Real-time hybrid testing of a smart base isolation system

2013 ◽  
Vol 43 (1) ◽  
pp. 139-158 ◽  
Author(s):  
Pei-Ching Chen ◽  
Keh-Chyuan Tsai ◽  
Pei-Yang Lin
Keyword(s):  
Real Time ◽  
Base Isolation ◽  
Hybrid Testing ◽  
Isolation System ◽  
Base Isolation System ◽  
Smart Base Isolation

Design of Shape Memory Alloy Damper for Base Isolated Structure

1997 ◽  
Author(s):  
Krzysztof Wilde ◽  
Paolo Gardoni ◽  
Yozo Fujino ◽  
Stefano Besseghini
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Base Isolation ◽  
Hysteretic Behavior ◽  
Isolation System ◽  
Rubber Bearing ◽  
Laminated Rubber Bearing ◽  
Base Isolation System ◽  
Rubber Bearings ◽  
Smart Base Isolation

Abstract Base isolation provides a very effective passive method of protecting the structure from the hazards of earthquakes. The proposed isolation system combines the laminated rubber bearing with the device made of shape memory alloy (SMA). The smart base isolation uses hysteretic behavior of SMA to increase the structural damping of the structure and utilizes the different responses of the SMA at different levels of strain to control the displacements of the base isolation system at various excitation levels. The performance of the smart base isolation is compared with the performance of isolation by laminated rubber bearings to assess the benefits of additional SMA damper for isolation of three story building.

Dynamic Performance Analysis of a Smart Base Isolation System Based on Magnetorheological Elastomers

2013 ◽  
Vol 397-400 ◽  
pp. 422-426
Author(s):  
Zhi Qiao ◽  
Jian Guo Ding
Keyword(s):  
Elastic Modulus ◽  
Smart Materials ◽  
Base Isolation ◽  
Dynamic Performance ◽  
Isolation System ◽  
Magnetorheological Elastomers ◽  
Dynamic Loadings ◽  
Base Isolation System ◽  
Dynamic Performance Analysis ◽  
Smart Base Isolation

In this paper, we studied a smart base isolation system based on magnetorheological elastomers (MRE), which is a new class of smart materials whose elastic modulus or stiffness can be adjusted by changing the magnitude of the applied magnetic field. The main goals of this study are to demonstrate the use of MREs as field-dependent element in a smart base isolation system and investigate the dynamic performance of the smart base isolation system in mitigating excessive vibrations of the building structure under dynamic loadings. To this end, we designed some MRE samples working in compressive mode and measured their properties under various magnetic fields in which the elastic modulus varied by up to 250%.Compared with the structure installing traditional base isolation system, the dynamic performance of the structure installing smart base isolation system is much better under the dynamic loadings.

Dynamic Analysis of a Smart Base-Isolation System Based on MR Elastomers

2010 ◽  
Author(s):  
Hyung-Jo Jung ◽  
Jeong-Su Park ◽  
Jeong-Hoi Koo
Keyword(s):  
Smart Materials ◽  
Base Isolation ◽  
Dynamic Performance ◽  
Building Structure ◽  
Seismic Excitations ◽  
Isolation System ◽  
Base Isolation System ◽  
Magneto Rheological ◽  
Shear Building ◽  
Smart Base Isolation

This paper presents a numerical investigation of a smart base isolation system employing magneto-rheological (MR) elastomers or an MR elastomer-based base isolation system. MR elastomers are a new class of smart materials whose elastic modulus or stiffness can be adjusted depending on the magnitude of the applied magnetic field. Hence, they can be used as controllable stiffness elements in engineering systems. The primary goal of this study is to investigate the dynamic performance of the smart base-isolation in mitigating excessive vibrations of a building structure under earthquake loadings. To this end, a five-story shear building model coupled with a smart base-isolation is developed. Using this model, a series of numerical simulations is performed to evaluate the effectiveness of the MR elastomer-based base isolation system under several historic seismic excitations. The results show that the proposed base isolation system outperform the conventional passive-type base isolation system in reducing the responses of the building structure for all seismic excitations considered in this study.

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