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有些体形复杂的高层建筑,构件斜交,刚度不对称,地震作用的最不利方向与结构主轴成某一角度,扭转振动强烈。当建筑物平面尺寸较长或楼板刚度较小时,楼盖变形的影响也不容忽视。本文针对以上特点,提出刚性楼盖和弹性楼盖两种结构类型高层建筑的力学模型,建立其在多分量地面运动作用下的三维平面运动方程,并运用反应谱理论给出空间结构在双向地面平动分量作用下的地震内力计算方法。
In some high-rise buildings with complex shapes, the components are skewed and the stiffness is asymmetric. The most unfavorable direction of the earthquake is at a certain angle with the main axis of the structure, and the torsional vibration is strong. When the building’s plane size is long or the floor stiffness is small, the effect of floor deformation cannot be ignored. In view of the above characteristics, this paper proposes a mechanical model of a high-rise building with two types of rigid floor and flexible floor, sets up its three-dimensional plane motion equation under the action of multi-component ground motion, and uses response spectrum theory to give a spatial structure in two-way ground. Earthquake internal force calculation method under the action of translational component .