By using the finite element software SAP2000

five kinds of static pushover models have been established to study the influence on the seismic performance of frame by analyzing structural performance point

inter-story displacement angle

stiffness degradation

and yield mechanism

which include the model containing stairs or not

strengthening the frame’s corner columns in stair

using the sliding connection to stair board

and adding ladder columns.The analysis results are as follows.Whether strengthening corner columns in stair or using sliding connections to stair board can increase the ductility of the structure

by contrast

the model with sliding connection not only has greater ductility but also has the most significant influence on structural performance point;Moreover

from the result of structural stiffness degradation

such connections can keep the structural lateral stiffness better.When it comes to the yielding mechanism

in spite of the enhancing for some structural members

the model using sliding connections turns out to be ideal;In addition

the staircases with resistance connections are severely damaged

and adding ladder columns causes havoc on ladder columns

which may leads to the whole stair’s collapsing.