Page 361 - Advanced Design Examples of Seismic Retrofit of Structures

334 Advanced Design Examples of Seismic Retrofit of Structures

FIG. 5.17 Foundation uplift (cm) of the main building. (A) 1.1(DL + LL)+ EPX. (B) 1.1(DL
+ LL)+ EPY.

functionality of the building. The foundation adequacy to resist the considerable
forces from the braces also play an important role in the design process of the
retrofit.

5.9.3.2 Eccentric Braces
Similar to the concentric braces, adding eccentric braces to the existing build-
ings leads to architectural concerns. One of the advantages of this method over
concentric braces is the ability to control the failure mode from the braces to the
link beam. The design of this beam can be done with the aim of flexural or shear
failure preceding the failure in braces. The ductile failure of the link beam can
provide large energy dissipation capacity compared with buckling of the