Direct Dynamic Force Measurement on Slabs in Spillway Stilling Basins
Publication: Journal of Hydraulic Engineering
Volume 121, Issue 10
Abstract
This paper presents a new experimental procedure aimed at defining the global instantaneous uplift force, acting on slabs at the bottom of stilling basins. The global uplift force on slabs of different dimensions is measured for Froude numbers of the incident flow ranging from 5 to 12. The measurements were made in the zone of hydraulic jump, where high turbulence yields the maximum uplift force. The fluctuating force per unit area is shown to depend on the slab shape and on the statistical structure of the instantaneous spatial distribution of turbulent pressures at the bottom of the hydraulic jump. This paper provides direct experimental evaluation of a criterion for the design of the protection slabs in spillway stilling basins. It is shown that rectangular slabs with the longer side placed along the flow direction (where the transverse direction is maintained to a technically minimum length) are most suitable for the design of the lining of spillway stilling basins.
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References
1.
Abdul Khader, M. H., and Elango, K.(1974). “Turbulent pressure field beneath a hydraulic jump.”J. Hydr. Res., 12(4), 469–489.
2.
Bowers, C. E., and Toso, J.(1988). “Karnafuli project, model studies of spillway damage.”J. Hydr. Engrg., ASCE, 114(5), 469–483.
3.
Bowers, C. E., and Toso, J. (1990). “Closure to `Karnafuli project, model studies of spillway damage.”' J. Hydr. Engrg., ASCE, 116(6), 854.
4.
Bowers, C. E., and Tsai, F. Y.(1969). “Fluctuating pressures in spillway stilling basins.”J. Hydr. Div., ASCE, 95(6), 2071–2079.
5.
Di Santo, A., Petrillo, A., and Piccinnini, A. F. (1990). “Studio delle sollecitazioni idrodinamiche sulle piastre costituenti il fondo dei bacini di dissipazione a risalto.”Atti XXIII Convegno di Idraulica e Costruzioni Idrauliche, Firenze, Italy, Vol. 4, E127–E138 (in Italian).
6.
Farhoudi, J., and Narayanan, R.(1991). “Force on slab beneath hydraulic jump.”J. Hydr. Engrg., ASCE, 117(1), 64–81.
7.
Feller, W. (1968). An introduction to probability theory and its applications . John Wiley and Sons, New York, N.Y.
8.
Fiorotto, V. (1990). “Un approccio bidimensionale allo studio della stabilita' delle protezioni di fondo in bacini di dissipazione.”Atti XXII Convegno di Idraulica e Costruzioni Idrauliche, Vol. 1, 283–294, Cosenza, Italy (in Italian).
9.
Fiorotto, V., and Rinaldo, A. (1988). “Sul dimensionamento delle protezioni di fondo in bacini di dissipazione: nuovi risultati teorici e sperimentali.”Giornale del Genio Civile, Rome, Italy, (7-8-9), 179–201 (in Italian).
10.
Fiorotto, V., and Rinaldo, A.(1992a). “Fluctuating uplift and linings design in spillway stilling basins.”J. Hydr. Engr., ASCE, 118(4), 578–596.
11.
Fiorotto, V., and Rinaldo, A.(1992b). “Turbulent pressure fluctuations under hydraulic jumps.”J. Hydr. Res., 30(4), 499–520.
12.
Leutheusser, H. J., and Kartha, V. C.(1972). “Effect of inflow condition on the hydraulic jump.”J. Hydr. Div., ASCE, 98(8), 1367–1386.
13.
Rinaldo, A. (1985). “Un criterio per il dimensionamento delle protezioni di fondo in bacini di smorzamento.”Giornale del Genio Civile, Rome, Italy, (4-5-6), 165–186 (in Italian).
14.
Rinaldo, A. (1986). “The structural design of the lining of spillway stilling basins.”Excerpta, 1, 81–89, Padova, Italy.
15.
Sanchez Bribiesca, J. S., and Viscaino, A. C. (1973). “Turbulent effects on the lining of stilling basin.”ICOLD 11th Congr. Madrid, Spain, Q. 41, Vol. 2.
16.
Toso, J., and Bowers, E. C.(1988). “Extreme pressure in hydraulic jump stilling basin.”J. Hydr. Engrg., ASCE, 114(8), 829–843.
17.
Vasiliev, O. F., and Bukreyev, V. I. (1967). “Statistical characteristics of pressures fluctuations in the region of hydraulic jump.”Proc., 12th Congr. Int. Assoc. of Hydr. Res., Fort Collins, Colo., Vol. 2, 1–8.
18.
Wilson, E. H., and Turner, A. A.(1972). “Boundary layer effects on hydraulic jump location.”J. Hydr. Div., ASCE, 98(7), 1127–1142.
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Copyright © 1995 American Society of Civil Engineers.
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Published online: Oct 1, 1995
Published in print: Oct 1995
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