Abstract
In wind-resistant design and structural health monitoring scopes of high-rise buildings, significant effort has been dedicated to wind-induced performance assessment and dynamic properties estimation of skyscrapers under typhoon conditions. However, the corresponding indicators in most existing standards were derived from findings on multi-story structures, which causes giant uncertainty and limitations while applying to high-rise buildings. Hence, full-scale field research of high-rise buildings, especially under extreme conditions, is of great significance for complementation and improvement. Taking a precious opportunity of strong typhoon IN-FA sweeping the 600m+ Shanghai Tower, this paper investigates field research on wind-induced vibration evaluation and dynamic properties estimation. An alternative strategy to existing code provisions for vibration assessment is proposed with its derivation and mechanism elaborated. Moreover, amplitude-dependent dynamic properties are identified through field observations. Detailed comparisons on fitting parameters of modal properties between different typhoons are also investigated, presenting valuable information for dynamic parameters stipulated in design specifications and underlying mechanism extraction between dynamic properties and vibration response. Targeting a super skyscraper under strong typhoon conditions, this study conducts full-scale field research in a data-model dual-driven way, which is one of few attempts in wind-induced response assessment of high-rise buildings during the service stage.