一类复杂建筑外围装饰结构的风荷载参数研究

发布时间：2018-05-17 19:03

  本文选题：外围装饰结构 + 风荷载　； 参考：《力学季刊》2014年03期

【摘要】：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.
[Abstract]:The complex decoration structure can improve the visual effect of the building further, but the sensitivity of the complex decoration structure to the wind load is often higher than that of the main building, so the safety of the wind resistant design of the building structure is put forward a higher requirement. It is almost impossible to carry out the physical wind tunnel test directly because of the small volume and large quantity of the exterior decoration structure. Therefore, the numerical wind tunnel technique is used to solve the wind load problem of the peripheral decoration structure. Based on the high performance hardware computing platform, the problem of generating high quality mesh in three dimensional space with multiple moving positions of tassel structure is solved by setting a reasonable mesh generation form. The distribution law of body shape coefficient of each layer of tassel under different wind direction angle is simulated numerically, and the extreme distribution of shape coefficient of tassel structure under all wind direction angles is statistically analyzed, and the range of extreme wind parameters of each layer of tassel for design is given. The numerical simulation results show that the extreme region of wind load of tassel structure is located at the corner of the building shape. When the structure is faced with a possible strong wind weather, the stop position of the tassel structure should be avoided by placing the long tassel bar in the above area. In order to improve the wind safety of tassel structure.
【作者单位】： 上海应用技术学院城市建设与安全工程学院;同济大学土木工程防灾国家重点实验室;
【基金】：上海市自然科学基金(13ZR1441100)
【分类号】：TU312.1
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本文编号：1902505