Equivalent Frame Modelling of Masonry Walls Based on Plasticity and Damage. Issue 7 (3rd October 2019)

• Record Type: Journal Article
• Authors: Sangirardi, Marialuigia; Liberatore, Domenico; Addessi, Daniela
• Is Part Of: International journal of architectural heritage. Volume 13:Issue 7(2019)
• Page Start: 1098
• Page End: 1109
• Publication Date: 2019-10-03
• Subjects: Bouc-Wen model -- damage -- equivalent frame -- hysteresis -- masonry; Architecture -- Conservation and restoration -- Periodicals; Historic buildings -- Periodicals; Historic preservation -- Planning -- Periodicals; 721.0288
• DOI: 10.1080/15583058.2019.1645240
• Languages: English
• ISSNs: 1558-3058

Abstract

ABSTRACT: This paper presents a force-based equivalent frame procedure applied to analyse masonry walls structural response under cyclic loadings. The presented macroelement formulation, consisting in the arrangement in series of a central elastic beam, two nonlinear flexural hinges at the ends and a nonlinear shear link, adopts a smooth hysteresis model for these latter, where a scalar damage variable is introduced to reproduce strength and stiffness degradation. Main points of the adopted force-based macroelement and hysteresis model are recalled, with emphasis on the capability to reproduce the typical in-plane cyclic response of masonry. Validation of the element is presented through various examples, comparing numerical and experimental results. The first validation set is composed by a group of four panels, characterized by different boundary conditions and pre-compression levels. The second validation case is a classical literature benchmark, in which the performance of the model is tested in case of a wall with openings composed of piers, spandrels and rigid links. Moreover, for this example, numerical results obtained with the presented equivalent frame approach are also compared with a more refined numerical model, showing limits and advantages of simplified procedures.