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Transient pressures in hydrotechnical tunnels during earthquakes
Author(s) -
Kojic Slobodan B.,
Trifunac Mihailo D.
Publication year - 1988
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.4290160405
Subject(s) - transient (computer programming) , geotechnical engineering , geology , ground motion , hydrostatic equilibrium , engineering , structural engineering , mechanics , seismology , physics , computer science , operating system , quantum mechanics
Transient pressures generated by earthquake shaking in hydrotechnical tunnels are evaluated by the discrete Fourier transform technique. The effects of the horizontal ground motion accelerating the closed downstream tunnel gate, as well as the upstream dam face, and the influence of the vertical motion of the reservoir floor are considered in this analysis. An example of a typical bottom outlet is analysed by subjecting it to several computed accelerograms. It is shown that high hydrodynamic pressures can be developed, several times larger than the hydrostatic pressure.