轨道梁初始几何缺陷对活动屋盖运行的影响  

The Influence of Initial Geometric Imperfections of Track Beams on the Operation of Movable Roofs

作　　者：徐光明 汪凯超 王必刚 冯龙[3] 查晓雄 XU Guangming;WANG Kaichao;WANG Bigang;FENG Long;ZHA Xiaoxiong(Shenzhen Sports Center Operation Management Co.,Ltd.,Shenzhen 518031,China;Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen,Shenzhen 518055,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200112,China)

机构地区：[1]深圳市体育中心运营管理有限公司,广东深圳518031 [2]哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055 [3]中国建筑第八工程局有限公司,上海200112

出　　处：《建筑钢结构进展》2025年第3期84-92,共9页Progress in Steel Building Structures

基　　金：国家自然科学基金(52178129);深圳市科技计划项目(GJHZ20220913143007013、KCXST20221021111408021)。

摘　　要：为探究轨道梁的初始几何缺陷是否会影响轨道梁结构的安全性和是否会加剧台车的卡轨风险,基于有限元瞬态分析提出一种活动屋盖闭合全过程模拟的简化方法,并利用该方法探究了活动屋盖闭合过程中轨道梁位移和应力的变化特征,研究了轨道梁的缺陷类型(z向和y向初始几何缺陷)和缺陷尺寸对活动屋盖运行的影响。结果表明,在活动屋盖闭合过程中,台车与轨道梁间的y向位移存在一定的差值,该位移差可达3.8 mm以上,且越靠近固定屋盖跨中该位移差越大;不同缺陷类型和缺陷尺寸下,轨道梁应力比的峰值基本相同,且应力比小于0.54;z向初始几何缺陷基本不影响轨道梁的位移;y向初始几何缺陷会使轨道梁产生一个与缺陷同向的附加位移,且缺陷越大附加位移值越大,当轨道梁的y向初始几何缺陷尺寸为轨道梁的跨度的1/250时,台车的最大横移率是无缺陷模型最大横移率的4.3倍。A simplified method is proposed to simulate the complete closure process of the movable roof in a finite element transient analysis.The purpose is to investigate the impact of initial geometric imperfections in the track beam on the safety of the structure and the risk of track jamming of the trolley.This method examines the displacement and stress variation characteristics of the track beam during the closure of the movable roof,and also explores the influence of different types(initial geometric imperfections in z and y directions)and sizes of track beam imperfections on the operation of the movable roof.The results reveal that there is a displacement difference greater than 3.8 mm in the y-direction between the trolley and the track beam during the closure process,and this difference increases as the closure progresses towards the mid-span position.The stress ratio peak value of the track beam is consistent and remains below 0.54,irrespective of the imperfection type and size.The initial geometric imperfections in the z direction have almost no effect on the track beam displacement.Conversely,the initial geometric imperfections in the y direction result in additional displacement in the same direction as the imperfection,and the magnitude of this additional displacement increases with the imperfection size.When the size of the initial geometric imperfection in the y direction is L/250,the maximum lateral displacement ratio of the trolley is 4.3 times higher than that of the ideal model.

关 键 词：开合屋盖 钢结构 轨道梁 初始几何缺陷 有限元瞬态分析 台车横移率 

分 类 号：TU391[建筑科学—结构工程]