Modified Hertz-damp model for base-isolated structural pounding simulation under near-fault earthquakes
| Autor: | Da Hai Zhao, Hong Nan Li, Yong Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Seismic gap
numerical analysis lcsh:Mechanical engineering and machinery structural pounding 0211 other engineering and technologies Base (geometry) 020101 civil engineering 02 engineering and technology 0201 civil engineering Acceleration Hertz medicine lcsh:TJ1-1570 General Materials Science base-isolated structure 021110 strategic defence & security studies business.industry Mechanical Engineering Numerical analysis near-fault ground motions Stiffness Structural engineering Near fault Hertz-damp model Isolation layer medicine.symptom business Geology |
| Zdroj: | Journal of Vibroengineering, Vol 19, Iss 3, Pp 1962-1979 (2017) |
| ISSN: | 2538-8460 1392-8716 |
| Popis: | Pounding phenomenon between base-isolated structures under near-fault earthquakes has been widely investigated with various impact models around the world. Firstly, the existing impact analysis models are summarized and discussed in this paper. For the Hertz-damp impact model, the damping constant does not coincide with its physical fact. Then, the damping constant in the Hertz-damp impact analysis model was modified based on the Hertz theory. Next, the approximate formula of the damping constant is theoretically derived, and the effectiveness is verified by a simulation analysis. The numerical results show that the pounding can significantly increase the floor acceleration, especially at the isolation layer. In addition, the impact stiffness has a significant effect on the acceleration response, and the inter-story drifts are also sensitive to the variety of impact stiffness. The simulation results indicate that excessive flexibility at the base-isolated system may lead to a susceptible pounding with a limited seismic gap. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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