某大跨度带天窗双层网架结构风压分布研究  

Research on Wind Pressure Distribution of a Large⁃Span Double Layer Grid Structure with Skylight

作　　者：郭绩超 王孟鸿 刘迪 GUO Jichao;WANG Menghong;LIU Di(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044;Ruike Tongchuang Electric Power Engineering Design Co.,Ltd,Beijing 100123)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]瑞科同创电力工程设计有限公司,北京100123

出　　处：《北京建筑大学学报》2024年第4期97-103,共7页Journal of Beijing University of Civil Engineering and Architecture

基　　金：国家自然科学基金项目(51578038)。

摘　　要：大跨结构杆件众多,形状较为复杂,而在我国规范中并没有涵盖所有复杂结构设计的相关参数,常导致结构设计时缺少参考依据,因此对大跨空间结构进行抗风设计的研究是很有必要的。以实际工程为背景,采用相对成本更低、效率更高的数值模拟(CFD)方法,对带有天窗的大跨网架结构进行风压研究。以网架结构辅助设计软件STADS与Fluent接口开发程序为基础,完成对带有天窗的网架结构的分区模型建立、数值风场计算域的生成以及计算结果的输出,极大提高了计算效率,最后通过对比分析总结了相应结构的风压分布规律;通过对结构天窗开闭合2种情况下的风压分布对比分析,发现2种结构形式总体风压分布规律一致,局部会有不同,结构开窗能有效降低总体风压值并减小结构所受的风吸力,但会对结构底部压力增大,使结构支座反力增加,为大跨度带天窗类网架结构的设计和施工提供了有利参考。Due to the numerous members and complex shapes of large⁃span structures,which are not covered by all the relevant parameters for complex structural design in Chinese regulations,there is often a lack of reference basis in structural design.Therefore,it is necessary to study the wind resistance design of large⁃span spatial structures.Based on the practicle engineering,the numerical simulation(CFD)method with lower cost and higher efficiency is used to study the wind pressure of the large⁃span grid structure with skylight.Based on the the grid structure aided design software STADS and Fluent interface development program,the partition model of the grid structure with skylight is established,the numerical wind field calculation domain is generated and the calculation results are output,which greatly improves the calculation efficiency.Finally the wind pressure distribution law of the corresponding structure is summarized through comparative analysis.Through the comparative analysis of the wind pressure distribution in the two cases of structural skylight opening and closing,it is found that the overall wind pressure distribution law of the two structural forms is consistent,but there are local differences,and the structural fenestration can effectively reduce the overall wind pressure value and reduce the wind suction force of the structure,but it will increase the pressure at the bottom of the structure and increase the reaction force of the structural support.It provides a favorable reference for the design and construction of large⁃span skylight grid structure.

关 键 词：筒壳网架结构 风压分布 多风向角 风场模拟 

分 类 号：TU312[建筑科学—结构工程]