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Advances in Concrete Construction
  Volume 6, Number 3, June 2018 , pages 269-283

Geometrical dimensions effects on the seismic response of concrete gravity dams
Baris Sevim

    This study presents the effects of geometrical dimensions of concrete gravity dams on the seismic response considering different base width/dam height (L/H) ratios. In the study, a concrete gravity dam with the height of 200 m is selected and finite element models of the dam are constituted including five different L/H ratios such as 0.25, 0.5, 0.75, 1.00, 1.25. All dams are modeled in ANSYS software considering damreservoir-foundation interaction. 1989 Loma Prieta earthquake records are applied to models in upstreamdownstream direction and linear time history analyses are performed. Dynamic equilibrium equations of motions obtained from the finite element models of the coupled systems are solved by using Newmark time integration algorithm. The seismic response of the models is evaluated from analyses presenting natural frequencies, mode shapes, displacements and principal stresses. The results show that the L/H ratios considerably affect the seismic response of gravity dams. Also, the model where L/H ratio is 1.00 has more desirable results and most appropriate representation of the seismic response of gravity dams.
Key Words
    base width-dam height ratio (L/H); finite element modeling; geometrical dimensions effect; gravity dams; seismic response
Baris Sevim: Yildiz Technical University, Department of Civil Engineering, Esenler, Istanbul, Turkeyl Istanbul Gelisim University, Department of Civil Engineering, Avcilar, Istanbul, Turkey

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