装配式单柱雨棚在极端雪荷载及地震作用下的力学性能  

Mechanical Properties of Prefabricated Single-Column Canopy Structures Under Extreme Snow Loads and Earthquakes

作　　者：王文剑 WANG Wenjian(China Railway Construction Group Co.Ltd.,Beijing 100040,China)

机构地区：[1]中铁建设集团有限公司,北京100040

出　　处：《铁道建筑技术》2025年第1期54-58,77,共6页Railway Construction Technology

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

摘　　要：在严寒地区,装配式雨棚可能遭遇极端雪荷载、地震作用等灾害,其结构在两者单独或者耦合作用下工作机理复杂。本文以我国纬度最高的高铁站伊春站项目为依托,建立装配式单柱雨棚结构的三维有限元模型,对单柱雨棚结构在极端雪荷载单独作用下的性能开展研究,分析了4种不同的雪荷载分布形式对结构性能的影响;分别将满跨分布极端雪荷载与多遇地震、罕遇地震作用进行耦合,研究雨棚结构在耦合作用下的结构性能。研究结果表明:在极端雪荷载和地震耦合作用下,雨棚柱X向最大位移随柱子位置改变而改变,中部柱子位移最大,边缘柱子位移最小。相对仅有极端雪荷载作用时,螺栓、雨棚板、梁柱部件的最大应力分别增加了52%、99%、108%,增长幅度较大,地震作用的影响明显。In severe cold areas,prefabricated canopy structures may encounter disasters such as extreme snow loads and earthquake effects.The working mechanism of the prefabricated canopy structure under the separate or coupled action of the two is complex.This paper,based on the Yichun High-Speed Railway Station project,the northernmost high-speed railway station in China,establishes a three-dimensional finite element model of a prefabricated single-column canopy structure.The study investigated the performance of the canopy structure under the action of extreme snow loads alone,and analyzed the impact of four different snow load distribution patterns on structural performance.The full-span extreme snow load was coupled with frequent earthquakes and rare earthquakes separately to study the structural performance of canopy structures under coupling effects.The research findings reveal that under the coupling effects of extreme snow loads and seismic forces,the maximum displacement in the X direction of the canopy columns varies with column position,with the maximum displacement occurring in the middle columns and the minimum displacement in the edge columns.Compared to the condition with only extreme snow loads,the maximum stress in bolts,canopy panels,and beam-column components increased by 52%,99%,and 108%,respectively,indicating a significant impact of seismic activity.

关 键 词：高铁站雨棚 极端雪荷载 地震作用 有限元 寒区 

分 类 号：TU398[建筑科学—结构工程] U291.6[交通运输工程—交通运输规划与管理]