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中美日三国规范高层结构风荷载标准值对比
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Comparative Study on the Nominal Value of Wind Loads on Tall Buildings Among the Codes of China, America and Japan
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    摘要:

    世界各国规范对高层结构的顺风向风荷载标准值都取多参数表达的计算式,各参数取值的差异最终反映到荷载标准值的大小.以参数分析为基础,对亚太地区具有代表性的中美日三国荷载规范关于普通高层结构顺风向风荷载标准值的取值原则和计算思路进行了对比.研究了基本风速、风剖面、紊流度、脉动效应系数等各参数的取值以及各参数间的相互影响,分析了脉动效应系数的取值和影响因素.以三个不同高度的典型结构为例,分别采用三国规范计算风荷载标准值及特征响应,并对不同国家规范荷载标准值和响应的差异进行了讨论.结果表明,对于结构顺风向风荷载标准值,日本规范最大而中美规范基本相当.

    Abstract:

    Most international codes and standards provide guidelines and procedures for assessing the along-wind nominal value of equivalent static wind loads on tall buildings. Despite their analogous multiple-parameters expression, notable scatter exists among the parameters and so among the nominal values of wind loads and wind effects predicted by the various codes and standards. Based on the comparative study of parameters, the GB50009 (China), ASCE7 (American), and AIJ (Japan) were selected as the representative codes in the Asia-Pacific region, and the calculation principles and methods of the nominal value of equivalent wind loads in the along-wind direction were reviewed. Parameters such as the basic wind velocity, wind profile, turbulence intensity, gust effect factor and also the inter-influence among them were considered. The gust effect factor and the influence on it were also expounded. A detail example including three representative buildings was presented to illustrate the overall comparison and the main findings were also highlighted in the example and the relevant discussion. The results show that the along-wind nominal value of equivalent static wind loads is the largest in AIJ and more or less the same in GB50009 and ASCE7.

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张军锋,葛耀君,柯世堂,赵林.中美日三国规范高层结构风荷载标准值对比[J].湖南大学学报:自然科学版,2011,38(10):18~25

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