大跨度双曲混凝土双曲组合扭壳屋盖表面风压系数试验研究

摘要

Long-span reinforced concrete roof of hyperbolic paraboloidal combined torsion shell have the characteristics of lighweight, flexibility, low-damping and so on. We must take wind-load as controlled load in structure design. Because of requirement of architecture style, long-span reinforced concrete roof often has complicated figure. To determine wind-pressure distribution of its surface is not by the current load standard,but wind-tunnel test. This paper is about new type long-span reinforced concrete roof of hyperbolic paraboloidal combined torsion shell structures based on the wind-tunnel test results, which illustrate the necessity of wind-tunnel test on long-span roof. And get the complicated characteristics of wind pressure distribution, which provides essential reference for structure design.%大跨度双曲混凝土组合扭壳屋盖结构具有质量轻、柔性大、阻尼小等特点,风荷载是其结构设计的控制荷载.由于建筑造型的要求,大跨度双曲混凝土屋盖结构往往具有复杂的外型,现行的荷载规范很难确定屋盖表面的风压分布,一般是通过风洞测压试验获得屋盖表面的风压.本文较为详细地介绍了具体试验方法和理论分析方法,并通过对大跨度双曲混凝土组合扭壳屋盖表面风压系数的测定和风洞试验结果的分析,说明了利用风洞试验测量其表面风荷载的必要性,得到其风压分布的复杂特征,为大跨度混凝土屋盖的结构设计提供参考.