Abstract
The behavior of composite column that consists of an exterior wood panel with concrete encased steel (CES) core, hereafter referred to as Engineering Wood Encased Concrete-Steel (EWECS) composite columns, is investigated. Nonlinear analysis is done by using finite element software, ANSYS APDL, to study the seismic performance of the columns. Verification of the finite element modeling is done by comparing and corresponding experimental result that reported by one of the authors, then it is used as a reference for parametric study. The parameters in the parametric study are the use of fiber reinforced concrete (FRC), the use of Indonesian wood and the use of friction element. The results are presented in the form of hysteresis characteristics, failure mode, and principal stress distribution. It is demonstrated that the seismic performance of the EWECS composite columns can be accurately predicted by proposing finite element modeling. Obtained results from the parametric study show that various FRC, different wood, and the contact element influences the hysteresis loops and behavior of the columns. The flexural capacity of the columns is improved about 7-17% by adding steel fiber. In addition, the typical Indonesian wood (Matoa) enhances the flexural strength about 3.3%. Moreover, the use of a friction element affects the seismic behavior significantly.
Highlights
The innovation of the composite column structure has been widely researched and developed
Model VF1 displays a 7% increase in maximum flexural capacity, while Model VF2 displays a 17% increase in maximum flexural capacity to resist the lateral load. These results indicate that the use of fiber reinforced concrete (FRC) affects to the seismic performance of the Engineering Wood Encased Concrete-Steel (EWECS) column
A nonlinear finite element (FE) analysis of the seismic behavior of EWECS composite column has been conducted in this study
Summary
The innovation of the composite column structure has been widely researched and developed. A new composite structure has been developed in Japan as a solution for this limitation called Engineering Wood Encased Concrete-Steel (EWECS) composite structure. The woody panel can improve the behavior of structures on the column through its action of confining the CES cores and resisting to bending moments, shear, and buckling. The experimental study requires adequate facilities, space, setting, and labour If it is done correctly, finite element (FE) analysis is a powerful tool that can be an attractive alternative as a substitute and validate for experimental testing. The material was considered as non-linear behavior material [6]
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