张天歌, 周晅毅, 顾明. 不同护栏透风率下桥面雪飘移的数值模拟[J]. 工程力学, 2023, 40(3): 36-43. DOI: 10.6052/j.issn.1000-4750.2021.09.0733
引用本文: 张天歌, 周晅毅, 顾明. 不同护栏透风率下桥面雪飘移的数值模拟[J]. 工程力学, 2023, 40(3): 36-43. DOI: 10.6052/j.issn.1000-4750.2021.09.0733
ZHANG Tian-ge, ZHOU Xuan-yi, GU Ming. CFD SIMULATION OF SNOW DRIFTING AROUND BRIDGE DECK WITH DIFFERENT BARRIER POROSITIES[J]. Engineering Mechanics, 2023, 40(3): 36-43. DOI: 10.6052/j.issn.1000-4750.2021.09.0733
Citation: ZHANG Tian-ge, ZHOU Xuan-yi, GU Ming. CFD SIMULATION OF SNOW DRIFTING AROUND BRIDGE DECK WITH DIFFERENT BARRIER POROSITIES[J]. Engineering Mechanics, 2023, 40(3): 36-43. DOI: 10.6052/j.issn.1000-4750.2021.09.0733

不同护栏透风率下桥面雪飘移的数值模拟

CFD SIMULATION OF SNOW DRIFTING AROUND BRIDGE DECK WITH DIFFERENT BARRIER POROSITIES

  • 摘要: 采用计算流体动力学(Computational Fluid Dynamics, CFD)方法,对典型桥梁断面上的雪飘移进行了数值模拟,得到桥面上风致积雪的重分布。为验证该文数值模拟方法的正确性,以平屋面风吹雪为案例,将该文数值模拟方法得到的结果与风洞试验结果进行了对比。在桥面雪飘移的数值模拟过程中,考虑了桥梁护栏的影响,对比分析了不同护栏透风率下桥面风致积雪重分布形式。研究发现:当护栏透风率大于50%时,桥面上不会出现显著的积雪沉积;当护栏透风率小于50%时,桥面护栏附近出现了较显著的积雪沉积,且在迎风端护栏的背风侧沉积最大。为减小桥面风致积雪堆积对交通的不利影响,建议在桥梁设计时采用高透风率的护栏。

     

    Abstract: Snow drifting around a typical bridge deck was simulated using computational fluid dynamics (CFD) method to attain the snow redistribution on the bridge deck. To verify the accuracy of the numerical model, snow drifting around a flat roof was firstly simulated. The result of the numerical simulation was compared with that of wind tunnel tests. In the simulation of snow drifting around the bridge deck, the barriers on a bridge deck were considered and snow redistributions on the bridge deck with different barrier porosities were analyzed. It is shown that when the barrier porosity is above 50%, snow could not be accumulated heavily on the bridge deck. When the barrier porosity is below 50%, snowdrift would be accumulated next to the barriers, and snow is accumulated significantly behind the windward barrier. Therefore, to mitigate the effect of wind-induced snow accumulation on a bridge deck on traffic, it is suggested that the barrier with high porosity should be used in the design of the bridge.

     

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