For a system with a fundamental natural period in the long-period range, maximum displacement governs the seismic design. 对于长周期结构,地震最大位移反应是结构抗震设计的控制因素。
The natural frequency is an important parameter of building, it reflects the structural dynamic feature and lays the foundation of seismic design. 频率是结构固有的重要参数,它反映了结构的动力特性,也是结构抗震设计的重要基础。