SEISMIC DISPLACEMENT EVALUATION OF REINFORCED CONCRETE BUILDING BY CYCLIC PUSHOVER ANALYSIS
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Abstract
This research presents the seismic displacement evaluation of reinforced concrete building by Cyclic Pushover Analysis. This method provides a set of applied lateral forces that is close to an earthquake loading. The 4-storey reinforced concrete school building was selected for this research. For the peak roof displacement analysis, four pattern of loading protocols were used as the lateral force applied to the building. The responses were compared with Pushover Analysis and Nonlinear Dynamic Analysis which provided the most accurate results. Ten pairs of ground motions were scaled to match the design spectra of the northern region of Thailand. The results show that the average errors of the peak roof displacement, the peak story displacement, the peak inter-story drift ratio and the damage indices of Cyclic Pushover Analysis were 11.6, 6.1, 16.5 and 34.7% respectively when they were compared with Nonlinear Dynamic Analysis. These results were closer than those of Pushover Analysis because the stiffness degrading consideration in loading protocols were consistent with the earthquake loading. Thus, The results are more reliable than the Pushover Analysis.
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References
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