Numerical Investigation of Wind Load on Long Span Hollow Grid Roof
[1]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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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42
Number of periods:
2021 03
Page number:
93-
Column:
Public date:
2021-05-10
- Title:
- Numerical Investigation of Wind Load on Long Span Hollow Grid Roof
- Keywords:
- long span roof; hollow grid structure; wind load; computational fluid dynamics; numerical simulation
- CLC:
- -
- 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.
- References:
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Last Update:
2021-06-24