A Two-Stage Method for Structural Damage Prognosis in Shear Frames Based on Story Displacement Index and Modal Residual Force

Table 5

The properties of the 25-story shear frame.

Story number	Mass (kg)	Stiffness (MN/m)
1–5	100	500
6–10	100	400
11–15	100	300
16–20	100	200
21–25	100	100