An Equivalent Non-Uniform Beam-Like Model for Dynamic Analysis of Multi-Storey Irregular Buildings

Greco, Annalisa; Fiore, Ilaria; Occhipinti, Giuseppe; Caddemi, S.; Spina, Daniele; Caliò, Ivo

doi:10.3390/app10093212

Cited by 17 publications

(9 citation statements)

References 28 publications

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“…In the same figure, the simulations performed with the previously updated FEM2016 linear model are also depicted. As expected [12][13][14][15][16][17][18][19][20][21]34], the FEM2016 model is able to reproduce the real behaviour until the elastic limit is exceeded. After that, a significant period of elongation of the structure is evident in the experimental results.…”

Section: The Structural Responsesupporting

confidence: 75%

Analysis of the Recorded Response of a School Building Heavily Damaged by the 2016 Central Italy Earthquake

et al. 2022

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The OSS (acronym of the Italian “Osservatorio Sismico delle Strutture”) is a network of permanent seismic monitoring systems installed on about 150 buildings in Italy. Each system consists of a number of sensors sufficient to completely describe the dynamic response of the structure. Structural typologies have been selected according to their representativeness of the public building stock and to their importance for emergency management. Data available for each building include: structural survey and in situ tests on materials, experimental modal analysis, finite element models and model updating. In the above framework, a school building located in Amatrice, a small town in the meizoseismal area heavily impacted by the 2016 Central Italy earthquake, is one of the buildings instrumented by the OSS; thus, its monitored dynamic response, including that under the main shock, is available. The building showed diffused huge damage with partial collapses. Firstly, a linear finite element model is used in the interpretation of small amplitude vibrations in order to give a reliable dynamic characterization of the initial conditions of the structure. Some relevant quantities of the recorded structural motion under seismic excitation are used to describe the experimental dynamic behaviour. The recorded displacements are then applied to a nonlinear finite element model, and the numerical results are compared with the experimental evidence. The main aim is to discuss the capability of the combined use of experimental response and computational tools in quantifying damage suffered by a structure on the basis of the measured response to an earthquake.

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Section: The Structural Responsesupporting

confidence: 75%

Analysis of the Recorded Response of a School Building Heavily Damaged by the 2016 Central Italy Earthquake

et al. 2022

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“…Aiming to calculate model-based fragility curves, high-fidelity [1] or simplified [12] model of the existing buildings may be implemented. In previous research, some of the present authors developed a simplified Seismic Model from Ambient Vibration (SMAV) [8,11] that has been implemented in the methodology presented in the following sections.…”

Section: The Smav Modelmentioning

confidence: 99%

“…On the other hand, one of the authors proposed a linear elastic beam-like model in previous works [12][13][14] that is another way to perform low computational burden analysis on large scale. As this author claimed in a previous work, "the use of reliable numerical models based on a reduced number of structural or dynamic information", such as the equivalent beam-like model or SMAV model that is engaged in this work, "represents a powerful tool with economic and decision-making advantages" [12].…”

Section: Introductionmentioning

confidence: 99%

The Use of SMAV Model for Computing Fragility Curves

et al. 2022

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Among the buildings with strategic role for civil protection purposes part of them were built before the introduction of modern seismic codes. Aiming to guarantee their operability in case of seismic events, they have to be assessed and, hopefully, seismically upgraded. This aspect arises the necessity of reliable low computational demanding numerical models and probabilistic strategies that can be easily adopted in case of the assessment of conspicuous building stock. Part of the authors proposed and validated, in previous works, a low-demanding seismic model calibrated on ambient vibrations (SMAV) that is engaged in this paper for calculating fragility curves. On the base of dynamic and geometric properties, the SMAV model simulates the dynamic response of buildings. The herein proposed procedure adopts the SMAV model and takes into account the direction of seismic input in a probabilistic manner. The use of the ASI scale as an Intensity Measure parameter is discussed and the results are compared to those obtained with others IM scales. Although SMAV implements an equivalent linear procedure the results are compared with those obtained by more sophisticated FEM models and nonlinear dynamic analyses with a satisfactory agreement. Finally, two real case studies are presented. The fragility curves for both the case studies are calculated and discussed. The results encourage the authors to the use of fragility curves based on SMAV model. Additionally, the fragility curves can be easily implemented in seismic risk assessment procedures at urban or territorial scale and, consequently, the proposed procedure may represent a key aspect in the reduction of seismic risk and rationalization of investments for the seismic upgrading of strategic buildings.

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“…Several MDOF simplified models have been presented in the scientific literature for the evaluation of both linear and nonlinear dynamic response of multi-storey buildings and particular interest has been devoted to beam-like equivalent models. Most of these studies deal with linearelastic models [1,2,3,4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

An inhomogeneous inelastic beam-like model for dynamic analyses of multistorey buildings

Fiore

2023

Theoretical and Applied Mechanics - AIMETA 2022

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Abstract. This study presents an original inelastic beam-like model for the simulation of the nonlinear dynamic behaviour of three-dimensional buildings subjected to earthquake loadings. The proposed model is defined as a step-wise shear only cantilever beam, whose segments have the same mechanical properties of the corresponding inter-storeys of the building. The inter-storey constitutive laws are calibrated by means of the results of a static nonlinear analysis performed on the 3D FEM model of the building. An inverse nonlinear static identification procedure allows obtaining an inelastic beam-like model equivalent to the more demanding 3D FEM model, related to a specific direction and under a precise distribution of horizontal loadings. Dynamic nonlinear analyses performed on this simplified model allow a drastic reduction of the required computational effort and time with respect to the more demanding 3D FEM model. The reliability of the proposed beam-like model is validated through numerical applications on an irregular multi-storey RC frame representative of residential buildings in Catania designed to resist only gravity loadings.

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An Equivalent Non-Uniform Beam-Like Model for Dynamic Analysis of Multi-Storey Irregular Buildings

Cited by 17 publications

References 28 publications

Analysis of the Recorded Response of a School Building Heavily Damaged by the 2016 Central Italy Earthquake

Analysis of the Recorded Response of a School Building Heavily Damaged by the 2016 Central Italy Earthquake

The Use of SMAV Model for Computing Fragility Curves

An inhomogeneous inelastic beam-like model for dynamic analyses of multistorey buildings

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