工程力学 ›› 2018, Vol. 35 ›› Issue (7): 1-6.doi: 10.6052/j.issn.1000-4750.2017.06.ST03

• 综述 •    下一篇

行业标准《屋盖结构风荷载标准》的主要内容

杨庆山1,3, 田玉基2,3, 陈波2,3, 黄国庆1   

  1. 1. 重庆大学土木工程学院, 重庆 400044;
    2. 北京交通大学土木建筑工程学院, 北京 100044;
    3. 结构风工程与城市风环境北京市重点实验室, 北京 100044
  • 收稿日期:2017-06-01 修回日期:2017-12-20 出版日期:2018-07-25 发布日期:2018-07-26
  • 通讯作者: 杨庆山(1968-),男,河北人,教授,博士,主要从事结构风工程研究(E-mail:qshyang@cqu.edu.cn). E-mail:qshyang@cqu.edu.cn
  • 作者简介:田玉基(1967-),男,山东人,教授,博士,主要从事结构风工程研究(E-mail:yujitian@bjtu.edu.n);陈波(1979-),男,湖北人,教授,博士,主要从事结构风工程研究(E-mail:bochen@bjtu.edu.cn);黄国庆(1976-),男,江苏人,教授,博士,主要从事结构风工程研究(E-mail:824656975@qq.com).
  • 基金资助:
    国家自然科学基金项目(51378061);北京市自然科学基金项目(8152023)

MAIN CONTENTS OF THE STANDARD FOR WIND LOADS ON ROOF STRUCTURES

YANG Qing-shan1,3, TIAN Yu-ji2,3, CHEN Bo2,3, HUANG Guo-qing1   

  1. 1. School of Civil Engineering, Chongqing University, Chongqing 400044, China;
    2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;
    3. Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing 100044, China
  • Received:2017-06-01 Revised:2017-12-20 Online:2018-07-25 Published:2018-07-26

摘要: 全面介绍了新编行业规范《屋盖结构风荷载标准》的主要内容。针对多种屋盖主体结构的风振响应计算分析和抗风设计,采用平均风压与脉动风振等效静力风压之和表达主体结构的风压标准值,提出了脉动风荷载作用下结构风振响应极值的单目标、多目标等效静力荷载表达方式;采用多目标等效静力风荷载分析方法,给出了平面桁架、张弦梁、网架、球壳、柱壳、鞍形屋盖和悬挑屋盖的风振等效风压系数图表及体型系数图表。采用围护结构风压系数极值表达围护结构的风压标准值,规定了长/短时距的风压极值估计方法,给出了低矮房屋单坡/双坡类屋盖、四坡屋盖、中高层房屋屋盖、开敞屋盖、悬挑罩蓬的风压系数极值图表。《屋盖结构风荷载标准》引入屋盖主体结构风振等效风压系数和围护结构风压系数极值的概念,完善和发展了我国屋盖结构抗风设计的相关规定。

关键词: 屋盖结构, 抗风设计, 主体结构, 风振等效风压系数, 围护结构, 风压系数极值

Abstract: This paper comprehensively introduces the main contents of the Standard for Wind Loads on Roof Structures. Regarding the wind-induced response analyses and wind-resisting design for main load-resisting structures of roofs, the nominal values of wind loads on the main structures are expressed by the sum of mean wind pressures and equivalent static wind pressures. The equivalent static wind pressures correspond to extreme responses induced by fluctuating wind loads, which can be obtained by the proposed method for single or multiple targets. On these bases, the design figures and tables of shape factors for the mean wind pressures and equivalent pressure factors for fluctuating wind responses considering multiple targets are presented for different types of roof structures. These include plane truss structures, beam string structures, grid truss structures, spherical/cylindrical shell structures, saddle structures and overhanging structures. The extreme wind pressure coefficients are estimated based on specified methods, which are applicable to different cases of short/long wind pressure samples, to consequently determine the nominal values of wind loads on cladding and components. Furthermore, the design figures and tables of corresponding extreme wind pressure coefficients are proposed for mono-slope, gable, hip roofs of low-rise buildings; roofs of middle-/high-rise buildings; open roofs and overhanging canopies. Generally, in the current Standard for Wind Loads on Roof Structures, the Chinese wind-resisting design specifications for roof structures have been improved by introducing the concepts of equivalent pressure factors for the wind-induced fluctuating responses of main load-resisting structures and the extreme wind pressure coefficients of cladding and components.

Key words: roof structures, wind-resisting design, main load-resisting structures, equivalent pressure factors for wind-induced responses, cladding and components, extreme wind pressure coefficients

中图分类号: 

  • TU312.1
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