[1]郑德乾,刘帅永,顾明,等.大跨镂空网格屋盖风荷载数值模拟研究[J].郑州大学学报(工学版),2021,42(03):93.[doi:10.13705/j.issn.1671-6833.2021.03.016]
　Zheng Digan,Liu Shuaiyong,Gu Ming,et al.Numerical Investigation of Wind Load on Long Span Hollow Grid Roof[J].Journal of Zhengzhou University (Engineering Science),2021,42(03):93.[doi:10.13705/j.issn.1671-6833.2021.03.016]
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大跨镂空网格屋盖风荷载数值模拟研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42卷
期数:
2021年03期
页码:
93
栏目:
出版日期:
2021-05-10

文章信息/Info

Title:
Numerical Investigation of Wind Load on Long Span Hollow Grid Roof
作者:
郑德乾;  刘帅永;  顾明;  全涌;  潘钧俊 ;  周健
河南工业大学土木工程学院;同济大学土木工程防灾国家重点实验室;中国建筑第八工程局有限公司;华建集团华东建筑设计研究总院;

Author(s):
Zheng Digan; Liu Shuaiyong; Gu Ming; Quan Yong; Pan Junjun; Zhou Jian;
School of Civil Engineering, Henan University of Technology; National Key Laboratory of Civil Engineering Disaster Prevention of Tongji University; China Construction Eighth Engineering Bureau Co., Ltd.; Huajian Group East China Construction and Research Institute;
关键词:
Keywords:
long span roof;  hollow grid structure;  wind load;  computational fluid dynamics;  numerical simulation
DOI:
10.13705/j.issn.1671-6833.2021.03.016
文献标志码:
A
摘要:
采用CFD数值模拟方法对大跨空间镂空网格屋盖结构风荷载进行了研究。首先,通过屋盖节段模型的风洞天平测力试验和数值模拟的对比,验证了数值模拟方法及结果的有效性:然后,着重对比分析了光伏板布置和底部建筑对屋盖风荷载的影响,并结合屋盖周围流场进行了影响分析:最后,给出了屋盖结构的整体风荷载和风压分布,并与屋盖原方案结果进行了对比。结果表明:CFD数值模拟方法可较好地应用于预测大跨镂空网格屋盖结构的平均风荷载。屋盖结构整体以水平风荷载为主:竖向风荷载主要为向上的风吸力,有利于结构的整体受力:屋盖表面存在较明显的局部风压不均匀现象,特别是下表面存在较大范围的局部风吸力,这些位置可能会引起光伏板的局部破坏:相对于光伏板布置,底部建筑对屋盖整体和局部风荷载均有显著影响,不仅增加了屋盖整体的竖向风吸力,而且也增大了屋盖下表面局部位置的风吸力。
Abstract:
Wind load of the long span roof was numerically investigated by adopting CFD simulation method. The present numerical method was firstly verified by comparing the simulated base force of the section roof model with the force balance wind tunnel experimental data. Effects of the PV panel density and the supporting buildings on the wind load distribution on the roof were then investigated. The wind load distribution mechanism was analyzed based on the simulated flow field. Finally , the base force and the wind pressure distribution on the whole roof were presented and compared with those of the old scheme roof. The CFD simulation method was verified to be capable in predicting the mean wind load on the long span hollow grid roof structure. Wind effect on the roof was dominated by the horizontal wind load. The vertical wind load was mainly wind suction which was favorable for the structure. Inhomogeneous distribution of local wind suction was observed on the roof ，especially at the bottom surface of the roof. Large wind suction was easy to cause local wind-induced damage in those zones. In comparison with the PV panel density , the supporting buildings could have more remarkable influence on both the base wind forces and local wind pressure distribution on the roof structure .The existence of the supporting buildings could not only increase the vertical wind suction on the whole roof body, but also could enlarge the local wind suction on some part of the bottom of the roof.

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更新日期/Last Update: 2021-06-24