Graphic dynamic prediction of polarized earthquake incidence response for plan-irregular single story buildings
| Autor: | Rosario Gigliotti, G. Mezzacapo, Enrico Spacone, Marco Faggella |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
021110 strategic
defence & security studies Total internal reflection Hydrogeology business.industry Modal analysis 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Kinematics Structural engineering Geotechnical Engineering and Engineering Geology Polarization (waves) 0201 civil engineering Vibration Nonlinear system Geophysics Modal business Geology Directional earthquake incidence Incremental dynamic analysis Irregular buildings Plan asymmetry Response spectrum analysis Torsional behavior Civil and Structural Engineering |
| Popis: | A graphical dynamic model is presented to predict the directional earthquake response of two-ways plan-asymmetric buildings. The theoretical principles inherent to torsional dynamics and vibrations are investigated and the dynamic directional response is rationally explained based on modal rotational kinematics about modal torsional pivots. Seismic forces and response decomposition are handled through geometric modal torsional trends and the earthquake incidence response envelopes are described through directional modal participation radii and graphic spectrum-based ‘8-shaped’ directional influence circles. The graphic approach provides good predictions of the maximum response and of the critical angle computed through directional combination methods. A nonlinear 3D frame model with eccentric infills is analyzed through linear and nonlinear response history analyses (RHA, NLRHA) changing the earthquake incidence angle. Upon confirmation of weak modal coupling, graphic-dynamic modal torsional trends and directional inelastic response envelopes are used to predict the nonlinear response. Directional incremental dynamic analyses and uncoupled modal response history analyses confirm the prediction of polarization. |
| Databáze: | OpenAIRE |
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