Behavior of ECC-encased CFST columns under eccentric loading. (July 2020)

• Record Type: Journal Article
• Authors: Cai, Jingming; Pan, Jinlong; Tan, Jiawei; Vandevyvere, Brecht; Li, Xiaopeng
• Is Part Of: Journal of building engineering. Volume 30(2020)
• Publication Date: 2020-07
• Subjects: ECC -- Composite columns -- Finite element analysis -- Eccentric loading; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2020.101188
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: In this paper, the eccentric load behavior of engineered cementitious composite (ECC)-encased concrete filled steel tube (CFST) is analyzed based on ABAQUS/standard solver. A finite element (FE) model was established with consideration of different constitutive models, and the accuracy of proposed FE model was verified with experimental results. Failure mechanisms of ECC-encased CFST columns under eccentric loading were investigated; it was found that the eccentricity ratio has a great influence on the failure processes of the composite column, also the confinement effect decreased as eccentricity ratio increased. Based on the proposed FE model, parameter analysis was conducted to investigate the influences of different material strength and sectional dimensions. Based on stress analysis from the proposed FE model, a theoretical model for predicting sectional capacity of ECC-encased CFST columns has also been proposed and verified. Highlights: A new FE model was proposed to investigate the eccentric behavior of ECC-encased CFST column. The failure mechanisms of the composite column were discussed with the proposed FE model. The influences of different parameters were investigated with the proposed FE model. A theoretical model for predicting the sectional capacity of ECC-encased CFST columns was also proposed and verified.