EAGD84

Category  Dynamics (soilstructure interaction) 
Publisher  NISEE  University of California, Berkeley 
Platform  DOS, CDC mainframe, IBM mainframe 
Status  Public domain 
Description  EAGD84 (Earthquake Analysis of Concrete Gravity Dams). Evaluates the response of concrete gravity dams to earthquakes, including the effects of damwaterfoundation rock interaction and of materials, such as alluvium and sediments, at the bottom of reservoirs. The dam monolith is idealised as an assemblage of planar, fournode nonconforming finite elements. Energy dissipation in the dam concrete is represented by constant hysteretic damping. The water impounded in the reservoir is idealised as a fluid domain of constant depth and infinite length in the upstream direction. The absorptiveness of the reservoir bottom materials is characterised by a wave reflection coefficient. If the effects of damfoundation rock interaction are to be included, the dynamic stiffness matrix for the region of the foundation rock appears in the equations of motion for the dam. This frequencydependent stiffness matrix is defined with respect to the degreesoffreedom of the nodal points at the dam base. The damfoundation rock system may be assumed to be either in a state of generalised plane stress or plane strain. Outputs from the program include hydrostatic loads; nodal point displacements and element stresses due to static loads; natural vibration frequencies and mode shapes of the dam (if the foundation rock is assumed to be rigid) or of an associated damfoundationrock system (if damfoundationrock interaction effects are included); the largest major principal stress and the smallest minor principal stress in each finite element and the times at which they occur. 
Cost  Free on WWW 
Data formats supported  None stated 
Supplier in United States of America  NISEE  University of California, Berkeley 
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