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70年代初,我们与中科院武汉岩体土力学研究所等单化,对(H/D<25)的一般石油化工塔型设备(塔壁厚δ<30mm)的自振特性进行了测试和研究,提出了计算此类塔的基本自振周期T值的经验公式,已被编入《建筑结构衙载规范》(GBJ9-87)(以下简称“规范”)中。在应用上述公式时,“规范”作了注明,即“公式(附4-13)不适用于H/D>25的化工塔架”。为了摸清这类塔的T值情况,近年来,我们先后在上海、北京、南京等地对H/D>25的塔类进行了实测和分析,提出了计算此类塔T值的经验公式。
In the early 1970s, we worked with the Institute of Soil Mechanics, Wuhan Institute of Rock Mechanics, Chinese Academy of Sciences, etc. to test and study the natural vibration characteristics of general petrochemical tower equipment (column wall thickness δ<30mm) for (H/D<25). An empirical formula for calculating the value of the basic self-oscillation period T for this type of tower has been proposed and it has been compiled into the “Code for the Loading of Building Structures” (GBJ9-87) (hereinafter referred to as “the specification”). When applying the above formula, the “norm” states that “formula (4-13) does not apply to chemical towers with H/D>25”. In order to understand the T value of these towers, we have conducted actual measurements and analysis of towers with H/D>25 in Shanghai, Beijing, and Nanjing in recent years, and proposed an empirical formula for calculating the T values of these towers. .