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Submitted
September 26, 2015
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September 26, 2015
Published
September 26, 2015
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Abstract

Nowadays Post-tensioned simply supported pre-stressed concrete (PC) I-girder bridges are widely used bridge system for short to medium span (20m to40m) highway bridges due to its moderate self-weight, structural efficiency, ease of fabrication, low maintenance etc. In order to compete with steel bridge systems, the design of PC I-girder Bridge system must lead to the most economical use of materials.In this present study, cost optimization approach of a post-tensioned PC I-girder is presented. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials. For a particular girder span and bridge width, the design variables considered for the cost minimization of the bridge system, are top flange width, girder depth, bottom flange thickness, number of cables (i. e. X1, X2, X3,X4 resp.) Design constraints for the optimization are considered according to AASHTO (American Association of State Highway and Transportation Officials) Standard Specifications and IS: 1343-1980. The optimization problem is characterized by having a combination of continuous, discrete and integer sets of design variables. For An optimization purpose Matlab Software with SUMT (Sequential Unconstrained Minimization Technique) is used that is capable of locating directly with high probability the minimum design variables.

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How to Cite
Sawant, D. U. (2015). COST OPTIMIZATION OF POST-TENSIONED I- GIRDER. International Journal of Students’ Research in Technology & Management, 2(1), 14–18. Retrieved from https://mgesjournals.com/ijsrtm/article/view/112
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