Analysis and Design of Railway Plate Girder and Truss Bridge

Abstract

Plate girder may be riveted, bolted, or welded. Plate girders resist transverse bending like beams and are provided where loads are heavy. For heavier loads, the section modulus required is not available in any standard rolled section. In such case riveting or welding plates fabricates a beam section and angle sections to forms a plate girder. Plate Girder Bridge is adopted for simply supported spans in the range of 20 to 50 m and for continuous span up to 250m.

Steel truss bridges are generally economical in the span range of 100 to 200m. Trussed bridges are economical since the members are subjected to direct forces and the open web construction facilitates the use of larger depths with a reduction in the self-weight.