Stochastic seismic analysis and comparison of alternative external dissipative systems

Laura Gioiella, Enrico Tubaldi, Fabrizio Gara, Luigino Dezi, Andrea Dall'Asta

Research output: Contribution to journalArticle

Abstract

This paper deals with the seismic retrofit of existing frames by means of external passive dissipative systems. Available in different configurations, these systems allow high flexibility in controlling the structural behaviour and are characterized by some feasibility advantages with respect to dissipative devices installed within existing frames. In particular, this study analyzes and compares the performances of two external solutions using linear viscous dampers. The first is based on the coupling of the building with an external fixed-based steel braced frame by means of dampers placed horizontally at the floor levels. The second is an innovative one, based on coupling the building with a “dissipative tower,” which is a steel braced frame hinged at the foundation level, and activating the dampers through its rocking motion.The effectiveness of the two solutions is evaluated and compared by considering a benchmark existing reinforced concrete building,employing a stochastic dynamic approach, under the assumption of linear elastic behaviour for the seismic performance evaluation. This allows efficiently estimating the statistics of many response parameters of interest for the performance assessment and thus carrying out extensive parametric analyses for different properties of the external systems. The study results provide useful information regarding the design and the relative efficiency of the proposed retrofit solutions.
LanguageEnglish
Article number5403737
Number of pages16
JournalShock and Vibration
Volume2018
DOIs
StatePublished - 29 Jan 2018

Fingerprint

dampers
steel
seismic retrofit
performance assessment
reinforced concrete
Concrete buildings
Steel
steels
Towers
Reinforced concrete
towers
Statistics
flexibility
estimating
statistics
comparison
analysis
evaluation
configurations
parameter

Keywords

  • structural behaviour
  • dissipative devices
  • g linear viscous dampers
  • seismic retrofit

Cite this

Gioiella, Laura ; Tubaldi, Enrico ; Gara, Fabrizio ; Dezi, Luigino ; Dall'Asta, Andrea. / Stochastic seismic analysis and comparison of alternative external dissipative systems. In: Shock and Vibration. 2018 ; Vol. 2018.
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Stochastic seismic analysis and comparison of alternative external dissipative systems. / Gioiella, Laura; Tubaldi, Enrico; Gara, Fabrizio; Dezi, Luigino; Dall'Asta, Andrea.

In: Shock and Vibration, Vol. 2018, 5403737, 29.01.2018.

Research output: Contribution to journalArticle

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Gioiella L, Tubaldi E, Gara F, Dezi L, Dall'Asta A. Stochastic seismic analysis and comparison of alternative external dissipative systems. Shock and Vibration. 2018 Jan 29;2018. 5403737. Available from, DOI: 10.1155/2018/5403737