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An applied method for analysis of nonlinear seismic response of layered soil deposit
The available methods of Seismic ground response analysis including equivalent linear and nonlinear methods perform the analysis in the time or frequency domain. Nonlinear methods usually provide accurate results however, these methods are usually time-consuming because of their step by step integration procedure in time domain. On the other hand, simplicity, flexibility and less computational effort are the advantages of the frequency domain methods. Therefore, in this paper seismic response of layered soil deposits is performed by hybrid frequency-time domain procedure. The soil deposit is modeled as a discrete system composed of a finite number of lumped masses connected by springs and dashpots. A seismic motion is applied to the system at the base level. Pseudo-forces are applied to the system in a rational iterative procedure in the time domain to evaluate the nonlinear soil behavior. This paper presents an applied method of the nonlinear seismic ground response analysis without the need for more input data than general data provided in the most of the geotechnical investigations. Verification of the accuracy of the proposed method is made by comparing its results including acceleration and displacement time histories and acceleration response spectrum to the recorded data of different earthquakes. Further investigation is conducted by comparing the results of the proposed method with the results of equivalent linear (i.e. SHAKE computer program) and nonlinear (i.e. DEEPSOIL computer program) methods.
An applied method for analysis of nonlinear seismic response of layered soil deposit
The available methods of Seismic ground response analysis including equivalent linear and nonlinear methods perform the analysis in the time or frequency domain. Nonlinear methods usually provide accurate results however, these methods are usually time-consuming because of their step by step integration procedure in time domain. On the other hand, simplicity, flexibility and less computational effort are the advantages of the frequency domain methods. Therefore, in this paper seismic response of layered soil deposits is performed by hybrid frequency-time domain procedure. The soil deposit is modeled as a discrete system composed of a finite number of lumped masses connected by springs and dashpots. A seismic motion is applied to the system at the base level. Pseudo-forces are applied to the system in a rational iterative procedure in the time domain to evaluate the nonlinear soil behavior. This paper presents an applied method of the nonlinear seismic ground response analysis without the need for more input data than general data provided in the most of the geotechnical investigations. Verification of the accuracy of the proposed method is made by comparing its results including acceleration and displacement time histories and acceleration response spectrum to the recorded data of different earthquakes. Further investigation is conducted by comparing the results of the proposed method with the results of equivalent linear (i.e. SHAKE computer program) and nonlinear (i.e. DEEPSOIL computer program) methods.
An applied method for analysis of nonlinear seismic response of layered soil deposit
Nimtaj, Amir (Autor:in) / Bagheripour, Mohammad Hossein (Autor:in)
25.09.2013
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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