing. Univ. Antioquia, 71, pp. 146-156, 2014.

Proakis, J.G. and Manolakis D.G., Tratamiento Digital de Señales. Prentice Hall. España, 2000.

The International Society of Automation (ISA 37.16.01). A guide for the dynamic calibration of pressure transducers. pp. 13-38, 2002.

Vasiliev, O.F. and Bukreyev, V.I., Statistical characteristics of pressure fluctuations in the region of hydraulic jump. Proceedings 12th IAHR Congress, Fort Collins, USA, pp. 1-8, 1967.

Pinheiro, A., Accoes hidrodinámicas em bacias de dissipacao de energia por ressalto. PhD. dissertation, Universidad Técnica de Lisboa, Lisboa, Portugal, 353 P., 1995.

Khader, M. and Elango, K., Turbulent pressure field beneath a hydraulic jump. J. of Hydraulic Research, 12(4), pp. 469-489, 1974. DOI: 10.1080/00221687409499725

Fiorotto, V. and Rinaldo, A., Fluctuating uplift and linnings design in spillway stilling basins. J. Hydraulic Enginnering ASCE. 118(4), pp. 578-596. 1992a. DOI: 10.1061/(ASCE)0733-9429(1992)118:4(578)

Fiorotto, V. and Rinaldo, A., Turbulent pressure fluctuations under hydraulic jumps. J. of Hydraulic Research, 130, pp. 499-520, 1992b. DOI: 10.1080/00221689209498897

Lopardo, R., de Lio, J. and Lopardo, M., Physical modelling and design estimation of instantaneous pressures in stilling basins. Proceedings of the XXVIII IAHR Congress. Graz. 132 P., 1999.

Mees, A., Estudo dos esforços hidrodinâmicos em bacias de dissipação por ressalto hidráulico com baixo número de Froude. MSc. Thesis. Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil. 2008.

Fiorotto, V. and Salandin, P., Design of anchored slabs in spillway stilling basins. ASCE. J. of Hydraulic Engineering. 126(7), pp. 502-512. 2000. DOI: 10.1061/(ASCE)0733-9429(2000)126:7(502)

Blair, H.K. and Rhone, T.J., Design of small dams. Bureau of Reclamation, 3a ed., Washington, DC, cap. 9, Spillways structural design details. 1987, pp. 429-434.

Bureau of Indian Standards., Structural design of energy dissipators for spillways criteria. Doc. WRD 09(489). Preliminary Indian Standard. July 2007. Available at: www.bis.org.in/sf/wrd/WRD09(489).pdf

Bussell, M. and Cather, R., Design and construction of joints in concrete structures, report 146. Construction industry research and information association. London, UK, pp.12-64, 1995.

British Standard 8007., Code of practice for design of concrete structures for retaining aqueous liquids. UDC 624.953, pp. 11-19. 1987.

Chanson, H., The hydraulics of open channel flow. Edward Arnold, London, UK. 1999.

Murzyn, F., and Chanson, H., Free surface, bubbly flow and turbulence measurements in hydraulic jumps. Report CH63/07, Div. of Civil Engineering, University of Queensland, Brisbane, Australia, August, July. 2007. 116 P.

Chanson, H., Turbulent air-water flows in hydraulic structures: dynamic similarity and scale effects. Environ. Fluid. Mechanics 9(2), pp. 125-142, 2009. DOI: 10.1007/s10652-008-9078-3

Lopardo, R., Discussion: Prototype measurements of pressure fluctuations in The Dalles Dam stilling basin. Journal of Hydraulic Research, 48(6), pp. 822-823. 2010. DOI: 10.1080/00221686.2010.536432

Novak P., Nalluri C. and Narayanan R., Hydraulic Structures. Fourth Edition Taylor & Francis. New York pp: 246-265. 2007

JiJian, L. JiMin, W. and JinDe, G., Similarity law of fluctuating pressure spectrum beneath hydraulic jump. Chinese Science Bulletin. 53(14). pp. 2230-2238, 2008. DOI: 10.1007/s11434-008-0300-y

Lightthill, J., Waves in fluids. Cambridge University Press. pp. 89-202, 1979.

Lopardo, R., Algunos aportes de los modelos físicos en la optimización hidráulica de grandes presas Argentinas. V Congreso argentino de presas y aprovechamientos hidroeléctricos. San Miguel de Tucumán (Tucumán). pp. 1 -19, 2008.

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Cómo citar

[1]
“Fuerza de levantamiento y momentos en una losa sometida a salto hidráulico”, DYNA, vol. 83, no. 199, pp. 124–133, Oct. 2016, doi: 10.15446/dyna.v83n199.52252.