Abstract
Hostile dynamic loadings such as severe wind storms, earthquakes, and sudden impacts can cause severe damage to many civil engineering structures. An intelligent structural system equipped with smart structural members that are controllable in real-time is an effective solution to structural damage and failure during such situations. Civil intelligent structures with controllable properties to adapt to any changes due to dynamic loadings can lead to effective protection of structures and their occupants. In this paper, design and testing of a semi-active magnetorheological (MR) pin joint, in which the moment resistance can be controlled in real-time by altering the magnetic field, is reported with the view of using it as a potential candidate for smart members in the development of intelligent structures. Design of prototype smart pin joints includes theoretical analysis related to the radius of the rotary plate, the property of MR fluids and the gap between the rotary plate and the casing based on the requirements of the dynamics of MR pin joints. FEM analysis was deployed to study the distribution of the magnetic field along the gap. It is found, from the theoretical analysis and experimental verification, that the MR pin joint with a diameter of 180 mm can produce a torque of up to 30 Nm, which meets requirements for semi-active members in a multi-storey prototype building model in the next stage of research and development.
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Jolly M R, Bender J W, Carlson J D. Properties and applications of commercial magnetorheological fluids. In: Proceedings of the SPIE 5th International Symposium on Smart Structures and Materials, San Diego, CA, USA, 1998, 262–275
Carlson J D, Catanzarite D M, Clair K A S. Commercial magnetorheological fluid devices. International Journal of Modern Physics B, 1996, 10(23/24): 2857–2865
Felt D W, Hagenbuchle M, Liu J, Richard J. Rheology of a magnetorheological fluid. Journal of Intelligent Material Systems and Structures, 1996, 7(5): 589–593
Dogruer U, Gordaninejad F, Evrensel C A. A new magnetorheological fluid damper for high-mobility multi-purpose wheeled vehicle (HMMWV). Journal of Intelligent Material Systems and Structures, 2008, 19(6): 641–650
Zhao Y, Choi Y T, Wereley N M. Semi-active damping of ground resonance in helicopters using magnetorheological dampers. Journal of the American Helicopter Society, 2004, 49(4): 468–482
Yang G Q, Spencer B F, Jung H J, Carlson J D. Dynamic modeling of large-scale magnetorheological dampersystems for civil engineering applications. Journal of Engineering Mechanics, 2004, 130(9): 1107–1114
Lou W J, Ni Y Q, Ko J M. Modal damping and stepping-switch control of stay cables with magnetorheological fluid dampers. Proc of SPIE, Reno, Nevada, 2001, 4330: 354–365
Fujino Y, Soong T T, Spencer B F. Structural control: basic concepts and applications. Proc ASCE Structures Congress XIV, Chicago, Illinois, 1996, 1277–1278
Widjaja J, Samali B, Li J. The use of displacement threshold for switching frequency strategy for structural vibration mitigation. Journal of Mechanical Science and Technology, 2007, 21: 865–869
Carlson J D. MR fluids and devices in the real world. International Journal of Modern Physics B, 2005, 19(7, 8 & 9): 1463–1470
Carlson J D, Leroy D F, Holzheimer J C. US Patent, 9708853, 1998
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Li, Y., Li, J., Samali, B. et al. Design considerations and experimental studies on semi-active smart pin joint. Front. Mech. Eng. China 4, 363–370 (2009). https://doi.org/10.1007/s11465-009-0074-1
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DOI: https://doi.org/10.1007/s11465-009-0074-1