The paper discusses the structural behaviour of concrete-filled steel tube columns (CFT) when applied to top-down construction method as temporary internal supports for ceilings. Their ultimate capacity take into account actual boundary conditions column is essential successful application in construction. presents full-scale situ testing four slender specimens with variable D/t ratios under co...

This paper proposes a new simplified restoring force characteristic model of the bending moment–rotation angle relationship for square concrete-filled steel tube (CFT) beam-columns to estimate elastoplastic flexural-shear behavior from short slender beam-columns. The CFT beam-column incorporates reduction in strength after ultimate strength. proposed is multilinear and involves cracking point, ...

In multi-dimensional signal processing the Cliiord Fourier transform (CFT or in the 2-D case: quater-nionic Fourier transform/QFT) is a consequent extension of the complex valued Fourier transform. Hence, we need a fast algorithm in order to compute the transform in practical applications. Since the CFT is based on a corresponding Cliiord algebra (CA) and CAs are not commutative in general, we ...