梁柱凹凸布置对规则巨型框架结构表面风压计算的影响

Regulation mega frame structure surface wind pressure computation influence by beam and column concave-convex change

风压沿建筑物表面的分布具有复杂性,现行的GB50009-2001《建筑结构荷载规范》对风荷载平均风压取值的简化计算标准,只考虑到了大气层风压高度和建筑物体型等因素的影响。本文在风洞试验的基础上,通过对试验数据的数值分析和拟合,发现建筑物表面粗糙程度对建筑物表面的风压分布影响相当明显,并在此基础上得出了风压沿巨型框架结构不同表面粗糙程度下的简化计算公式。算例研究表明,建筑物表面不同粗糙程度引起的风压分布变化对规则巨型框架结构变形的影响较大,在设计中应予以考虑。

The wind pressure is very complex along with the building surface distribution,present ＂load code for the design of building structures＂（GB50009-2001） windward load average wind pressure value simplification considered the factor of atmosphere wind pressure highly and so on.This paper based on the wind tunnel test,and the tentative data numerical analysis and the fitting,discovered building surface roughness degree is obvious influence to the building surface wind pressure distribution,has obtained the wind pressure coefficient along the building surface roughness variety simplification formula.Calculated the example research indicated,regulation mega frame structure distort is great that influence by the building surface different roughness causes the wind pressure distribution change.Should consider in the design.