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International Journal for Multiscale Computational Engineering
Fator do impacto: 1.016 FI de cinco anos: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Imprimir: 1543-1649
ISSN On-line: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2012003645
pages 139-159

FROM MICRO- TO MACROMODELS FOR IN-PLANE LOADED MASONRYWALLS: PROPOSITION OF A MULTISCALE APPROACH

Antonella Cecchi
Department of Architecture Construction Conservation (DACC), University IUAV of Venice, Dorsoduro 2206, Venice, 30123, Venice, Italy
Alessia Vanin
University IUAV di Venezia, ex Convento delle Terese, Dorsoduro 2206; 30123 − Venice, Italy

RESUMO

A multiscale model for the structural analysis of the in-plane response of masonry panels, characterized by periodic arrangement of blocks and mortar, is here presented. The model is based on two-scale use: at the microscopic level a classical Cauchy continuous is used, while at the macroscopic level a discrete macroelement model is adopted. Extensive literature exists on micro and macro approaches for masonry, but theories investigating a relationship between the two scales of analysis are still to be developed. With this aim, the authors propose a possible strategy to overcome the critical gap between two approaches. In particular, at the microlevel a homogenization procedure is used to calibrate a strut and tie model at the macrolevel. The purpose is refined modeling of a pier trough micro and macro relationship to analyze, in the perspective, complex masonry structures like historical buildings. Identification between continuous homogenized masonry panels and discrete systems of trusses is based on the equivalence of power spent in the two systems under the same boundary conditions. Hence a strut and tie macromodel in which truss inclination and truss stiffness calibration is obtained from homogenization microanalysis is proposed. In this way it is possible to take into account the sensitivity of some constitutive factors and geometric parameters of masonry, i.e., the arrangement of blocks. To verify the reliability of the procedure, some meaningful cases are analyzed.


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