AN OPTIMIZATION OF GIRDER BRIDGES TO CONDENSE THE OVERALL COSTS

Girder bridges are broadly used bridge system for brief to medium span (20m to 50m) highway bridges because of its moderate self weight, structural efficiency, easy fabrication, low maintenance etc. To be able to contend with steel bridge systems, the style of I-girder Bridge system must result in the most cost effective utilization of materials. Within this paper, cost optimization approach of the publish-tensioned PC I-girder bridge product is presented. The aim would be to minimize the all inclusive costs within the design procedure for the bridge system thinking about the price of materials, fabrication and installation. For the girder span and bridge width, the look variables considered for that cost minimization from the bridge system, are girder spacing, various mix sectional size of the girder, quantity of strands per tendon, quantity of tendons, tendons configuration, slab thickness and ordinary reinforcement for deck slab and girder. Design constraints for that optimization are thought based on AASHTO Standard Specifications. The optimization issue is characterized by getting a mix of continuous, discrete and integer teams of design variables and multiple local minima. An optimization formula known as Transformative Operation (EVOP) can be used, that is capable of doing locating directly rich in probability the worldwide minimum. The suggested cost optimization approach is in contrast to a current project which results in a substantial cost saving while leading to achievable design