Abstract
The paper studies estimate ultimate strength and local buckling of circular concrete filled steel tube (CFST) specimens subjected to axial load using strain gage, force transducer and displacement sensor. The strain responses of CFST column in testing procedure and the results of finite element modelling will be used to predict failure modes when cracks occur in concrete core and deformation increases on steel tube’s surface. Besides, the principles of Eurocode 4 and AISC 360-10 are used to calculate the critical buckling stress in comparison with experimental approach and numerical evaluation. Combining experimental and simulation data can be very useful for diagnostic load rating and limit, and effective to evaluate the damage on structural health monitoring of CFST members.
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