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.

• 为满足性能设计和三水准抗震设计要求，偏心支撑框架结构的侧移限值应比纯框架结构更严格，而且使得支撑的受压屈曲控制在第一水准位移后，将有利于抗震性能的改善。