Universal equivalent static wind load distributions reproducing maximum load effects for all structural members

研究了再现所有结构构件最大风荷载效应的通用等效静力风荷载。在边界层风洞中对大跨度悬挑屋盖、穹顶屋盖、高层建筑等多种类型的结构进行了多通道同步脉动压力测量。基于结构的有限元模型进行了时程响应分析，提取了各构件的轴力、剪力或弯矩等最大风荷载效应。利用脉动压力场POD分析的特征向量和奇异值分解得到的系数，得到了普适等效静风荷载分布。然后将该方法应用于大跨度悬挑屋盖等结构，得到了一些通用的等效静力风荷载分布实例，并将其存储在数据库中。将该方法推广到…的情况更多的是包括共振分量在内的最大风荷载效应。要解决的难题之一是最大和最小载荷效应的符号组合。在某些情况下，得到的普遍等效静力风荷载分布可能是不规则和不自然的，这似乎不适合于一般应用。结果表明，最大荷载效应的符号可以从内力的POD特征振型中确定，得到的普遍等效静风荷载分布是光滑和自然的。将时程反应分析得到的最大荷载效应与GLF法、LRC法和通用等效静力风荷载法进行了比较。GLF法和LRC法估算的最大荷载效应与实际最大荷载效应相差较大，而通用等效静力风荷载方法再现的最大荷载效应在所有情况下都与实际最大荷载效应吻合较好。较少

The universal equivalent static wind load that reproduces the maximum wind load effects of all structural members was studied. Multi-channel simultaneous fluctuating pressure measurements were made for various types of structures such as long-span cantilevered roofs, dome roofs, high-rise buildings and so on in a boundary-layer wind tunnel. Time-domain response analyses were conducted based on the FEM models of structures, and the maximum wind load effects such as axial forces, shear forces or bending moments in all members were extracted. The universal equivalent static wind load distribution was derived using the eigenvectors of the POD analysis of the fluctuating pressure field and coefficients obtained by a singular value decomposition. The method was then applied to a long-span cantilevered roof structures and others, and some examples of the universal equivalent static wind load distributions were obtained and stored as a database. The method was extended to apply to the cases of … More the maximum wind load effects including a resonant component. One of the difficult problems to solve was the combination of the signs of the maximum and minimum load effects. In some cases, the obtained universal equivalent static wind load distributions could be irregular and unnatural, which seemed to be inappropriate for general application. It was found that the signs of the largest load effects could be determined from the POD eigen-modes of the internal forces and that the obtained universal equivalent static wind load distributions were smooth and natural. Largest load effects estimated by the time history response analyses were compared with those reproduced by the GLF method, the LRC method and the universal equivalent static wind load method. The largest load effects estimated by the GLF method and the LRC method vary widely from the actual largest load effects, but those reproduced by the universal equivalent static wind load method showed good agreement with the actual largest load effects in all cases. Less