Investigation on Phase Lag of Bidirectional Model in Nonlinear Seismic Analysis
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Bibliografische Angaben
| Autor(en): |
Yanyan Liu
(Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji-shi, Kyoto)
Akira Igarashi (Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji-shi, Kyoto) |
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| Medium: | Tagungsbeitrag | ||||
| Sprache(n): | Englisch | ||||
| Tagung: | IABSE Symposium: Tomorrow’s Megastructures, Nantes, France, 19-21 September 2018 | ||||
| Veröffentlicht in: | IABSE Symposium Nantes 2018 | ||||
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| Seite(n): | S23-133 | ||||
| Anzahl der Seiten (im PDF): | 7 | ||||
| DOI: | 10.2749/nantes.2018.s23-133 | ||||
| Abstrakt: |
The phase lag angle between the displacement and nonlinear restoring force vectors found in steel bridge piers under circular displacement loadings is one of the quantitative measures of multi- component interaction of bidirectional nonlinear restoring force. In this study, influence of the phase lag angle on dynamic response of structures under bidirectional seismic excitation is investigated using a modified rigid-plastic bidirectional restoring force model. The results of nonlinear time history analyses of the bidirectional rigid-plastic model with a uniform resultant force-displacement relationship and varying phase lag angles under bidirectional accelerograms show that the bidirectional model with a higher phase lag angle induces a higher circumferential energy dissipation, resulting smaller radial displacements. |
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