GGSD Program Details for EAGD-84

EAGD-84

Category	Dynamics (soil-structure interaction)
Publisher	NISEE - University of California, Berkeley
Platform	DOS, CDC mainframe, IBM mainframe
Status	Public domain
Description	EAGD-84 (Earthquake Analysis of Concrete Gravity Dams). Evaluates the response of concrete gravity dams to earthquakes, including the effects of dam-water-foundation 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, four-node 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 dam-foundation 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 frequency-dependent stiffness matrix is defined with respect to the degrees-of-freedom of the nodal points at the dam base. The dam-foundation 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 dam-foundation-rock system (if dam-foundation-rock 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