【摘要】 将超高层建筑束筒结构与其基础等效连续化为一个支撑在半无限大弹性地基上具有三维连续分布刚度和质量特性的加劲薄壁筒组合体,并以此模型,对其在多维简谐动力作用下的稳态反应进行了半解析分析,并计算出了共振响应,那就是当激励荷载的频率与结构系统的自振频率很接近时,结构的动力响应会出现非常大的突变。计算结果表明:模型的简化是合理的、可行的,从而为超高层建筑束筒结构的整体动力分析提供了一种可行的方法,并给出了几点对此类结构的抗震设计有指导意义的结论。更多还原

【Abstract】 Super tall building bundled tube structure, together with its foundation and the subgrade is simplified equivalently and continuously into a three-dimensional model, a combination of stiffened-thin-wall tubes on semi-infinite elastic subgrade. The steady-state response of the model subject to multi-dimensional harmonic deterministic dynamic loadings was analyzed by semi-analytical method. The resonant response was found, i.e., step change will occur when the frequency of the excitation load is much close to the natural frequency of the structural system. The numerical results show that the analytical model and the method are effective and reasonable. A practicable method for the dynamic analysis of the super tall building bundled-tube structures is thus investigated. Some reasonable and significant conclusions are also presented.更多还原