Behavior of steel tubular poles partially filled with concrete

Abstract

Steel circular poles are superior to be traditional poles, as they are more durable and lighter in weight. Thin walled steel circular poles often fail by local buckling in bending, before reaching the max. tensile strength of steel. This problem can be solved by increasing wall thickness, but this solution will increase material cost significantly. An economical and simple solution is to stuff the pipe partly with concrete. this research aims to conduct the optimum concrete stuffed length to achieve the max. moment strength with possible least self-weight in steel poles.