journal article Apr 01, 2022

Response control analysis of a new mega‐subcontrolled structural system (MSCSS) under seismic excitation

Abstract
SummaryThe mega‐subcontrolled structural system (MSCSS) was proposed in the past decade as a new construction technique for high‐rise buildings because it showed an improved structural seismic response. However, research continues to focus on further increasing the response control ability, minimizing the cost, and improving the seismic performance of MSCSS. In this paper, a novel configuration named configuration 13 is proposed that incorporates an inverted V‐bracing (chevron) along the height in the center of the structure, and a mid‐story isolation system is situated under the first mega‐beam. The response control analysis and dynamic characteristics of the novel MSCSS are studied based on the structural responses to seven seismic waves. This novel configuration shows a significant improvement of at least 30.58% in the structural acceleration response with an average overall improvement of 49.7% under an El Centro wave. Moreover, nonlinear dynamic analysis is performed under the same seven waves; the proposed configuration shows the maximum pseudo‐spectral acceleration under the El Centro input at low frequencies, while under the Kobe wave, acceleration peaks also appear at higher frequencies. Furthermore, the Hilbert–Huang transform is also applied, confirming that the proposed MSCSS shows no sudden fluctuations in its structural response under seismic excitation.
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