安装磁摩擦耗能装置的结构抗震设计

Seismic design of structures with magnet-friction energy dissipation devices

摩擦耗能装置是一种有效的被动耗能装置,可以有效地减小结构在地震、风荷载等作用下的反应。本文提出了安装磁摩擦耗能装置的抗震设计方法,首先采用振型分解反应谱法计算安装磁摩擦控制装置的结构地震反应,在振型分解反应谱法的计算过程中,为了与现行建筑抗震设计规范接轨,从能量的角度计算安装磁摩擦耗能装置提供给结构附加的阻尼,采用迭代方法直接改变结构的阻尼比计算结构地震力,进而求得结构的地震反应;其次采用时程分析法校准结构的地震反应;最后用示例说明了这种方法的有效性。

The response spectrum modal analysis method was used to calculate the response of structure with two kinds of magnet-friction devices.In the course of the response spectrum modal analysis,the method of calculating the damping ratio from the point of energy dissipation was used.In order to meet the requirement of the current structural seismic code,the iteration method was also used to calculate the damping,and furthermore,to calculate the seismic force and seismic response.The time history analysis method was used to adjust the response spectrum modal analysis method.Finally,analysis of an engineering project was presented to illustrate the validity of the method.