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

基于概率密度演化理论的超高塔吊风振模糊舒适度分析

作　　者：LIU Yun WANG Hao LI Bing XU Zidong MAO Jianxiao 刘芸;王浩;李冰;徐梓栋;茅建校(东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189;宁安铁路公司,芜湖241000)

机构地区：[1]Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 211189,China [2]Ningan Railway Company,Wuhu 241000,China

出　　处：《Journal of Southeast University(English Edition)》2025年第1期51-57,共7页东南大学学报(英文版)

基　　金：The National Natural Science Foundation of China(No.52108274,52208481,52338011);State Scholarship Fund of China Scholarship Council(No.202306090285).

摘　　要：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 levelsλ.Results show that the comfortability is over 0.9 under the required maximum operating wind velocity.The low sensitivity toλcan be observed in the reliability curves of ISOⅡandⅢmembership functions.The reliability of the ISOⅠmembership function is not sensitive toλwhenλ<0.7,whereas it becomes sensitive toλwhenλ>0.7.为保障施工人员健康和提高施工效率,需要对超高塔吊的施工舒适性能进行精细评估。因此,本文以马鞍山公铁长江大桥为工程背景,通过将隶属度函数引入概率密度演化理论中,建立了超高塔吊风振模糊舒适度评估方法。基于Fechner定律,给出了ISO2631中3类不同加速度限值下的隶属度函数曲线。在此基础上,通过λ-截集技术实现了超高塔吊的风振模糊舒适度评估。结果表明,在规范允许最大施工风速下,超高塔吊的模糊舒适度大于0.9,满足施工舒适度要求。基于ISOⅡ和ISOⅢ隶属度函数的舒适度对λ的敏感性较弱。基于ISOⅠ隶属度函数的舒适度在λ<0.7时对λ的敏感性较低,而在λ>0.7时对λ的敏感性显著增加。

关 键 词：comfort reliability probability density evolution method fuzzy theory membership function tower crane long-span bridge 

分 类 号：TU399[建筑科学—结构工程]