体育场馆膜建筑平均风压数值模拟及验证分析  

Mean Wind Pressure Simulation and Validation of Stadium Membrane Building

作　　者：张慎[1] 王义凡 程明 尹鹏飞 ZHANG Shen;WANG Yi-fan;CHENG Ming;YIN Peng-fei(Central South Architectural Design Institute, Wuhan 430071, China)

机构地区：[1]中南建筑设计院股份有限公司,武汉430071

出　　处：《科学技术与工程》2022年第14期5768-5777,共10页Science Technology and Engineering

基　　金：住房和城乡建设部科学技术计划(2021-K-020)。

摘　　要：为评估沿海某体育场大跨张拉膜建筑的外形合理性,将参数化建筑设计与开源计算流体力学方法结合,开发了针对稳态大气边界层建筑数值风洞的批量计算模块,能够自动建立考虑周围建筑和地形的计算网格模型,快速评估复杂膜建筑的平均风压分布规律。定量分析了底部看台、周围地形和建筑群对膜表面净风压分布规律的干扰以及不同张拉膜形体参数对建筑风荷载影响。结果表明:膜表面平均风压数值计算结果与风洞试验吻合一致;体育场馆底部观众看台会改变膜表面净风压整体分布规律,明显增加负风压;通过局部调整张拉膜形体参数,可以大幅度减少局部风压最大值和整体风荷载。研究结果可为类似膜建筑外形设计提供参考,建议在评估膜外形方案合理性时考虑底部看台和周围建筑影响,采用风洞试验和计算流体力学方法确定风荷载。In order to evaluate the shape rationality of the long-span tensile membrane building of coastal stadium,the parametric architectural design and the open-source computational fluid dynamics method were combined,and a fast batch simulation module for the numerical wind tunnel of the steady-state atmospheric boundary layer building was developed.The developed module can automatically establish a computational model that considers the surrounding buildings and terrain and quickly evaluate the mean wind pressure distribution of complex membrane building.The interference of the bottom stand,surrounding terrain and buildings on the net wind pressure distribution of the membrane surface and the influence of different shape parameters of tensile membrane on the wind load of the building were quantitatively analyzed.The results show that the simulated results of mean wind pressure on the membrane surface are consistent with the wind tunnel test.The audience stands at stadium bottom will change the net wind pressure distribution on the membrane surface and significantly increase the negative wind pressure.By locally adjusting the shape parameters of tensile membrane,the maximum wind pressure coefficient and the overall wind load can be significantly reduced.The results can provide a reference for the design of similar membrane shapes.It is recommended that the influence of surrounding buildings should be considered when evaluating the rationality of the membrane shape scheme,and wind tunnel tests and computational fluid dynamics methods are advised to determine the wind load.

关 键 词：大跨体育场膜建筑 平均净风压 计算流体力学模拟 风洞试验 看台干扰 形体参数调整 

分 类 号：TU399[建筑科学—结构工程] TU245.2