&lt;title&gt;Development of 400kN magnetorheological damper for a real base-isolated building&lt;/title&gt;

Fujitani, Hideo; Sodeyama, Hiroshi; Tomura, Takuya; Hiwatashi, Takeshi; Shiozaki, Yoichi; Hata, Kenji; Sunakoda, Katsuaki; Morishita, Shin; Soda, Satsuya

doi:10.1117/12.483810

Cited by 51 publications

(37 citation statements)

References 4 publications

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“…Similarly in 2003, 400 kN MR fluid dampers have been installed in a residential building in Japan (Fujitani et al 2003).…”

Section: Semi-active Base Isolationmentioning

confidence: 99%

Vibration Control System Design for Buildings

Nishimura¹

2013

Encyclopedia of Systems and Control

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This entry provides vibration control system design of buildings in terms of energy dissipation and seismic isolation including full active control devices and semi-active or passive devices. Vibration control of buildings subjected to dynamic loadings such as large earthquakes, strong winds, or heavy traffic is one of the most important factors to take into consideration to secure the users. Since energy dissipation is the key technology in vibration control, many kinds of devices have been developed for structural mitigation. Seismic retrofit of buildings is very important because long-period earthquakes occur at considerable distances from the seismic center. Here, we introduce the application of specific devices to the vibration control system design of real buildings, especially in Japan, where there are many earthquakes.

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“…Similarly in 2003, 400 kN MR fluid dampers have been installed in a residential building in Japan (Fujitani et al 2003).…”

Section: Semi-active Base Isolationmentioning

confidence: 99%

Vibration Control System Design for Buildings

Nishimura¹

2013

Encyclopedia of Systems and Control

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“…In 2001, the Nihon-Kagaku Miraikan, the Tokyo National Museum of Emerging Science and Innovation installed two 300 kN MR dampers manufactured by Sanwa Tekki Corporation using Lord Corporation MR fluid between the third and fifth floors respectively to provide seismic protection and it was the first implementation of MR dampers applied in civil engineering structure [6]. In 2003, a 400 kN MR damper was emerging in a residential building in Japan to provide the best seismic protection [7]. Ni [8].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study on seismic response control on top of Three-Gorges ship lift towers using magnetorheological intelligent isolation system and its key technique

2009

Front. Archit. Civ. Eng. China

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A vertical ship lift under earthquake excitation may suffer from a whipping effect due to the sudden change of building lateral stiffness at the top of the ship lift towers. This paper proposes a roof magnetorheological (MR) intelligent isolation system to prevent the seismic whipping effect on machinery structures. Theoretically, the dynamic models of MR damper and the mechanical model of ship lift was established, the inverse neural network controlling algorithm was proposed and the fundamental semi-active control equation for the Three-Gorges ship lift where the MR intelligent isolation system was installed was deduced. Experimentally, the experimental model of the ship lift was given, the vibrating table experiment of the MR intelligent isolation system controlling the whipping effect was carried out and the results of the inverse neural network control strategy and passive isolation strategy were compared. In practical aspect, the large-scale MR damper (500 kN) and a sliding support with limited stiffness were designed and fabricated. It was proven that the MR intelligent isolation system with proper control strategy can greatly reduce the seismic whipping effect on the top workshop of the ship lift and be simple and effective enough to be applied to real engineering structures.

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“…Dyke and Spencer [16] carried out a numerical simulation for a five-story building in which two MR dampers were employed, and Yi et al [21] performed an experimental verification of the use of four MR dampers for controlling a six-story test structure. MR damper systems are now widely accepted as practical in engineering realization due to the recent rapid progress in the technology related to the development of large-scale MR dampers, [15,[22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%