PROBABILISTIC EVALUATION OF HORIZONTALLY CURVED ALUMINIUM ALLOY BRIDGE DECKS ON STEEL GIRDERS

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94 Pages 10,879 Words 35 Views PDF Format No. of Chapters: 1 to 5 Chapters

ABSTRACT
The Probabilistic evaluation of horizontally curved aluminium alloy bridge decks on steel I-Girders using AASHTO (2010) specification is presented.The analysis was carried out using ABAQUS and the First Order Reliability Method (FORM). Structural behavior of the horizontally curved aluminium alloy decks on steel girders were studied under varying loadings while varying their geometrical properties. The result of finite element analysis carried out on the horizontally curved deck shows that a minimum thickness of stiffener of is ideal for the safety of the horizontally curved deck. The Von Mises stress was within acceptable limits i.e. which is the yield strength of the Aluminum deck.Hence, it is shown that the proprietary Alumadeck can be used in a region of curved alignment up to an angle of . It is shown that the proprietary Alumadeck system is in conformity with the Load Resistance Factor Design (LRFD) Specification (2004) which stipulates that the target value of reliability index is 3.5 for resistance factor of 1.0 (Assuming 80% composite action compression flange).The result of the composite action between the deck and the girder for RF of 1.0 for full composite action (Considering failure of the bottom flange) shows a safety index within acceptable limit which shows that the Alumadeck can withstand the live load it is subjected to considering the HL 93 loading condition. Also the minimum composite action for safety is 40% corresponding to a safety index of 1.16. An I girder of depth , flange thicknesses of , flange width and web thickness of is safe to carry the applied loading i.e. truck load and selfweight.

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