✍ Scribed by René Tinawi; Lotfi Guizani
No coin nor oath required. For personal study only.
A new analytical development of the seismic hydrodynamic pressu concrete dams is presented. The finite control volume approach hydrodynamic pressure using the continuity principle and the linea The derived pressure expression is a function of the relative crack and velocity terms are then recast in the form of added mass and d nodes inside the discrete crack of a finite element model. This proc 55 m high and having an initial crack opening of 2 mm at the ba accelerograms, is analysed. For high-frequency ground motion, the the base of the dam, appears to be 50 per cent higher than the co INTRODUCTI Many concrete dams are subjected to various construction induce cracking. In particular temperature effects,' unde particularly when irregular geometries exist in plan. Crack horizontal lift joints or at the concrete/rock interface. The pr stiffness of existing concrete dams and represents initial def under seismic activities. In addition, any uplift pressure ins often been assumed to remain constant during ground shak
In reviewing uplift in conjunction with seismic loads, variou Commission,' the National Research Council3 and the Inter that the hydrostatic pressure head is instantly attained, upon the cracks during earthquakes. Contrary to these organizat that the uplift pressure is zero for earthquake-induced crack Building Research Establishment' provide no guidelines on Seismically induced hydrodynamic pressures inside crack source of uncertainty in the design and safety assessment of co Maximum Credible Earthquake (MCE), the seismically ind elsewheres-" ignoring any hydrodynamic interaction inside upstream face, with a measured length and aperture, is assu pressure inside the crack. During the earthquake, the movem corresponding increase in pressure have not been theoretica
The general theoretical formulation of the problem would with moving boundary conditions that are very difficult to d irregularities of the geometry of the crack as well as the intera structure itself. The absence of any theoretical developmen surprising.
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