A simple model for damage analysis of a frame-masonry shear-wall system

[摘要] This paper is aimed at evaluating dissipation and deformation capacities of frame-masonry shear-wall systems in post-cracking regime. A simple planar model consisting of a cracked masonry shear-wall, containing a centered window, confined on three sides by a portal frame, is formulated. Kinematics is linear and accounts for an overall shear mode and local sliding modes, these latter describing relative motions among the cracked parts of the wall. A periodic horizontal force, roughly representative of the seismic actions, is acting at the top of the portal frame. An isotropic nonlinear damage law is adopted, and an Extended Galerkin-based variational formulation is followed to derive a low-dimensional discrete system. An ad-hoc resolution algorithm, based on a predictor-corrector scheme, is implemented, and numerical results discussed. (C) 2017 Elsevier Ltd. All rights reserved.

[发布日期] 2017-12-15

[关键词] Infill masonry framed;Nonlinear analysis;Simple discrete model;Shear post-cracking behavior;Elastic-damage;Linear softening