期刊
JOURNAL OF BUILDING ENGINEERING
卷 44, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jobe.2021.102883
关键词
Composite columns; High strength concrete; High strength steel; ECC encasement; Finite element modelling; Compressive strength
资金
- UNSW Canberra's support through UIPA Scholarship
- Australian Government RTP
The study presents a comprehensive numerical parametric investigation on the axial compressive behaviors of ECC-CES columns, establishes a criterion for effective material stresses for FE modeling, validates FE analysis results against experiments, conducts a detailed parametric study on material strengths, geometric dimensions, and column scaling effects. Furthermore, practical design implications and the applicability of a squash load formula for predicting ultimate capacity are recommended and evaluated.
This paper presents the results of a comprehensive numerical parametric study on axial compressive behaviours of recently introduced Engineered Cementitious Composites (ECC) confined concrete encased steel composite columns (ECC-CES). For that purpose, a criterion to calculate the effective material stresses for non-linear finite element (FE) modelling of ECC-CES columns is first established. The results of criteria-based FE analysis are validated against the experimental results in terms of failure mode, column strength and load-deformation response, and a good agreement is demonstrated. The validated FE model is then employed to conduct a detailed parametric study. The effects of extended range of material strengths, geometric dimensions and column scaling on the axial compressive performance of ECC-CES columns are investigated. Based on the finite element analysis (FEA) results, some important implication for practical design of ECC-CES columns are recommended. In addition, the applicability of a simple squash load formula to predict the ultimate capacity of ECC-CES columns is also evaluated and discussed against the results of comprehensive parametric study.
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