This study deals with seismic reliability-based design (SRBD) relationships in terms of beha-vior factors and displacement demands for hardening structures equipped with double fric-tion pendulum system (DFPS) bearings. An equivalent 3dof system having a hardening post-yield slope is adopted to describe the superstructure behavior, whereas velocity-dependent laws are assumed to model the responses of the two surfaces of the DFPS. The yielding cha-racteristics of the superstructures are defined for increasing behavior factors in compliance with the seismic hazard of L’Aquila site (Italy) and with NTC18 assuming a lifetime of 50 years. Considering several natural seismic records and building properties under the hypo-thesis of modelling the friction coefficients of the two surfaces of the DFPS as random variables, incremental dynamic analyses are performed to evaluate the seismic fragility and the seismic reliability of these systems. Finally, seismic reliability is evaluated and seismic relia-bility-based design (SRBD) curves for the two surfaces of the double sliding devices are de-scribed.

Seismic reliability-based design of hardening structures equipped with double sliding devices / Castaldo, Paolo; Alfano, Gaetano; Gino, Diego; Anerdi, Costanza; Marano, GIUSEPPE CARLO. - ELETTRONICO. - 2:(2019), pp. 3286-3308. (Intervento presentato al convegno COMPDYN Congress 2019 - Computational Methods in Structural Dynamics and Earthquake Engineering tenutosi a Crete Island, Greece nel 24 - 26 June 2019).

Seismic reliability-based design of hardening structures equipped with double sliding devices

Paolo Castaldo;Gaetano Alfano;Diego Gino;Costanza Anerdi;Giuseppe Carlo Marano
2019

Abstract

This study deals with seismic reliability-based design (SRBD) relationships in terms of beha-vior factors and displacement demands for hardening structures equipped with double fric-tion pendulum system (DFPS) bearings. An equivalent 3dof system having a hardening post-yield slope is adopted to describe the superstructure behavior, whereas velocity-dependent laws are assumed to model the responses of the two surfaces of the DFPS. The yielding cha-racteristics of the superstructures are defined for increasing behavior factors in compliance with the seismic hazard of L’Aquila site (Italy) and with NTC18 assuming a lifetime of 50 years. Considering several natural seismic records and building properties under the hypo-thesis of modelling the friction coefficients of the two surfaces of the DFPS as random variables, incremental dynamic analyses are performed to evaluate the seismic fragility and the seismic reliability of these systems. Finally, seismic reliability is evaluated and seismic relia-bility-based design (SRBD) curves for the two surfaces of the double sliding devices are de-scribed.
2019
978-618-82844-7-0
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2776613