Study on the ratio of three dimensions of the flange thickness, pipe wall thickness and bolt diameter in round steel pipe connections in torsion-bearing tower and pier structures in Vietnam

Abstract

For tower and pier structures, it is important to calculate and check the stability. Torsional instability is the most complex and typical with this structure. In addition to the solutions of horizontal and diagonal rigid wall arrangement in height, the position of connecting side steel pipes at the connection joints should be considered. In fact, in cases where the structure is unstable, failure often occurs at the connection joints.

This paper aims to make recommendations on the ratio of three dimensions of flange thickness, pipe wall thickness and bolt diameter in round steel pipe connections in tower and pier structures in Vietnam using round steel pipes as torsion-bearing side bars to help optimize size selection when designing steel structure towers and piers. In addition, the bearing capacity of the structure and the economy are still guaranteed.