一类复杂建筑外围装饰结构的风荷载参数研究

Wind Load Parameters Research about Class of Complex Peripheral Decorative Structure

在建筑外围布置复杂装饰结构能够进一步提高建筑的视觉效果,但复杂装饰结构对风荷载的敏感性往往要超过主体建筑,因此对建筑结构的抗风设计安全性提出了更高的要求.建筑外围装饰结构由于其体量小数量大而导致直接进行物理风洞试验变得几乎不可能,因此本文研究利用数值风洞技术来解决外围装饰结构的风荷载问题.结合高性能的硬件计算平台,通过设置合理的网格剖分形式,解决了流苏结构多个移动位置下的三维空间高质量网格的生成难题.数值模拟了各层流苏在不同风向角下的风荷载体型系数分布规律,并统计分析了所有风向角下流苏结构体型系数极值分布,给出了设计所需的各层流苏极值风参数取值范围.数值模拟结果显示出了流苏结构风荷载的极值区域位于建筑外形的拐角区域,当结构面临可能的大风天气时,流苏结构的停止位置宜避免将长条的流苏杆件置于上述区域,以提高流苏结构的抗风安全性.

Complex arrangement of decorative building envelope structure can further enhance the visual effects architecture, but the peripheral decorative structure is more sensitivity on wind load than the main building, therefore, the safety of wind-resistant design of building structures requires higher requirements. Due to the peripheral decorative structure is small and large number, the physically wind tunnel test has become almost impossible. Therefore, this study was used numerical wind tunnel technology to solve the problem of peripheral decorative structure＇s wind loads. Combined with the high-performance hardware computing platform and a reasonable mesh form, the fringed three-dimensional quality mesh generation problem was solved on some mobile location. Numerical simulation of fringed layers＇ wind load shape coefficient under different wind angles, and the statistical analysis of the tassel shape coefficient extreme value distribution, the extreme wind load shape coefficient of tassels design parameters were given of all layers. Simulation results show that the tassel＇s extreme wind load is located at the comer of the architectural appearance. When faced with a possible windy weather, the location of the long tassels was advised to avoid the above area, in order to improve the safety of tassels.