Controllable outrigger damping system for high rise building with MR dampers

A novel energy dissipation system that can achieve the amplified damping ratio for a frame-core tube structures is explored, where vertical dampers are equipped between the outrigger and perimeter columns. The modal characteristics of the structural system with linear viscous dampers are theoretically analyzed from the simplified finite element model by parametric analysis. The result shows that modal damping ratios of the first several modes can increase a lot with this novel damping system. To improve the control performance of system, the semi-active control devices, magnetorheological (MR) dampers, are adopted to develop a controllable outrigger damping system. The clipped optimal control with the linear-quadratic Gaussian (LQG) acceleration feedback is adopted in this paper. The effectiveness of both passive and semi-active control outrigger damping systems is evaluated through the numerical simulation of a representative tall building subjected to two typical earthquake records.

[1]  Michael C. Constantinou,et al.  Scissor-Jack-Damper Energy Dissipation System , 2003 .

[2]  Stefano Berton,et al.  Amplification System for Supplemental Damping Devices in Seismic Applications , 2005 .

[3]  Billie F. Spencer,et al.  Modeling and Control of Magnetorheological Dampers for Seismic Response Reduction , 1996 .

[4]  Michael Willford,et al.  The damped outrigger concept for tall buildings , 2007 .

[5]  Billie F. Spencer,et al.  MR damping system for mitigating wind-rain induced vibration on Dongting Lake cable-stayed bridge , 2004 .

[6]  Shirley J. Dyke,et al.  Phenomenological Model of a Magnetorheological Damper , 1996 .

[7]  T. T. Soong,et al.  Supplemental energy dissipation: state-of-the-art and state-of-the- practice , 2002 .

[8]  B. Stafford Smith,et al.  Parameter Study of Outrigger-Braced Tall Building Structures , 1981 .

[9]  Bijan Samali,et al.  Benchmark Problem for Response Control of Wind-Excited Tall Buildings , 2004 .

[10]  Panos Tsopelas,et al.  TOGGLE-BRACE-DAMPER SEISMIC ENERGY DISSIPATION SYSTEMS , 2001 .

[11]  Lyan-Ywan Lu.  Seismic test of modal control with direct output feedback for building structures , 2001 .

[12]  Jeremiah C. O'Neill,et al.  Application of damping in high-rise buildings , 2006 .

[13]  Billie F. Spencer,et al.  Semiactive control strategy for a phase II smart base isolated benchmark building , 2008 .

[14]  Herman Ramon,et al.  Positioning and tuning of viscous damper on flexible structure , 2007 .