Numerical analysis of 3d truss bridge using ANSYS

Abstract

Trusses are typically lighter and more cost-effective than alternative structural support systems and are used in a variety of structures including vehicle frames, mechanical equipment, buildings, bridges, and towers. A truss structure takes advantage of the inherent geometric stability of the triangle to evenly distribute weight and to handle changing tension and compression. This project deals with the analysis of a 3D truss bridge which is proposed to be constructed connecting the two platforms of the Tripunithura railway station, with three different deck materials glass fibre reinforced concrete (GFRC), concrete and steel. Analysis and design of the proposed structure is carried out using ANSYS (Workbench) 2022 R2 software. ANSYS is an analysing software that is used for mechanical product designs and civil structure designs. It uses computer based numerical techniques to solve problems. This software helps to engineer and design complex, highly nonlinear and large models. It enables to design and manage 3D structures in steel, concrete and glass fibre reinforced concrete (GFRC). Structural performance of 3D truss bridges with three different deck material in terms of axial force, shear stress and deformation are compared in order to find which combination of materials will give better performances. Dynamic analysis is performed to examine the frequency and modes of vibrations caused by the movement of trains.