Performance of Concrete Filled Steel Tube (CFST) Section: A Review

Abstract

Concrete Filled Steel Tube (CFST) is the composite section formed by filling concrete into a hollow steel tube. The CFST section resists applied load through the composite action of concrete and steel, this advantageous interactive behavior between steel tubes and concrete increases the strength of CFST section and hence it has become popular in recent days and is being used in structures such as bridges, electricity towers, buildings etc. Extensive works carried out on CFST in past years have indicated that the CFST sections possess high ductility, strength and stiffness properties. These properties are considered to be important, especially for the multi-storied buildings required to be erected in earthquake prone areas. Therefore, behaviour of buildings with CFST sections needs to be studied. The present paper reviews various research works carried out by several researchers on CFST sections for investigating the behavior considering parameters such as length to diameter (L/D) ratio, Diameter to thickness (D/t) ratio, thickness of steel tube etc.

Application of Alkali-Resistant Woven Fibre Mesh Confinement to Strengthen Lightweight Foamed Concrete

“…When the age of curing is increased, the tensile strength of the material will increase to its maximum potential. According to the findings, one can therefore draw the conclusion that an increase in the number of layers of woven fibre mesh in the LFC led to a better adhesion to the cementitious material [23,24]. The significant increase in the tensile strength of LFC was due to the higher flexibility of the woven fibre mesh, which caused a higher strain on the cement matrix [25,26].…”