Experimental study of controllable MR-TLCD applied to the mitigation of structure vibration

【MR-TLCD (Magneto-Rheological Tuned Liquid Column Damper) is a new developed vibration control device, which combines the traditional passive control property with active controllability advantage. Based on traditional TLCD governing equation, this study further considers MR-fluid viscosity in the equation and by transforming the non-linear damping term into an equivalent linear damping, a solution can be obtained. In order to find a countable set of parameters for the design of the MR-TLCD system and also to realize its applicability to structures, a series of experimental test were designed and carried out. The testing programs include the basic material properties of the MR-fluid, the damping ratio of a MR-TLCD and the dynamic responses for a frame structure equipped with the MR-TLCD system subjected to strong ground excitations. In both the analytical and experimental results of this study, it is found that the accurately tuned MR-TLCD system could effectively reduce the dynamic response of a structural system.】

[1]  Jeffrey T. Scruggs,et al.  Simulation-based robust design of mass dampers for response mitigation of tension leg platforms , 2009 .

[2]  Limin Sun,et al.  Tuned liquid damper (TLD) for suppressing horizontal motion of structures , 1992 .

[3]  B. Samali,et al.  Optimization of tuned liquid column dampers , 1997 .

[4]  Medhat A. Haroun,et al.  STOCHASTIC SEISMIC PERFORMANCE EVALUATION OF TUNED LIQUID COLUMN DAMPERS , 1996 .

[5]  B. Samali,et al.  Control of Along-Wind Response of Structures by Mass and Liquid Dampers , 1992 .

[6]  Billie F. Spencer,et al.  Stochastic optimal control of wind-excited tall buildings using semi-active MR-TLCDs , 2004 .

[7]  Y. Wen.  Equivalent Linearization for Hysteretic Systems Under Random Excitation , 1980 .

[8]  Hyung-Jo Jung,et al.  Feasibility study of an MR damper-based smart passive control system employing an electromagnetic induction device , 2007 .

[9]  Hsien Hua Lee,et al.  Response mitigation on the offshore floating platform system with tuned liquid column damper , 2006 .

[10]  Ahsan Kareem,et al.  Semi-active tuned liquid column dampers for vibration control of structures , 2001 .

[11]  Yozo Fujino,et al.  Vibration control by multiple tuned liquid dampers (MTLDs) , 1993 .

[12]  Chien Ming Wang,et al.  Effectiveness of tuned liquid column dampers for vibration control of towers , 1995 .

[13]  Hsien Hua Lee,et al.  Experimental study on the vibration mitigation of offshore tension leg platform system with UWTLCD , 2012 .

[14]  Billie F. Spencer,et al.  Magneto-rheological tuned liquid column dampers (MR-TLCDs) for vibration mitigation of tall buildings: modelling and analysis of open-loop control , 2005 .