楼板刚、弹性计算假定对梁式转换高层建筑地震作用效应的影响

论述了楼板刚弹性计算假定对梁式转换结构地震反应的影响。提出楼层地震剪力在抗侧力构件中的分配除按楼盖的刚性、柔性和弹性三种情况考虑以外,还存在另一种分配方式,即转换层上邻近楼层框支剪力墙分配的地震剪力受转换层下部结构落地剪力墙设置的间距和楼板面内变形的影响。建议进行复杂高层建筑结构内力与位移计算时,楼板宜按弹性考虑。

Effects of Floor Rigid or Flexible Hypotheses on Seismic Response of Tall Building with Transferring Beams

The effect on seismic responses of structure with transfer beams is discussed when horizontal diaphragms are assumed to be rigid or flexible.Except that the story shear forces of earthquake are assigned among the vertical lateral force-resisting members with the three types of rigidity,flexibility,and elasticity of the floor,the other kind of assignment is introduced that translated shear walls in adjacent stories above the transfer story receiving shear forces is impacted by spaces of shear walls below the transfer story and in-plane diaphragm deformations.Therefore,the advice that a flexible diaphragm model should be adopted in calculating internal forces and displacements of complex tall building structure is presented.