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本文在随机风速假定是各态历经过程的基础上,通过随机振动理论振型分解法,考虑空间相关性,针对高耸结构的特点,得到风振系数可表示为β(z)=1+ξunr(z)。按常用的阻尼比ζ1=0.01、风速V_(10)=25m/8、重量和宽度沿高度不变等情况下作出了通用表格。对于非上述标准情况的计算,本文通过大量电算,得到了不同阻尼比ζ1不同风速V_(10)、以及不同的尺寸形状和重量变化的修正系数,并制成了图线。算例计算表明,提供的方法既较符合理论上的严密性,所提供的图表,又较适用于常见的各种不同情况,计算方便,因而可供实际应用和供荷载规范修订和高耸结构设计规范制订时参考。
In this paper, based on the assumption that the random wind speed is the ergodic process, the random vibration theory decomposition method is used to consider the spatial correlation. According to the characteristics of the high-rise structure, the wind vibration coefficient can be expressed as β(z)=1+ξunr( z). The common table was made according to the commonly used damping ratio ζ1=0.01, wind speed V_(10)=25m/8, weight and width constant along the height and the like. For non-standard calculations above, a large number of calculations were used to obtain correction coefficients for different wind speeds V_(10) with different damping ratios ζ1, and different size shapes and weights, and plots were made. The calculation of the calculation example shows that the provided method not only accords with the rigor of the theory, but also provides the charts. It is also more suitable for various common situations. It is convenient for calculation and can be used for practical application and revision of load specifications and high-rise structure design. Reference is made to the specification.