Second Order Analysis of Hollow Tapered Circular Bridge Pier

Abstract

The Beams subjected to the axial force and lateral force simultaneously are known as beam-columns. Bridge pier is idealized as a column subjected to axial load and biaxial moment. Slender member subjected to axial force and biaxial bending moment fails due to buckling effect. This buckling is caused due to slenderness effect also known as ‘PΔ’ effect. The objective of the research reported in this paper is to obtain a theoretical formulation, using beam column theory for studying the behavior of straight hollow circular section and tapered hollow circular section of the bridge pier. Study is carried for different heights of bridge pier for straight hollow circular pier and tapered hollow circular pier. Study is carried by considering two lane box type bridge girder. Providing a straight hollow circular section for a direct & flexural action proves to be uneconomical. The straight hollow circular section of bridge pier is replaced by a tapered hollow circular pier section in the present study.