An Experimental Study on Axial Compressive Behaviour of Rubberized Concrete Filled Circular Steel Tublar Columns

Abstract

RCC and steel frames have been the most common frame systems for a long time whereas the composite frame system has also emerged as a popular system for high-rise buildings for a few decades. Multi-story composite Structures are generally composed of steel members made composite with concrete. The use of concrete-filled steel tubes (CFST) in building construction has seen a renaissance in recent years due to their numerous advantages, apart from their superior structural performance making a typical composite frame structure. Their usage as columns in high-rise and multi-story buildings, as beams in low-rise industrial buildings, and as arch bridges, has become extensive in many countries in the last four decades with abundant examples. But, their usage in Nepal is a new concept. Hence, this paper shall primarily emphasize investigating the various aspects of CSFT members in the building industry; primarily considering the various aspects of these members which have turned its unique phase with the advancement of technology. With different volume replacement ratios of rubber coarse aggregate concrete-filled steel tube (RUCFST) columns were fabricated. Then axial compressive tests were completed. With different volume replacement ratios of rubber coarse aggregateConcrete-filled steel tube (RUCFST) columns were fabricated. Then axial compressive tests were completed. The test results show that RUCFST columns reveal lesser axial compressive capacity and higher ductility than normal CFST columns. In this paper, an attempt is made to study the strength properties of CFST Structure Using Waste Tyre Rubber in different proportions i.e. 5%, 10%,15%,20% replacing Coarse Aggregate, and strength is tested.