1 Graduate students, Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USA
2 Graduate student, Department of Civil, Architectural and Environmental Engineering, Drexel University,
Philadelphia, PA 19104, USA
3 Assistant Professor, Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USA
4 Professors, Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USA
ABSTRACT
Drexel researchers are currently conducting experiments to determine the mechanical behavior characteristics of hollow and fully grouted concrete masonry assemblages, as part of a project funded by the National Science Foundation involving Drexel University, University of Minnesota and University of California-San Diego. The ultimate goal of this study is to thoroughly investigate system-level seismic performance and improve design provisions of partially grouted reinforced masonry buildings.
This paper presents preliminary results regarding full surface displacement and strain fields extracted using the Digital Image Correlation (DIC) technique. DIC, which is a non-contact optical metrology and a non-destructive evaluation method, has been implemented and cross-validated on hollow and fully grouted concrete masonry specimens subjected to axial, bed joint shear and diagonal tension loading. The presented investigation intends to evaluate advantages and challenges of this approach. The obtained DIC data from this research can provide high resolution and full field in-plane and out-of-plane displacements depending on the testing configuration. Global strain measurements as well as strain concentrations can be extracted and DIC is capable to predict crack initiation sites and in-situ monitor the evolution of dominant damage mechanisms.
KEYWORDS: masonry assemblages, digital image correlation, bed joint shear, failure mechanisms
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