Dynamic analysis of concrete structure under blast load using plastic damage model.
Jin Won Nam, Yonsei University
Ho Jin Kim, Yonsei University

Hyung Jin Choi, Karagozian & Case Inc.

Professor Ha-Won Song, Yonsei University

Abstract:
Concrete, quasi brittle material, is well known as rate dependent under extreme dynamic loading conditions and its failure process is influenced by cracks. These characteristics can be modeled by incorporating appropriate material model into dynamic analysis. In this work, a plastic damage model is applied in a dynamic analysis to predict damage and failure progression for concrete wall under blast load. Within the framework of continuum damage mechanics, a modified plastic damage model for concrete is presented, so called homogenized crack model (HCM). The HCM is numerically implemented with the explicit finite element method. The effects of modified plastic damage model are demonstrated through both simple single element analyses for concrete materials and also structural level simulations of a concrete panel subjected to various blast loading conditions. The results qualitatively illustrate the value of HCM for concrete materials under extreme dynamic loading conditions.

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