| 高层建筑的扭转风荷载功率谱密度 |
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| 引用本文： | 唐意,顾明,全涌. 高层建筑的扭转风荷载功率谱密度[J]. 同济大学学报(自然科学版), 2007, 35(4): 435-439 |
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| 作者姓名： | 唐意 顾明 全涌 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金;教育部高校骨干教师资助计划 |
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| 摘 要： | 利用高频天平技术，在四种不同风场中对13种不同尺寸的矩形超高层建筑的刚性模型进行了风洞试验，测量了这些模型的基底扭矩，即一阶广义扭转风荷载，考察了风场类型、模型长细比、厚宽比对高层建筑扭转广义风荷载谱的影响，并拟合出一个以风场类型、模型长细比、厚宽比为参数的高层建筑扭转广义风荷载谱的闭合表达式．通过与国外有关文献给出的结果的对比，验证了拟合公式的精度．
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| 关 键 词： | 高层建筑 扭转风荷载 高宽比 厚宽比 公式 |
| 文章编号： | 0253-374X（2007）04-435-05 |
| 修稿时间： | 2005-07-25 |
Power Spectral Densities of Torsional Wind Loads on Tall Buildings |
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| TANG Yi,GU Ming,QUAN Yong. Power Spectral Densities of Torsional Wind Loads on Tall Buildings[J]. Journal of Tongji University(Natural Science), 2007, 35(4): 435-439 |
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| Authors: | TANG Yi GU Ming QUAN Yong |
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| Affiliation: | Sate Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | 13 models of typical square and rectangular tall buildings are tested with high frequency force balance(HFFB) technique in a wind tunnel;and the base torques of these models,namely the first mode generalized torsional wind forces,are obtained accordingly.Effects of parameters such as wind-field,models' aspect ratio and side ratio on the first-mode generalized torsional wind loads of tall buildings are then studied.New formulas for the power spectral densities(PSDs) of torsional wind loads of the tall buildings are formulated by using the nonlinear least-squares method.And by comparison with the results from the present wind tunnel test and other literatures,the precision and applicability of the present formulas are finally verified. |
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| Keywords: | tall buildings torsional wind loads aspect ratio side radio formula |
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