dense array
در نشریات گروه عمران-
The effect of earthquake rotational component (torsional and rocking ones) on the structures,has attracted the attention of many researchers in recent years. The impact of the rocking and torsionalcomponents of the ground motion, particularly on high-rise and height-wise irregular structures, is significant. Inthis paper, the rotational components of earthquake record were computed employing the acceleration gradientmethod, using the data obtained from a dense accelerometer array, and the behavior of the cooling towers underthe influence of these rotational components was investigated. To this end, three distinct loading combinationswere applied to the tower, and the results were examined and compared. The loading combinations include1) three translational components of earthquake record, 2) applying rotational and translational componentsof the earthquake simultaneously, and 3) applying translational and rocking components concurrently. Theresponse of the tower under the two latter loading combinations was compared with that of the first one. Theresults indicate that in the case of simultaneous action of translational and rocking components, displacementsand support reactions, on average, increase by 5% in comparison with the case of applying solely translationalcomponent. Furthermore, including the torsional component, in addition to the rocking one, leads to a rise ofnearly 6% in the displacements and supports reaction in comparison with the first loading combination results.
Keywords: Rocking Motion, Chiba Array, Dense Array, Torsional Motion, Cooling Tower
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