Comparison of distribution methods for viscous damping coefficients to buildings

A simple and convenient method often adopted by practising engineers designing supplemental viscous dampers to a building is to calculate damping coefficients of viscous dampers corresponding to a desired added damping ratio. To facilitate the design, various methods for distributing damping coefficients along the height of the building are compared in the study. In the article, two non-repetitive distribution methods are proposed and compared with some often adopted methods and a repetitive simplified sequential search algorithm. Numerical studies of three planar frames in which two are vertically irregular have indicated that all distribution methods may result in similar seismic responses if added damping ratio are the same. Nevertheless, compromising among a few design factors such as the total added damping coefficient, maximum damper force at one storey, total added damper force, control of storey drift and total computational efforts, one of the two proposed methods distributing the damping coefficient only to ‘efficient storeys’ may provide one of the better choices for the practical design of viscous dampers.

[1]  T. T. Soong,et al.  Seismic Design of Viscoelastic Dampers for Structural Applications , 1992 .

[2]  Izuru Takewaki,et al.  Optimal damper placement for minimum transfer functions , 1997 .

[3]  Stuart S. Chen,et al.  Design and Retrofit Methodology for Building Structures with Supplemental Energy Dissipating Systems , 1999 .

[4]  Michael C. Constantinou,et al.  Investigation of Seismic Response of Buildings with Linear and Nonlinear Fluid Viscous Dampers , 1997 .

[5]  Anil K. Chopra,et al.  SEISMIC RESPONSE OF VERTICALLY IRREGULAR FRAMES: RESPONSE HISTORY AND MODAL PUSHOVER ANALYSES , 2004 .

[6]  T. T. Soong,et al.  Passive and Active Structural Vibration Control in Civil Engineering , 1994, CISM International Centre for Mechanical Sciences.

[7]  Yin-Nan Huang,et al.  Design Formulations for Supplemental Viscous Dampers to Building Structures , 2008 .

[8]  Robert D. Hanson,et al.  Seismic design with supplemental energy dissipation devices , 2001 .

[9]  T. T. Soong,et al.  Passive Energy Dissipation Systems for Structural Design and Retrofit , 1998 .

[10]  Mario De Stefano,et al.  A review of research on seismic behaviour of irregular building structures since 2002 , 2008 .

[11]  Mahendra P. Singh,et al.  Optimal placement of dampers for passive response control , 2002 .

[12]  Izuru Takewaki,et al.  Building Control with Passive Dampers , 2009 .

[13]  Michael C. Constantinou,et al.  Experimental & Analytical Investigation of Seismic Response of Structures With Supplemental Fluid Viscous Dampers , 1992 .

[14]  Gary F. Dargush,et al.  Evolutionary aseismic design and retrofit of structures with passive energy dissipation , 2005 .

[15]  Jon D. Raggett.  Estimating Damping of Real Structures , 1975 .

[16]  David A. Kienholz,et al.  Finite element prediction of damping in structures with constrained viscoelastic layers , 1981 .

[17]  Hans W. Schuessler,et al.  A simple method for the design of velocity filters with choosable discrimination , 1986 .

[18]  T. T. Soong,et al.  Efficiency of a simple approach to damper allocation in MDOF structures , 2002 .

[19]  Sung-Kyung Lee,et al.  Allocation and slip load of friction dampers for a seismically excited building structure based on storey shear force distribution , 2008 .

[20]  N. Wongprasert,et al.  Application of a genetic algorithm for optimal damper distribution within the nonlinear seismic benchmark building , 2004 .

[21]  Shaleen Mathur,et al.  Seismic response control of RC setback building with friction dampers , 2003 .