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  Volume 6, Number 1, January 2021 , pages 1-13

Study on failure mechanism of multi-storeyed reinforced concrete framed structures
Irfan Ahmed, Tariq Ahmad Sheikh, P. Gajalakshmi and J. Revathy

    Failure of a Multi-storeyed reinforced concrete framed structure occurs when a primary vertical structural component is isolated or made fragile, due to artificial or natural hazards. Load carried by vertical component (column) is transferred to neighbouring columns in the structure, if the neighbouring column is incompetent of holding the extra load, this leads to the progressive failure of neighbouring members and finally to the failure of partial or whole structure. The collapsing system frequently seeks alternative load path in order to stay alive. One of the imperative features of collapse is that the final damage is not relative to the initial damage. In this paper, the effect on the column and beam adjacent to statically removed vertical element in terms of axial force, shear force and bending moment is investigated. Using Alternate load path method, numerical modelling of two dimensional one bay, two bay with variation in storey heights are analysed with FE model in order to obtain better understanding of failure mechanism of multi-storeyed reinforced concrete framed structure. The results indicate that the corner column is more susceptible to progressive collapse when compared to middle column, using this simplified methodology one can easily predict how the structure can be made to stay alive in case of sudden failure of any horizontal or vertical structural element before designing.
Key Words
    progressive collapse; static linear analysis; multistoried buildings; damage; reinforced concrete framed structure; load distribution
Irfan Ahmed and Tariq Ahmad Sheikh: Department of Civil Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai, India
P. Gajalakshmi and J. Revathy:Department of Civil Engineering, NIT, Srinigar, Jammu and Kashmir, India

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