期刊
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
卷 51, 期 14, 页码 3327-3346出版社
WILEY
DOI: 10.1002/eqe.3725
关键词
asymmetric-plan buildings; class-level assessment; fragility functions; reduced-order models; seismic performance
资金
- Italian Department of Civil Protection
- Eugenides Foundation in Greece
- European Commission through the Horizon 2020 program 'HYPERION-Development of a decision support system for improved resilience sustainable reconstruction of historic areas to cope with climate change extreme events based on novel sensors and modelling [821054]
This paper presents a procedure for deriving low-complexity structural models to predict the global response of asymmetric-plan low-rise frame buildings for class-level assessment. The goal is to create an idealized 3D structure with few degrees-of-freedom that can match the inelastic response of a building, while reducing computational cost. The proposed method is applied on a sample of 15 reinforced-concrete frame school buildings, exploring the limitations of the order-reduction approach.
A procedure is presented for deriving low-complexity structural models to predict the global response of asymmetric-plan low-rise frame buildings for purposes of class-level assessment. As a compromise between employing a full-scale multi-degree-of-freedom structural model versus an equivalent single-degree-of-freedom one, the challenge is to create an idealized 3D structure with few degrees-of-freedom that can match the inelastic response of a building for which full knowledge of geometrical and mechanical properties is available. Such a 3D reduced-order model can offset the computational cost related to performing multiple nonlinear dynamic analyses within the framework of Performance-Based Earthquake Engineering. To this goal, rules and equations are proposed for achieving equivalence among the linear and nonlinear properties (e.g. mass, stiffness, strength) of the building analysed and the related 3D reduced-order model. The procedure is applied on a sample of 15 existing reinforced-concrete frame school buildings, from the province of Foggia in Southern Italy, for which the full numerical models are available. Both calibrated and uncalibrated reduced-order models are created, exploring the limitations of the proposed order-reduction in a real-life case study.
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