Seismic analysis of structures: connected structures with viscous dampers

Giannakou, Michalis (2013) Seismic analysis of structures: connected structures with viscous dampers. MEng dissertation, University of Portsmouth.

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    Three dimensional Static and Dynamic analyses were performed by utilising LUSAS 14.6 FEA package with the main aim to study the structural and dynamic behaviour of a special type of structure like the connected structures. Connected structures, which are composed by two or high-rise towers with the main connected part to be over than fifty metres long in a certain height, are considered by many investigators as special types of building. The excessive dynamic behaviour of the tallest slender tower produces large volumes of shear stresses to the rest parts of the structure. The usage of viscous dampers at the connected body, as many scholars suggest, can improve the excessive dynamic behaviour of the connected part of the structure by reducing the values of maximum shear stresses at 90%.
    Despite the the fact that energy dissipation devices, such as viscous dampers, can cause reduction of shear forces about 90% at the connected body, the problem of high values of stresses remain unsolved at the weak parts of the structure. Consequently, the suggested numbers and placement of the installed dampers at the connected structure, which is considered to be a complex multi degree of system, is changed radically, in order to overcome the excessive dynamic behaviour of connected structures.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Jane Polwin
    Date Deposited: 11 Feb 2014 14:26
    Last Modified: 28 Jan 2015 12:33

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