New techniques for modelling reservoir-dam and foundation-dam interaction

✍ Scribed by F. Guan; I.D. Moore

• Book ID: 104322691
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 767 KB
• Volume: 16
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/s0267-7261(96)00044-9

✦ Synopsis

A hybrid numerical procedure is proposed for the dynamic frequency domain response of earth dams resting on a multi-layered foundation. The impounded fluid is assumed viscous to account for the internal viscosity and absorption at the reservoir bottom. A new technique is described to determine the frequencydependent added masses and loads contributed by the reservoir at the inclined upstream dam face. The impedance of the multi-layered foundation is obtained using the layer transfer matrix and the dam is modelled by finite elements. An interface function is defined using interpolating functions to maintain equilibrium of interface forces and the displacement compatibility at the interface nodes. Unlike other boundary elements, this procedure avoids any additional discretization of the fluid and the foundation except at their interfaces with the dam structure. Numerical results. including transient reponses to the S9OW El-('entro earthquake groundmotion (1940), are presented to illustrate the modelling of reservoirdam and soil dam interaction. #' 1997 Elsevier Science Ltd.