Soraya Roosta and Yi Liu
Soraya Roosta, PhD Candidate, Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada, Soraya.roosta@dal.ca
Yi Liu, Professor, Department of Civil and Resource Engineering, Dalhousie University, Halifax, NS, Canada, Yi.liu@dal.ca
ABSTRACT
This paper presents the development of a finite element model in OpenSees to simulate the behaviour of all-masonry infilled frames subjected to lateral loading. All-masonry infilled frames
refer to an infilled frame system where both the bounding frame and the infill panel are made of concrete masonry units. While masonry columns and beams can be constructed from large
masonry boundary element units and are reinforced and fully grouted, the infill panel can be constructed with standard concrete masonry units with no reinforcement and grouting. The finite element model developed in this study is a macro-model consisting of multi-strut and special shear springs to consider the compressive and shear failure of the infill and its effect exerted on the
bounding frame. The validation of the model, conducted through the comparison of experimental and numerical load vs. displacement responses and failure modes, showed that the proposed model is capable of providing accurate simulation results including the post-ultimate behaviour. The comparison between the proposed and other macro-models in the available literature showed that the proposed model performed better in providing estimates in stiffness, strength, and load vs. deflection responses.
KEYWORDS: concrete masonry infills, masonry frames, finite element study, macro-model, shear spring, multi-strut
