Research Information System
9th Turkish Conference on Earthquake Engineering, İstanbul, Turkey, 2 - 03 June 2021, vol.21, no.1, pp.173-180
Masonry is a
composite material made of masonry blocks (brick, stone etc.) and mortar
between the masonry blocks. Modeling is one of the most efficient ways of
analyzing a structure in the closest way to the truth. Modeling of masonry
structures is a significant necessary to strengthen historical masonry
structures as well as to construct modern masonry structures. Throughout the engineering
history, engineers, architects and researchers have worked to design durable
and strong masonry walls. Numerical models can be used for designing masonry
structures and verification of experiments on masonry structures. The finite
element analysis (FEA) is extensively preferred numerical technique to model
masonry structures. Confined masonry wall is one of the most encountered
masonry wall types especially in earthquake prone regions. Confined masonry
walls are generally preferred systems in building type structures. In this
study, confined walls under in-plane cyclic loading are analyzed based on
finite element method. Nonlinear structural behaviors of confined masonry walls
are modeled and analyzed using 3D finite element models. Presentation of a nonlinear numerical model for a
finite element software for masonry walls is one of the focus points of this
study. Continuous micro modeling technique is used to model the masonry infill.
The Drucker-Prager failure hypothesis a suitable hypothesis for materials which
have high compressive strength but having low tensile strength, is used to specify
the fracture mechanisms of the confined masonry walls. The modeling technique,
the material model and the fracture hypothesis form a combination to model the
confined masonry walls numerically. The hypothesis is used with elastoplastic
material model to reflect the nonlinear behavior of the structure. The
interaction between the masonry infill and frame is considered using contact and
target finite elements. Masonry wall-frame system under both static and cyclic
loading are analyzed. Confined masonry walls having different infill ratio are
analyzed using the presented finite element model. The results obtained by the
3D finite element analysis on the confined masonry walls were found to be
compatible with the experimental results in the literature. By using the finite
element analyzes presented in this study, confined masonry walls can be
successfully determined using the contact and target elements. It was seen
that; confined masonry walls had generated dramatically more durable structure
than masonry walls without confined frame systems. It can be stated that, the
formed short column effect has significant effect on the strength and ductility
of the confined masonry wall-frame system.