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Published February 2013 | Published
Journal Article Open

Virtual Earthquake Engineering Laboratory Capturing Nonlinear Shear, Localized Damage and Progressive Buckling of Bar

Cho, In Ho


We embarked upon developing a novel parallel simulation platform that is rooted in microphysical mechanisms. Primarily aiming at large-scale reinforced-concrete structures exposed to cyclic loading, we sought to settle the question as to how to capture nonlinear shear, localized damage and progressive buckling of reinforcing bar. We proposed a tribology-inspired three-dimensional (3-D) interlocking mechanism in the well-established framework of multidirectional smeared crack models. Strong correlation between random material property and localized damage has been shown, notably at the global system level. An automated platform has been suggested to capture progressive buckling phenomena. Validation and applications straddle a wide range, from small laboratory tests to large-scale 3-D experiments, successfully offering a clear causal pathway between underlying physical mechanisms and the unresolved issues addressed above.

Additional Information

© 2013 Earthquake Engineering Research Institute. Received 4 October 2011; accepted 19 February 2012. Regarding experimental data for validation, the warm hospitality of Professor Daniel Palermo, Professor Frank J. Vecchio, and Professor John W. Wallace is appreciated. All numerical simulations related to the present work were run on GARUDA, a high-performance computing cluster hosted within the civil engineering department at Caltech. The purchase and installation of GARUDA was in large part possible thanks to the Ruth Haskell Research Fund, the Tomiyasu Discovery Fund, and Dell Inc. Professor S. Krishnan's warm support with the cluster is deeply appreciated. Special thanks are due to Professor J. F. Hall for his consistent support and productive discussion.

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