Abstract:

The damage results of the wenchuan earthquake in 2008 and the yushu earthquake in 2010 show that the staircase in frame structure has been destroyed seriously, which jammed the withdraw way .The paper, based on the findings of actual earthquake damage survey of the staircase in frame structure, analyzed the mechanism of stair damage in the previous earthquake ,the damage occurs mainly in stairway flight, frame column, stair column, stair beam and platform plate and then indicated the necessity of seismic design for stairs. By analyzing of the current code and combining recent years research, proposed several design suggestions which will help to improve the seismic behavior.

Key words: frame structure, staircase, seismic design, design suggestion