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Nonlinear Finite Element Analysis of RC Shear Walls under Cyclic Loadings  

곽효경 (한국과학기술원 건설및환경공학과)
김도연 (한국과학기술원 건설및환경공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.16, no.4, 2003 , pp. 353-367 More about this Journal
Abstract
This paper describes the extension of the numerical model, which was developed to simulate the nonlinear behavior of reinforced concrete (RC) structures subjected to monotonic in plane shear and introduced in the companion paper, to simulate effectively the behavior of RE structures under cyclic loadings. While maintaining all the basic assumptions adopted in defining the constitutive relations of concrete under monotonic loadings, a hysteretic stress strain relation of concrete, which across the tension compression region, is defined. In addition, unlike previous simplified stress strain relations, curved unloading and reloading branches inferred from the stress strain relation of steel considering the Bauschinger effect we used. The modifications of the stress strain relation of steel are also introduced to reflect pinching effect depending on the shear span ratio and an average stress distribution in a cracked RC element. Finally, correlation studies between analytical results and experimental studies are conducted to establish the validity of the proposed model.
Keywords
cyclic loadings; hysteretic stress-strain; shear walls; pinching effect; arc-length method;
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