Wind-resistant fuzzy comfortability assessment for a super-high tower crane based on the PDEM

Abstract

The fuzzy comfortability of a wind-sensitive super-high tower crane is critical to guarantee occupant health and improve construction efficiency. Therefore, the wind-resistant fuzzy comfortability of a super-high tower crane in the Ma’anshan Yangtze River (MYR) Bridge site is analyzed in this paper. First, the membership function model that represents fuzzy comfortability is introduced in the probability density evolution method (PDEM). Second, based on Fechner’s law, the membership function curves are constructed according to three acceleration thresholds in ISO 2631. Then, the fuzzy comfortability for the super-high tower crane under stochastic wind loads is assessed on the basis of different cut-set levels λ. Results show that the comfortability is over 0.9 under the required maximum operating wind velocity. The low sensitivity to λ can be observed in the reliability curves of ISO Ⅱ and Ⅲ membership functions. The reliability of the ISO Ⅰ membership function is not sensitive to λ when λ < 0.7, whereas it becomes sensitive to λ when λ > 0.7.