1,721,166 research outputs found
Numerical investigation of 3D seismic amplification by real steep topographic profiles and check of the EC8 topographic amplification coefficients
No full textNumerical evaluation of the effect of cross-coupling of different components of ground motion in site response analyses
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Simplified evaluation of earthquake induced permanent displacements of shallow foundations
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Earthquake-induced transient ground strains from dense seismic networks
No full textEarthquake-induced transient ground strain are evaluated based on the records obtained by two dense seismic networks, namely the Parkway Valley, New Zealand, and the UPSAR, California, arrays. The calculations are based on the spatial interpolation of the recorded displacements and a numerical differentiation to obtain the strain tensor at ground surface. The computed peak ground strains show an important dependence on azimuth, by a factor of about two. Furthermore, the relationship of the peak ground strains as a function of the most common measures of ground motion severity, such as peak ground acceleration, velocity and displacement, is explored. Our results are in reasonable agreement with other published relationships and with some of the few available direct records of strain. However, they point out the limitations of the simplified evaluations used in the engineering practice, which uniquely consider the wave passage effect on the ground strain evaluation, and tend to significantly underestimate the observation
Non-linear dynamic soil-structure interaction: application to seismic analysis of structures on shallow foundations
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