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基于高层连体结构受力特点与地震地面加速度在强震阶段的大致平稳性,采用串并联质点系层模型,运用虚拟激励法先求出单塔结构在各个楼层位置处的自谱值,再以连体毗邻楼层的自谱响应作为连接体多点完全相干的平稳随机激励,求出结构各楼层层间位移标准差及连体相对位移标准差,变换连体位置详细讨论了连体位置对结构动力特性、毗邻结构层间位移标准差及连体自身相对位移标准差的影响。研究结果表明:连体位置对结构刚度较弱的单塔的影响大于刚度较强单塔;连体的响应标准差随连体位置上升而逐渐加大;连体的响应标准差远大于楼层层间位移标准差。同时,分析了结果产生的原因,为高层连体结构的设计与分析方法提供参考。
Based on the stress characteristics of high-rise Siamese structure and the general stability of earthquake ground acceleration during strong earthquakes, the tandem parallel mass point system model is used. The virtual excitation method is used to find the self-spectrum value of single tower structure at each floor. Based on the self-spectrum response of adjacent sub-floors as the steady random stimuli with multi-point and complete coherence, the standard deviations of interlayer displacements and the standard deviations of the relative displacements are calculated and the conjoined positions are discussed in detail. The dynamic characteristics of the structure, the standard deviation of displacements between adjacent structural layers and the standard deviation of the relative displacements of the connected body. The results show that the influence of the conjoined position on the single tower with weaker structural rigidity is greater than that of the single tower with stronger rigidity. The standard deviation of the conjoined response gradually increases with the position of the conjoined body. The response standard deviation of the conjoined body is much larger than that of the floor Standard deviation between displacement. At the same time, the causes of the results are analyzed, which provides reference for the design and analysis of high-rise Siamese structures.