太原理工大学学报2026，Vol.57Issue(5)：937-946,10.DOI:10.16355/j.tyut.1007-9432.20240656
基于人致振动的悬挑钢结构旋转楼梯舒适度研究
Comfort Study of Cantilevered Steel Structure Spiral Staircase Based on Human-induced Vibration
摘要
Abstract
[Purposes]The structural characteristics of cantilevered steel spiral staircases make them sensitive to human-induced vibrations,which may lead to comfort issues and thus necessitate comfort research.[Methods]A cantilevered spiral staircase at the Xiaohe International Convention and Exhibition Center in Shanxi was selected as the subject of study,and on-site human-induced vi‑bration tests were conducted.Through the acceleration response of the structure,the amplitude char‑acteristics of the stair vibration response with different crowd excitations were obtained,and the im‑pact of crowd step frequency and density on stair vibration was analyzed.The natural frequencies of the structure were identified by using analytical modal decomposition and stochastic reduction tech‑niques,and comfort evaluations were conducted with three indicators:peak acceleration,root mean square(RMS)acceleration,and equivalent static peak acceleration.[Results]The results indicate that when crowds descend and concentrate on the outer side of the stairs,they cause significant vibra‑tion responses.The level of stair vibration response increases with the crowd step frequency,and it significantly increases with loading time when the crowd step frequency approaches the natural fre‑quency of the stairs.The first three natural frequencies of the structure are identified as 3.34,5.77,and 10.63 Hz.Comparing the measured natural frequencies and acceleration indicators with the regula‑tory limits shows that the staircase meets the comfort requirements.关键词
悬挑钢结构/旋转楼梯/人致振动/舒适度/动力特性Key words
cantilevered steel structure/spiral staircase/human-induced vibration/comfort level/dynamic characteristics分类
建筑与水利引用本文复制引用
刘鹏基,安毅,程欣,郑礼刚,杨乐,李海旺..基于人致振动的悬挑钢结构旋转楼梯舒适度研究[J].太原理工大学学报,2026,57(5):937-946,10.基金项目
国家自然科学基金面上项目(51978437) （51978437）
