Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/5253
Authors: Srivastava, Ishan
Issue Date: 2012
Abstract: The increase in deterioration of bridge infrastructure is a large-scale national problem. Maintaining the existing bridge infrastructure network and adapting it to new capacity requirements has become one of the most challenging tasks for today's engineers. Bridges designed and built only a few years ago are now subjected to traffic loads well above the design ones. At the same time, it has become evident that the durability of bridges is not always guaranteed, even for relatively recent constructions. It is therefore necessary to intervene on the structure with most feasible, economical and efficient methods to upgrade, repair or strengthen the existing bridges while preserving, at least partially, its traffic bearing capacity. Fiber Reinforced Polymer (FRP) composites represent a new and promising solution to the shortcomings of several traditional materials and upgrading techniques and has a great potential to integrate into the bridge infrastructure. This report aims to give an idea about the use of FRP rib core bridge decks in culverts of spans 2 m, 3 m, 4 m and 5m. Two different bridge construction schemes i.e. FRP panel of width 1 m and span 2 m and FRP deck of width 7.5 m and spans 2 m, 3 m, 4 m and 5m are analyzed in this study. A typical rib core configuration is adopted and its design parameters are varied to obtain an optimum design of bridge panel and deck from the range of solutions based upon simple rule of better chromosomes as per genetic algorithm. The ribs are assumed to be oriented in the transverse direction only. A typical representative bridge panel simply supported on two opposite edges, subjected to self weight and imposed live load as per IRC 70R loading for the tracked vehicle is considered. The thicknesses of top and bottom face plates; thickness, depth and number of ribs in the core are considered as the design parameters for the structural optimization. The material properties adopted for different components are treated as invariable. Optimization has been performed by following different criteria based on deflection limit, buckling and failure analysis. Graphical User Interface (GUI) of ABAQUS CAE has been utilized for the parametric modeling in which the PYTHON scripts have been modified. The design parameters are varied to obtain different trial solutions. The optimum dimensions are finalized based on the solutions corresponding to the minimum volume of the FRP material. Keywords: Fiber Reinforced Polymer, Finite Element Method, Bridges, Optimization, Rib core. 1uI
Other Identifiers: M.Tech
Research Supervisor/ Guide: Chakrabarti, Anupam
Bhargava, Pardeep
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' DISSERTATIONS (Civil Engg)

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