Comparison of high speed railway bridge substructures

Hussein Yousif Aziz and Abbass A. Abd-Noor

African Journal of Engineering Research
Published: June 22 2016
Volume 4, Issue 2
Pages 36-42

Abstract

This paper studies an analysis and design of substructural bridge by using AASHTO code, in comparison with another engineering program, SAP 2000 software program, and the results obtained from the determination of the moment and shear using both methods. The difference in calculating moment in the two methods showed SAP program 30% more than AASHTO code. While in calculating of shear using both methods, it was observed that the difference was lesser, about 0.5%, so the design in the SAP program has no assurance of the outcome of the moment compared with the determination of the shear. The reason for the difference in these results is that SAP program relies on finite element theory which depends on dividing model into mini elements and this gives more accurate and greater results than AASHTO code; because AASHTO code calculates the data for whole member without dividing it into mini parts.

Keywords: Bridge, substructures, AASHTO code, SAP 2000 software program.

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