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Earthquakes and Structures Volume 13, Number 1, July 2017 , pages 1-8 DOI: https://doi.org/10.12989/eas.2017.13.1.001 |
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Controlling the lateral displacement of building with external lever by using of MR damper |
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Kambiz Takin, Behrokh Hosseini Hashemi and Masoud Nekooei
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| Abstract | ||
| This article is all about using the MR damper with an external lever system for mitigation torsional and transitional lateral displacements by using of PID control algorithm. The torsional modes are so destructive and can be varied during an earthquake therefore, using a semi-active control system mostly recommended for them. In this paper the corner lateral displacement of each floor obtains and then it equivalents in a solid member and it connects to an MR damper, which relies to a rigid structure to reduce the response. An MR damper is a semi-active control system, which can absorb a lot of energy by injecting current to it. This amount of current is very low and needs low power supply, but it increases the amount of damper force, rather than inactive systems like viscous dampers. This paper will show the appropriate algorithm for current injection into MR damper when the eccentricity of the load is changed by using of Bouc-Wen and Bingham´s methods and illustrates the coincidence of them. | ||
| Key Words | ||
| MR damper; semi-active control system; torsion; Bingham model; Bouc-Wen model | ||
| Address | ||
| Kambiz Takin: Department of Civil Engineering, Safadasht Branch, Islamic Azad University, Tehran, Iran Behrokh Hosseini Hashemi: Structural Engineering Research Center (SERC), International Institute of Earthquake Engineering & Seismology(IIEES), Tehran, Iran, Member of IEEA Masoud Nekooei: Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran | ||