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该文根据刚性模型测压风洞试验结果,给出了确定等效静力风荷载的反演法,其中,位移等效静力风荷载是在已知最终位移的基础上,运用虚拟广义坐标的概念,根据线性最小二乘法进行反推,而内力等效静力风荷载则在最终截面内力已知的基础上,根据悬臂梁静力平衡法进行反推。值得注意的是,计算等效静力风荷载所需的最终响应是根据完全二次型组合方法(CQC)求出的,不再分成背景分量和共振分量,而且还可以考虑多振型的耦合。以陆家嘴X3-2地块办公楼为例进行刚性模型测压风洞试验,根据反演法计算出位移等效静力风荷载和内力等效静力风荷载,然后由静力法求出最终响应,通过与CQC法直接计算的结果对比来说明其有效性。
In this paper, the inversion method of determining the equivalent static wind load is given according to the test results of the rigid-model wind tunnel in which the displacement equivalent static wind load is based on the known final displacement. The virtual generalized coordinate According to the linear least squares method, the thrust is deduced, while the internal force equivalent static wind load is deduced according to the cantilever static balance method based on the known internal force of the final section. It is noteworthy that the final response required to calculate the equivalent static wind load is based on a complete quadratic combination method (CQC) and is no longer divided into a background component and a resonance component, but also multi-mode coupling . Taking the Lujiazui X3-2 block office building as an example, the rigid model pressure wind tunnel test was carried out. According to the inversion method, the displacement equivalent static wind load and the internal force equivalent static wind load were calculated, and then the static load Response, by comparing with the direct calculation of CQC method to illustrate its effectiveness.