Nonlinear analysis of ECC-encased CFST columns under axial compression. (September 2020)

• Record Type: Journal Article
• Authors: Cai, Jingming; Pan, Jinlong; Tan, Jiawei; Vandevyvere, Brecht; Li, Xiaopeng
• Is Part Of: Journal of building engineering. Volume 31(2020)
• Publication Date: 2020-09
• Subjects: ECC -- CFST -- Compression -- Finite element modeling; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2020.101401
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: In order to analyze the mechanical behaviors of engineered cementitious composite (ECC)-encased concrete filled steel tube (CFST) columns under uniaxial compressive loading, a finite element (FE) model was established with the software of ABAQUS/standard solver. The constitutive models for concrete, steel and ECC were discussed and the accuracy of the proposed FE model was verified with the previous experimental results. The failure mechanism of ECC-encased CFST columns under uniaxial compressive loading was investigated with the proposed FE model, it was found that ECC-encased CFST column has better composite effects and compatible deformation behavior between different components. In addition, parameter analysis involving different material strength and sectional dimensions was also conducted. According to the failure mechanism and parameter analysis, a simplified calculating method was proposed and the validity was verified with experimental results. Highlights: A new FE model was proposed to investigate the compressive 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 simplified calculating method was also proposed and verified.