Page - 20 - in Book of Full Papers - Symposium Hydro Engineering

The presentation will summarized the main lessons learned by the author from theses workshops. First, the numerical modeling of concrete dams under earthquakes will discussed: from commonly used simplified finite-element model using Westergaard added masses and massless foundation to more complex numerical analyses using advanced soil-fluid-structure interaction with fluid element and viscous-spring foundation boundaries for example. Comparisons of finite-element analyses with simplified and advanced methods will be presented. Second, the qualification of the numerical methods with earthquakes records on dams will be discussed: devices to records and save dam’s response under earthquake are now easily available and such data can be used to evaluate and improve numerical tools. Finally, a software is currently under development by the author to go through the Japanese database of records on dams and foundation. Such tool might prove very useful to analyze the increasing number of dam’s response under earthquake and to evaluate dynamic properties such as eigenfrequencies and damping values during earthquake. 20