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Nonlinear dynamic analysis of multi-base seismically isolated structures with uplift potential Ⅰ:formulation

Earthquake Engineering and Engineering Vibration 2009年第3期8卷 421-431页

作者： Panos C.Tsopelas Panayiotis C.Roussis Michael C.Constantinou Department of Civil Engineering University of ThessalyVolosGreece Department of Civil and Environmental Engineering University of CyprusNicosiaCyprus Department of Civill Structural and Environmental EngineeringUniversity at BuffaloState University of New YorkBuffaloNYUSA

The complexity of modem seismically isolated structures requires the analysis of the structural, system and the isolation system in its entirety and the ability to capture potential discontinuous phenomena such as isolator uplift and their effects on the superstructures and the isolation hardware. In this paper, an analytical model is developed and a computational algorithm is formulated to analyze complex seismically isolated superstructures even when undergoing highly-nonlinear phenomena such as uplift. The computational model has the capability of modeling various types of isolation devices with strong nonlinearities, analyzing multiple superstructures （up to five separate superstructures） on multiple bases （up to five bases）, and capturing the effects of lateral loads on bearing axial forces, including bearing uplift. The model developed herein has been utilized to form the software platform 3D-BASIS-ME-MB, which provides the practicing engineering community with a versatile tool for analysis and design of complex structures with modem isolation systems.

关键词： friction-pendulum isolator, seismic isolation nonlinear dynamic analysis uplift multiple superstructures multiple bases

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