Nonlinear Finite-Element Model of Hollow Masonry

Abstract

A nonlinear elastoplastic finite-element (FE) model for face-shell-bedded hollow masonry using isoparametric shell elements has been developed. The nonlinear behavior of the masonry in compression due to progressive cracking, and geometric and material nonlinearities is considered in the model. Details of the elastoplastic constitutive model and failure criteria for both blocks and mortar joints are presented. Results from a simulated test of a three-block-high prism are given in the form of stress, strain, and displacement plots. The behavior of the model is compared to known experimental behavior. The methodology, when combined with the substructuring technique, will allow analysis of substantially larger walls than would the more typical full three-dimensional (3D) analysis.