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较长周期的(T1>1.4Tg)多高层规则建筑结构,在三类场地土(Tg=0.55s)条件下,采用底部剪力法计算水平地震作用沿房屋高度方向的分布时,《建筑抗震设计规范》(GB50011—2008)与《高层建筑混凝土结构技术规程》(JGJ3—2002)中的顶部附加地震作用系数在取值上存在较大差异。采用振型分解法,对该种情况下的结构进行了分析,得出顶部附加地震作用系数的变化规律。研究成果对于该类结构抗震设计具有一定的参考价值。
In the long-period (T1> 1.4Tg) multi-level regular building structure, under the conditions of three kinds of site soil (Tg = 0.55s), bottom shear method is used to calculate the horizontal seismic distribution along the height direction of the house. There is a big difference in the value of the additional seismic action coefficient at the top of the “Design Code” (GB50011-2008) and the “Technical Code for High-rise Building Concrete Structures” (JGJ3-2002). Using the mode decomposition method, the structure in this kind of situation is analyzed, and the law of the additional seismic action coefficient at the top is obtained. The research results have certain reference value for the seismic design of such structures.