Abstract
Experimental test results can provide valuable information regarding the behavior of structural members. However, understanding the mechanical performance of members through experiments may be challenging. For instance, investigating the physical interaction between the steel tubes and the in-filled concrete in CFST/CFDST members through experimental research is complicated, particularly when the provided confinement effect is ununiform. Engineers may now profit from the use of high-strength and ultrahigh-strength steel and concrete and steel tubes with intricate geometries like corrugated tubes, thanks to recent breakthroughs in material engineering. However, the design of CFST/CFDST members manufactured using innovative materials necessitates a thorough knowledge of their behavior, which can be very time consuming and costly to achieve through experimental experiments. With the recent advances in computer capacity and finite element (FE) software, researchers can now investigate the structural performance of members through performing numerical modelings such as FE analysis or fiber element analysis. This chapter discusses the structural performance of CFST/CFDST members, including columns, beams, and beam columns using FE analysis. The methods for modeling the plastic behavior of confined concrete are introduced. Besides, the effects of a wide range of parameters on the behavior of composite members are addressed in detail. A detailed investigation is also conducted on the structural performance of composite members made from corrugated steel tubes.
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