Dynamic Interaction Analysis between the Spillway and Foundation of Shirvan-Barzu Dam Using BEM

Topography magnification effects and the surroundings of structures had has an important role in their destruction after earthquakes. In this article, dynamic interaction of morning glory spillway of Barzu dam placed in Shirvan has been investigated in the frequency domain. Due to the position of structure, the earthquake occurrence is possible in the time when no water exists around the structure. Therefore, it is an important issue to consider the dynamic interaction between the spillway and its foundation. The solving method is based on boundary element method. First the formulation of boundary element method in the frequency domain is presented and then three examples are considered for verification of the results. The first example is a cantilever beam which is presented for verification of 3D elastodynamic finite medium problems. The second example is one layered valley which is presented for verification of one layered infinite medium. The third example is alluvial valley which is presented for verification of wave propagation in multi-layered infinite domains. After the verification, the foundation domain which is placed around some part of the structure has been modeled and analyzed separately, and then a model which has 2 sub domains has been presented. In order to have a realistic analysis, the problems have been modeled and analyzed three-dimensionally. In this study, the effect of some parameters such as shape irregularities, mechanical properties of materials (density, Poisson coefficient, shear modulus), stimulation frequency, incident wave type (P, SH, SV), azimuth and angle of incident wave on dynamic analysis result of the mentioned structure is investigated. The results of dynamic interaction analyses