Optimal integrated seismic design of structural and viscoelastic bracing‐damper systems

SUMMARY Passive structural control techniques are generally used as seismic rehabilitation and retrofit methodologies for existing structures. A poorly explored and exciting opportunity within structural seismic control research is represented by the possibility to design new structural forms and configurations, such as slender buildings, without compromising the structural performance through an integrated design approach. In this paper, with reference to viscous dampers, an integrated seismic design procedure of the elastic stiffness resources and viscoelastic properties of a dissipative bracing-damper system is proposed and developed to ensure a seismic design performance, within the displacement-based seismic design, explicitly taking into account the dynamic behaviour both of the structural and control systems. The optimal integrated seismic design is defined as the combination of the variables that minimizes a suitable index, representing an optimized objective function. Numerical examples of the proposed integrated cost-effectiveness seismic design approach both on an equivalent SDOF system and a proportionally damped MDOF integrated system are developed defining the design variables, which minimize the cost index. Validation of the effectiveness of the proposed integrated design procedure is carried out by evaluating the average displacement of the time-history responses to seven unscaled acceleration records selected according to EC8 provisions. Copyright © 2014 John Wiley & Sons, Ltd.

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

[2]  T. T. Soong,et al.  Future directions in structural control , 2009 .

[3]  Alfredo H-S. Ang,et al.  Cost optimal design of R/C buildings , 2001, Reliab. Eng. Syst. Saf..

[4]  Paolo Castaldo,et al.  An Energy-based Approach to the Seismic Control of One-Way Asymmetrical Structural Systems using Semi-Active Devices , 2012 .

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

[6]  Andrew S. Whittaker,et al.  Energy dissipation systems for seismic applications: Current practice and recent developments , 2008 .

[7]  Kuo-Chun Chang,et al.  A study of the modal strain energy method for viscoelastically damped structures , 2001 .

[8]  Hyun-Moo Koh,et al.  Integrated optimum design of viscoelastically damped structural systems , 2004 .

[9]  David De Leon,et al.  Determination of optimal target reliabilities for design and upgrading of structures , 1997 .

[10]  D. P. Taylor,et al.  Viscous damper development and future trends , 2001 .

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

[12]  Nagesh R. Iyer,et al.  A methodology of design for seismic performance enhancement of buildings using viscous fluid dampers , 2014 .

[13]  S. W. Park.  Analytical modeling of viscoelastic dampers for structural and vibration control , 2001 .

[14]  Michael C. Constantinou,et al.  Experimental study of seismic response of buildings with supplemental fluid dampers , 1993 .

[15]  Karolos M. Grigoriadis,et al.  Optimal mix of passive and active control in structures , 1992 .

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

[17]  Mete A. Sozen,et al.  SUBSTITUTE-STRUCTURE METHOD FOR SEISMIC DESIGN IN R/C , 1976 .

[18]  T. T. Soong,et al.  Integrated design of controlled linear structural systems , 2009 .

[19]  O. Díaz,et al.  Vulnerability Functions And The Influence OfSeismic Design Parameters On Initial CostsFor Buildings Provided With HystereticEnergy-dissipating Devices , 2007 .

[20]  Ramana V. Grandhi,et al.  Optimum design of space structures with active and passive damping , 1990, Engineering with Computers.

[21]  Vitelmo V. Bertero,et al.  Evaluation of Strength Reduction Factors for Earthquake-Resistant Design , 1994 .

[22]  Jinping Ou,et al.  Seismic response analysis of structures with velocity-dependent dampers , 2007 .

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

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

[25]  Bin Xu.  Integrated optimization of structure and control systems for interconnected building structures subjected to earthquake , 2014 .

[26]  Bin Xu,et al.  Integrated Design of Control/Structural Systems Based on Genetic Algorithm , 2012 .

[27]  Iunio Iervolino,et al.  REXEL: computer aided record selection for code-based seismic structural analysis , 2010 .

[28]  Jaime García-Pérez.  Seismic zoning for initial- and total-cost minimization , 2000 .

[29]  C. Cornell,et al.  Disaggregation of seismic hazard , 1999 .