Behavior of self-cured self-compacting concrete filled short channel columns under axial compression

Abstract

Composite columns have been suggested as a preferable option for parking lots, submarine pipelines, multi-story structures, and bridge piers. The advantages of the inherent material qualities of both materials make the combination of cold-formed steel and concrete noteworthy. A hollow steel tube with a concrete core inside of it, with or without extra reinforcing, makes up a column made of steel tubes and concrete. Columns made of steel tube which is filled with concreteare constructed using steel tubes with normal geometric sections or eccentric geometric sections. Furthermore, there isn't yet a published Indian design standard that is specifically for the construction of such composites. The objectives of this lab is to investigate the structural behavior of simple & lipped cold-formed steel constructed shortcolumns filled with concrete with respect to the load–deflection graph, maximumcapacity to carry loads, concrete containment, and plasticity. It has been determined that a unique form of self-compacting concrete that partially replaces cement with fly ash and waste granite dust can be used for structural purposes. The failure pattern of the box configuration is explored by testing a total of three constructed lipped sectionsand three constructed plain sections. The load against axial shrinking curve is illustrated, and its specific impact just on capacity to carry loads is discussed. For specimens aforementioned, the analytical analysis yielded the relationship between load and axial shortening. Equations with distinct constants and their upper and lower bounds for the relevant specimens are derived using MATLAB. These formulas can be utilized to calculate how axial shortening and load for each specimen relate to one another. The lipped sections are better capable of withstanding loads than plain sections, according to the study outcomesof the column made of steel filled with concretespecimens.