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http://dx.doi.org/10.7734/COSEIK.2019.32.6.409

Non-linear Dynamic Analysis of Reinforced Concrete Slabs Subjected to Explosive Loading Using an Orthotropic Concrete Constitutive Model  

Lee, MinJoo (Division of Civil and Environmental Engineering, KAIST)
Kwak, Hyo-Gyoung (Division of Civil and Environmental Engineering, KAIST)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.32, no.6, 2019 , pp. 409-416 More about this Journal
Abstract
An improved numerical model for non-linear analysis of reinforced concrete (RC) slabs subjected to blast loading is proposed. This approach considers a strain rate dependent orthotropic constitutive model that directly determines the stress state using the stress-strain relation acquired from the data obtained using the biaxial strength envelope. Moreover, the bond-slip between concrete and reinforcing steel is gradually enlarged after the occurrence of cracks and is concentrated in the plastic hinge region. The bond-slip model is introduced to consider the crack direction of the concrete under a biaxial stress state. Correlation studies between the numerical analysis and the experimental results were performed to evaluate the analytical model. The results show that the proposed model can effectively be used in dynamic analyses of reinforced concrete slab members subjected to explosive loading. Moreover, it was determined that it is important to consider biaxial behavior in the material model and the bond-slip effect.
Keywords
orthotropic constitutive model; strain rate effect; bond-slip; dynamic analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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