Abstract
ABSTRACT The outrigger system is a current alternative to reduce the dynamic response of high-rise buildings. The aim of the study is to develop analytical methods for earthquake response of a conventional outrigger system and to determine the optimal outrigger location. First, a theoretical simplified model is developed based on a dynamic time-history load and is further improved by mode-superposition response spectrum method. The model is then calibrated via an ANSYS model, and the simplified model is applied to perform parametric analyses to acquire the optimal outrigger location of each scheme. Subsequently, all data obtained from parametric analyses are summarized to solve the fitting equation of optimal outrigger location. Finally, a comparison of the results between time-history and spectra analysis suggests that the spectrum analysis-based simplified model effectively simulates the seismic behavior of structure with an outrigger and its corresponding fitting equation reasonably expresses the optimal outrigger location of the aforementioned type of structure under seismic action.
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