MULTISCALE MODEL CALIBRATION BY INVERSE ANALYSIS FOR NONLINEAR SIMULATION OF MASONRY STRUCTURES UNDER EARTHQUAKE LOADING

Autor: Lorenzo Macorini, Corrado Chisari, Bassam A. Izzuddin
Přispěvatelé: Chisari, Corrado, Macorini, Lorenzo, Izzuddin, Bassam, Commission of the European Communities
Rok vydání: 2020
Předmět:
Mathematics
Interdisciplinary Applications
Technology
Computer Networks and Communications
Interface model
Calibration (statistics)
Computational Mechanics
Engineering
Multidisciplinary
0915 Interdisciplinary Engineering
Multi-objective optimization
PARAMETERS
plastic-damage model
Engineering
Virtual test
MICROPOLAR
Inverse analysis
COMPUTATIONAL HOMOGENIZATION
Science & Technology
IDENTIFICATION
CONTINUA
business.industry
Applied Mathematics
0103 Numerical and Computational Mathematics
macroscale modeling
Structural engineering
dynamic analysis
Masonry
mesoscale modeling
Nonlinear system
Identification (information)
multi-objective optimization
virtual test
ELEMENT
Control and Systems Engineering
COSSERAT
Physical Sciences
WALLS
Multi-objective optimisation
macroscale modelling
mesoscale modelling
virtual test
dynamic analysis
plastic-damage model
business
INTERFACE MODEL
Mathematics
Zdroj: International Journal for Multiscale Computational Engineering. 18:241-263
ISSN: 1543-1649
DOI: 10.1615/intjmultcompeng.2020031740
Popis: The prediction of the structural response of masonry structures under extreme loading conditions, including earthquakes, requires the use of advanced material descriptions to represent the nonlinear behaviour of masonry. In general, micro- and mesoscale approaches are very computationally demanding, thus at present they are used mainly for detailed analysis of small masonry components. Conversely macroscale models, where masonry is assumed as a homogeneous material, are more efficient and suitable for nonlinear analysis of realistic masonry structures. However, the calibration of the material parameters for such models, which is generally based on physical testing of entire masonry components, remains an open issue. In this paper, a multiscale approach is proposed, in which an accurate mesoscale model accounting for the specific masonry bond is utilised in virtual tests for the calibration of a more efficient macroscale representation assuming energy equivalence between the two scales. Since the calibration is performed offline at the beginning of the analysis, the method is computationally attractive compared to alternative homogenisation techniques. The proposed methodology is applied to a case study considering the results obtained in previous experimental tests on masonry components subjected to cyclic loading, and on a masonry building under pseudo-dynamic conditions representing earthquake loading. The results confirm the potential of the proposed approach and highlight some critical issues, such as the importance of selecting appropriate virtual tests for model calibration, which can significantly influence accuracy and robustness.
Databáze: OpenAIRE
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