建筑结构学报2011，Vol.32Issue(4)：39-45,7.
考虑二阶振型的矩形高层建筑横风向风振响应简化计算
Simplified formulas for evaluation of cross-wind induced dynamic responses of rectangular high-rise buildings considering the second mode
摘要
Abstract
With the height of highrise buildings increasing, the natural periods of the lower modes become longer, and the contribution of the second mode to wind-induced dynamic responses of the buildings increases.The contribution of the second mode was analyzed through a large number of illustrative examples.The calculated results indicate that the contribution of the second mode to the dynamic displacements of high-rise buildings in across-wind direction is rather small.However, its contribution to the acceleration of super-highrise buildings in across-wind direction can not be neglected.Therefore, the contribution of the second mode should be considered when the comfort analysis of wind-resistant super-highrise buildings is conducted.In addition, based on wind tunnel test data and random vibration theory, simplified empirical formulas for the evaluation of across-wind induced dynamic responses of rectangular tall buildings, were derived with the consideration of the second mode contribution.The comparison between the results estimated by the formulas and those obtained by complex integral calculations show that the errors between them are basically within 5％ for all cases.Thus the formulas proposed in this paper are very actuate.关键词
矩形高层建筑/横风向动力响应/二阶振型/简化计算式Key words
rectangular high-rise building/ cross-wind induced dynamic response/ second mode/ simplified empirical formula分类
建筑与水利引用本文复制引用
邹垚,梁枢果,彭德喜,邹良浩..考虑二阶振型的矩形高层建筑横风向风振响应简化计算[J].建筑结构学报,2011,32(4):39-45,7.基金项目
国家自然科学基金项目(90715023). （90715023）
