Abstract
The supports and seismic actions for structural design are usually mathematical derivatives of the data collected from soil profiles with free-field conditions. This study is based on the premise that the pressure exerted by the structure onto the soil can change resonant properties of soil and thus redirect structural design. The research was conducted on a set of 10 real soil profiles, and involves 21 case studies and the use of two methods for correction of shear wave velocity profiles in order to include contact pressure. Analytically obtained results are compared with the corresponding results obtained by means of a centrifuge experiment
Highlights
The design of structures for earthquake resistance is practically based on both soil properties and signals passed through the soil
Regarding the seismic action, coded methods for seismic design of structures usually employed by engineering practice use response spectrum plots [3,4,5,6,7,8]
This study was conducted: on a set of 10 different real soil profiles collected by the authors; 21 different case studies of structures with different natural period of oscillation; using structures producing two different magnitudes of pressure on the soil and by using two different methods for correction of shear wave velocity profiles in order to include the pressure induced by the gravity structural loading
Summary
The design of structures for earthquake resistance is practically based on both soil properties and signals passed through the soil. When set side by side, both the springs and response spectra are practically functions of shear-related properties of the soil They are functions of the average value of shear wave velocity in the upper 30 m of the soil profile [2, 9, 10]. Codes for seismic design usually classify the soil via the average shear wave velocity in the upper 30 m of the profile [2, 3, 11,12,13] Such profiles practically have free-field conditions [14,15,16,17,18].
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