Abstract
This paper describes about column-to-beam strength ratio and stiffness ratio of existent steel moment frames. Eighteen analytical frames for seismic response analysis as well as twelve existent frames are prepared with applying the current Japanese criterion on seismic resistance. Numerical simulations on column-to-beam strength ratio and stiffness ratio are carried out for these frames. As the result, it was clarified that most of the strength ratio and the stiffness ratio are higher than 2.0. The analytical results are higher enough than the required value of both the strength ratio and the stiffness ratio, those are regulated in order to restrain damage concentration on observed story.
