SEISMIC ANALYSIS OF ELEVATED METRO BRIDGE DOUBLE DECKER PIER

CIVIL ENGINEERING

A metro system is a railway transport system in an urban area with a high capacity, frequency and the grade separation from other traffic. Metro System is used in cities, agglomerations, and metropolitan areas to transport large numbers of people. An elevated metro system is more preferred type of metro system due to ease of construction and also it makes urban areas more accessible without any construction difficulty. An elevated metro system has two major elements pier and girder. The present study focuses on two major elements, Double Decker pier, of an elevated metro structural system. Which is located to ShyamNager metro station in Mumbai, Conventionally the Double Decker pier of a metro bridge is designed using a force based approach? During a seismic loading, the behavior of a Double Decker pier elevated bridge relies mostly on the ductility and the displacement capacity. It is important to check the ductility of such single piers. Force based methods do not explicitly check the displacement capacity during the design. The codes are now moving towards a performance-based (displacement-based) design approach, which consider the design as per the target performances at the design stage. Performance of a pier designed by a Direct Displacement Based Design is compared with that of a force-based designed one. The design of the pier is done by both force based seismic design method and direct displacement based seismic design method in the first part of the study.

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