轻钢建筑屋面板连接件破坏临界风速计算方法研究  

Research on Calculation Methods for Critical Wind Velocity of Lightweight Steel Buildings Roof Panel Connectors Failure

作　　者：陈桂龙 孙新宇 CHEN Guilong;SUN Xinyu(Southwest Jiaotong University,Chengdu 610031,China;China State Railway Group Corporation,Beijing 100844,China)

机构地区：[1]西南交通大学,成都610031 [2]中国国家铁路集团有限公司,北京100844

出　　处：《高速铁路技术》2025年第2期57-61,共5页High Speed Railway Technology

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2020T004)。

摘　　要：随着我国高速铁路网的快速发展,铁路沿线轻钢建筑围护结构彩钢板在大风天气下频繁脱落,严重威胁高速铁路运营安全。本文针对自攻螺钉连接件的风致破坏问题,提出一种融合静、动态风压特性的临界风速计算方法。通过理论推导,建立风压-承载力映射模型,引入动态修正系数β量化台风脉动效应,揭示了螺钉直径d、板厚t与支座间距s对临界风速的非线性影响。结果表明,d从4.8 mm增至5.5 mm可提升风速18.3%,t从0.8 mm增至1.0 mm风速提升22.1%,而s从1.5 m增至2.0 m则风速降低34.7%。结合工程验证,提出区域性设计指南,如台风区采用S12.8级螺钉(d≥6.0 mm)、Q550级钢板(t≥1.2 mm)及加密支座间距(s≤1.2 m),使临界风速提升至47.8 m/s(14级台风)。该方法突破传统静态模型局限,为高速铁路沿线轻钢建筑抗风设计与安全评估提供理论支撑。With the rapid expansion of China’s high-speed railway network,the frequent detachment of color steel plate from light steel building envelope systems along railway corridors under high-wind conditions has posed severe threats to operational safety.This paper addressed the wind-induced failure mechanisms of self-tapping screw connections and proposed a critical wind velocity calculation method integrating static and dynamic wind pressure characteristics.A wind pressure-bearing capacity mapping model was established through theoretical derivation,incorporating a dynamic amplification factorβto quantify typhoon-induced pulsation effects.The nonlinear effects of screw diameter d,sheathing thickness t,and support spacing s on critical wind velocity were elucidated.Results demonstrate that increasing d from 4.8 mm to 5.5 mm elevates wind resistance by 18.3%,while enhancing t from 0.8 mm to 1.0 mm yields a 22.1%improvement.Conversely,expanding s from 1.5 m to 2.0 m reduces critical wind velocity by 34.7%.Validated through engineering case studies,regional design guidelines were formulated,recommending S12.8-grade screws(d≥6.0 mm),Q550-grade steel plate(t≥1.2 mm),and reduced support spacing(s≤1.2 m)in typhoon-prone zones,achieving a critical wind velocity of 47.8 m/s(Category 14 typhoon).This methodology overcomes limitations of conventional static models,providing theoretical foundations for wind-resistant design and safety assessment of light steel structures along high-speed railways.

关 键 词：自攻螺钉连接 临界风速计算 动态修正系数 抗风设计优化 

分 类 号：TU392.5[建筑科学—结构工程]