超高层建筑横风向风振响应计算的响应谱法

发布时间：2018-05-27 11:19

本文选题：风振响应 + 位移响应谱　；参考：《土木工程学报》2015年S1期

【摘要】：根据超高层建筑横风向风振响应的特点,提出了超高层建筑横风向风振计算的响应谱法,相对于传统计算方法,响应谱法具有以下特点:(1)响应谱法基于横风向风荷载沿建筑高度分布的特征及随机振动理论分析计算结构响应,该方法直接对分析结果进行数据拟合,相比于传统方法只拟合建筑风荷载基底合力均方值及功率谱密度函数的特点,该方法减少了计算中间过程,减小了计算误差。(2)采用响应谱方法计算结构响应时,可以考虑多阶振型的贡献。(3)响应因子本质上是反映结构振动对准静态风荷载放大作用的响应谱,在应用上与地震作用计算方法类似,便于工程人员理解和应用。由于公式简单、易于理解,响应谱法具有较好的操作性,可为超高层建筑横风向抗风设计提供参考。
[Abstract]:According to the characteristics of wind vibration response in cross wind direction of super high-rise building, the response spectrum method for wind vibration calculation in cross wind direction of super high-rise building is proposed, which is compared with the traditional calculation method. The response spectrum method is based on the characteristics of the wind load distribution along the height of the building and the random vibration theory to analyze and calculate the structural response. Compared with the traditional method, which only fits the mean square value of the base force and the power spectral density function of the wind load, the method reduces the intermediate process of calculation and reduces the calculation error. 2) when the response spectrum method is used to calculate the structural response, It can be considered that the response factor of multi-order vibration mode is essentially a response spectrum reflecting the effect of structural vibration on static wind load amplification, which is similar to the calculation method of seismic action in application, and is easy for engineers to understand and apply. Because the formula is simple and easy to understand, the response spectrum method has good maneuverability and can be used as a reference for the cross-wind resistance design of super high-rise buildings.
【作者单位】：中国建筑科学研究院;
【基金】：国家“十二五”科技支撑计划项目资助(2012BAJ07B01)
【分类号】：TU973.213

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