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多点风激励下高层建筑响应分析方法

DOI: 10.13577/j.jnd.2014.0309, PP. 66-75

Keywords: 风振响应,CQC方法,SRSS方法,谐波激励法,谱分解法

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Abstract:

以高层建筑风振响应分析方法为研究对象,推导了CQC方法和SRSS方法的计算公式;同时,特别介绍了谐波激励法(HEM),并在虚拟激励法的基础上提出了一种新的算法――谱分解法(SDM)。将这些方法用于广州西塔风振响应分析中,结果表明:CQC方法是精确算法,但计算量大;SRSS方法计算效率高于CQC方法,但会损失计算精度;HEM方法占用内存少,计算效率高;SDM方法具有和CQC方法一样的精度,但计算效率更佳。通过精度和效率的对比分析,建议在高层建筑风振响应分析中优先采用HEM方法和SDM方法。

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