From the point of three-stage principle of seismic design and performance-based design, the story-drift limit of EBF structure should be more strict than the pure frame. 為滿(mǎn)足性能設計和三水準抗震設計要求,偏心支撐框架結構的側移限值應比純框架結構更嚴格,而且使得支撐的受壓屈曲控制在第一水準位移后,將有利于抗震性能的改善。