Investigation the accuracy of FEMA-440 procedure to analyze soil-structure systems
| Autor: | Mohammad Reza Davoodi, Leila Khanmohammadi, Javad Vaseghi Amiri |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Surface (mathematics)
Damping ratio inertial interaction Inertial frame of reference soil-structure interaction inelastic demand lcsh:Mechanical engineering and machinery 0211 other engineering and technologies 020101 civil engineering foundation damping 02 engineering and technology Kinematics nonlinear static procedures 0201 civil engineering Seismic analysis Physics::Geophysics kinematic interaction Soil structure interaction General Materials Science lcsh:TJ1-1570 Parametric statistics Mathematics 021110 strategic defence & security studies business.industry Mechanical Engineering Structural engineering Nonlinear system business |
| Zdroj: | Journal of Vibroengineering, Vol 19, Iss 6, Pp 4338-4355 (2017) |
| ISSN: | 2538-8460 1392-8716 |
| Popis: | A common analysis method of soil-structure systems in seismic design procedures such as FEMA-440 is to replace the entire soil-structure system by a fixed-base oscillator with an equivalent fundamental period and damping ratio to consider inertial effect of soil-structure interaction. It is generally believed by researchers that ignoring kinematic effect of soil-structure interaction is conservative to determine response of structures and FEMA-440 supports this idea by defining a reduction factor applying to elastic response spectra. Also, the improvements of nonlinear static procedures in FEMA-440 are achieved for fixed-base structures and the soil effects are not perfectly obtained in coefficients and relations of these procedures. Thus, it seems necessary to assess the accuracy of proposed procedures of FEMA-440 to include soil-structure interaction. In this paper, the accuracy of equivalent replacement oscillator and nonlinear static Procedures of Equivalent Linearization and Coefficient methods, defined in FEMA-440, to analyze soil-structure systems with surface and embedded foundations are evaluated. Both kinematic and inertial effects of soil-structure interaction are investigated by conducting a parametric study using 20 ground motions recorded on soft soil site E, on which the more SSI effects are probable. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|