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Seismic Analysis of RC Subway Station Structures Using Finite Element Method
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 Title & Authors
Seismic Analysis of RC Subway Station Structures Using Finite Element Method
Nam, Sang-Hyeok; Song, Ha-Won; Byun, Keun-Joo;
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 Abstract
Even though a lot of advanced researches on analysis, design, and performance evaluation of reinforced concrete (RC) under seismic action have been carried out, there has been only a few study on seismic analysis of underground RC structures surrounding soil medium. Since the underground RC structures interact with surrounding soil medium, a path-dependent soil model which can predict the soil response is necessary for analyzing behavior of the structure inside soil medium. The behavior of interfacial zone between the RC structure and the surrounding medium should be also considered for more accurate seismic analysis of the RC structure. In this paper, an averaged constitutive model of concrete and reinforcing bars for RC structure and path-dependent Ohsaki`s model for soil are applied, and an elasto-plastic interface model having thickness is proposed for seismic analysis of underground RC structures. A finite element analysis technique is developed by applying aforementioned constitutive equations and is verified by predicting both static and dynamic behaviors of RC structures. Then, failure mechanisms of underground RC structure under seismic action are numerically derived through seismic analysis of underground RC station structure under different seismic forces. Finally, the changes of failure mode and the damage level of the structures are also analytically derived for different design cases of underground RC structures.
 Keywords
finite element method;seismic analysis;underground RC structure;soil-structure interaction;elasto-plastic interface model;
 Language
Korean
 Cited by
 References
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