Planning and Design of Long Span Bridges

Abstract

<p>The Planning and Design of Bridges is part art and part compromise which is most significant of aspect of Structural Engineering . It demonstrates the creative capability , imagination, innovation and exploration of the Designer .Bridge design is a Complex Engineering problem.</p><p>In India, past two decades have seen unprecedented growth of knowledge in the field concrete bridges, development of new structural forms, new methods of computer-based analysis and design and development of high strength materials. A new code IRC:112-2011 based on Limit State Method has been issued which will be very useful for design of long span bridges.</p><p>Based on Case Study it is concluded that by using Limit State Method , total length of the bridge ( keeping same section/depth of superstructure)could be increased by 22% as compared to working stress/allowable stress(WL/AS) method. Alternately section /depths of the superstructure could be reduced by retaining the same spans arrangement as compared to working stress/allowable stress(WL/AS) method.</p>