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Seismic design and retrofit of frame structures with hysteretic dampers: a simplified displacement-based procedure

  • Iolanda NuzzoEmail author
  • Daniele Losanno
  • Nicola Caterino
Original Research
  • 55 Downloads

Abstract

This paper describes an effective and easy to use displacement-based procedure for seismic design or retrofit of frame structures equipped with hysteretic dampers, taking into account the flexibility of the supporting brace that is usually provided to connect the device to the external frame. The proposed framework leads the designer to the definition of a complete set of dissipative braces mechanical properties able to provide a desired performance level. Some initial assumptions related to the equivalent damped brace system have to be set and checked throughout the procedure. The method is widely explained step by step, differentiating the case of linear elastic and nonlinear behavior of the bare frame. The capacity curve of the braced frame is built by means of simple analytical relations and approximated by a bilinear or trilinear curve depending on the bare frame behavior. Two case studies are provided to demonstrate the effectiveness of the suggested procedure for both cases of new construction and existing building, obtaining a satisfactory matching between analytical target and numerical capacity curves. The reliability of the design framework is finally assessed by means of static and dynamic nonlinear analyses.

Keywords

Displacement-based design Hysteretic dampers Braced frame Seismic retrofit 

Notes

Acknowledgements

The research activity has been supported by the University of Naples ‘‘Parthenope” with a grant within the call ‘‘Support for Individual Research for the 2015–17 Period” issued by Rectoral Decree no. 793/2017 and in the framework of the ReLUIS research project funded by the Italian Department for Civil Protection. The above supports are gratefully acknowledged.

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Construction Technologies InstituteNational Research Council of ItalySan Giuliano Milanese (MI)Italy
  2. 2.Department of Structures for Engineering and ArchitectureUniversity of Naples Federico IINaplesItaly
  3. 3.Department of EngineeringUniversity of Naples ParthenopeNaplesItaly

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