Equivalent linear computation of response spectra for liquefiable sites: The spectral interpolation method
| Autor: | Yannis Z. Tsiapas, George D. Bouckovalas |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Computation
Response analysis 0211 other engineering and technologies Soil Science Liquefaction 020101 civil engineering 02 engineering and technology Mechanics Geotechnical Engineering and Engineering Geology 0201 civil engineering Nonlinear system Pore water pressure Factor of safety Geology 021101 geological & geomatics engineering Civil and Structural Engineering Interpolation Parametric statistics |
| Zdroj: | Soil Dynamics and Earthquake Engineering. 116:541-551 |
| ISSN: | 0267-7261 |
| DOI: | 10.1016/j.soildyn.2018.10.033 |
| Popis: | A simplified methodology is presented for the computation of elastic response spectra at liquefiable sites, based on the widely used equivalent linear site response analysis method. The target response spectrum is obtained by frequency dependent interpolation between the response spectra for “non-liquefied” and for “liquefied” ground, the former computed for the native soil properties, without excess pore pressure buildup, and the latter for the properties of the liquefied soil. Apart from the structural frequency, the interpolation coefficient is also related to the factor of safety against liquefaction. In this way, the proposed methodology takes indirectly into account the initial segment of the seismic excitation time-history, until the onset of liquefaction, which is of cornerstone importance for the overall ground response at sites with low and moderate liquefaction potential. Results of parametric nonlinear numerical analyses and three field case studies are used to calibrate the methodology and evaluate its accuracy. In addition, the potential of the proposed methodology for defining code-oriented design spectra for liquefiable sites is examined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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