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Earthquake analysis of concrete gravity dams including reservoir bottom absorption and dam‐water‐foundation rock interaction
Author(s) -
Fenves Gregory,
Chopra Anil K.
Publication year - 1984
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290120507
Subject(s) - substructure , foundation (evidence) , geotechnical engineering , geology , computation , alluvium , gravity dam , engineering , structural engineering , finite element method , computer science , archaeology , algorithm , geomorphology , history
The available substructure method for the earthquake analysis of concrete gravity dams, including the dynamic effects of the impounded water and the flexible foundation rock, is extended to include the effects of alluvium and sediments invariably present at the bottom of actual reservoirs. Modelled approximately by a reservoir bottom that partially absorbs incident hydrodynamic pressure waves, these effects are incorporated into the continuum solution for the hydrodynamic pressure. The dam‐water‐foundation rock system is idealized as a two‐dimensional system and analysed under the assumption of linear behaviour. An example earthquake analysis is presented to demonstrate the results obtained from the analytical procedure. Computation times for several cases illustrate the efficiency of the analytical procedure. In particular, the additional computation time required to include reservoir bottom absorption is shown to be very small.