Stochastic optimization of shape-memory-alloy rubber bearing (SMARB) for isolating buildings against random earthquake
作者： Sourav Gur , Sudib K. Mishra , Subrata Chakraborty
DOI: 10.1002/STC.1635
关键词: Linearization 、 Engineering 、 Random vibration 、 Stochastic optimization 、 Structural engineering 、 Bearing (mechanical) 、 Base isolation 、 Nonlinear system 、 Optimization problem 、 SMA*
摘要: SUMMARY Shape-memory-alloy (SMA) aided isolation bearing has been proposed recently in order to achieve improved performances several aspects, comparing the traditional bearings for isolation. The behavior of such system experimentally demonstrated and numerically simulated under recorded seismic ground motions. present work deals with study optimum performance SMA-based random earthquake. stochastic response evaluation isolated building is performed by nonlinear vibration analysis via linearization load-deformation hysteresis SMA. responses indicates existence optimal value transformation strength SMA minimize superstructure acceleration thereby most efficient Thus, a structural optimization problem taken up obtain strength. A closed form expression parameters are also presented, which may be used establishing an initial design. viability justified analyzing set real earthquake motion records. found consistent obtained Copyright © 2014 John Wiley & Sons, Ltd.
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