Page 300 - Advanced Design Examples of Seismic Retrofit of Structures

Example of a Steel Frame Building Retrofitted Chapter 5 289

ENY 1.2×Mean

Under (%) 1.0 0.7 1.6

Ratio

Drift Maximum 1.5 5.5 2.3

1.2×Mean 0.8 3.0 1.9

(%)
Ratio ENX

Drift Under Maximum 1.0 3.2 3.9

EPY 1.2×Mean
Under (%) 1.1 0.8 1.6

Ratio

Ratio Drift Maximum 1.4 5.7 2.9
Drift

Mean EPX 1.2×Mean

and Under (%) 1.5 3.1 1.9
Maximum Ratio Drift Maximum

5.5 building 1.0 3.2 building 3.9
TABLE Story Main 2 1 Sports 1