Manual utilizator Slope - GeoStru Software

NORMATIVE 44
than the value of a g
S for the site in question.
c) in the range of periods between 0,2T 1
and 2T 1
, where T 1
is the
fundamental period of the structure in the direction where the
accelerogram will be applied; no value of the mean 5% damping
elastic spectrum, calculated from all time histories, should be less than
90% of the corresponding value of the 5% damping elastic response
spectrum.
3.2.3.1.3 Recorded or simulated accelerograms
1. Recorded accelerograms, or accelerograms generated through a physical
simulation of source and travel path mechanisms, may be used, provided that
the samples used are adequately qualified with regard to the seismogenetic
features of the sources and to the soil conditions appropriate to the site, and
their values are scaled to the value of a a g
S for the zone under consideration.
2. For soil amplification analyses and for dynamic slope stability verifications see
EN 1998-5:2004, 2.2.
3. The suite of recorded or simulated accelerograms to be used should satisfy
3.2.3.1.2(4).
3.2.3.2 Spatial model of the seismic action
1. For structures with special characteristics such that the assumption of the
same excitation at all support points cannot reasonably be made, spatial
models of the seismic action shall be used (see 3.2.2.1(8)).
2.Such spatial models shall be consistent with the elastic response spectra used
for the basic definition of the seismic action in accordance with 3.2.2.2 and
3.2.2.3.
3.2.4 Combinations of the seismic action with other actions
1.The design value E d
of the effects of actions in the seismic design situation shall
be determined in accordance with EN 1990:2002, 6.4.3.4.
2.The inertial effects of the design seismic action shall be evaluated by taking
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