Page 501 - Advanced Design Examples of Seismic Retrofit of Structures

444 Advanced Design Examples of Seismic Retrofit of Structures

FIG. 6.43 Failure modes of wall specimens after static cyclic testing. (A-I) URA-WO. (B-I) URA-
LW. (C-I) URA-DW. (A-II) SMRA-WO. (B-II) SMRA-LW. (C-II) SMRA-DW. (A-III) SSRA-WO.
(B-III) SSRA-LW. (C-III) SSRA-DW. (A-IV) CWRA-WO. (B-IV) CWRA-LW. (C-IV) CWRA-
DW. (Photos taken by Mohammad Yekrangnia.)

Comparison of parts A-I and A-II of this figure shows the effects of adding
steel mesh, with detachments of the walls in the retrofitted specimen compared
to the major shear sliding crack in the corresponding specimen. The main weak-
ness of specimen SMRA-WO is therefore detachment of the perpendicular
walls. Although the steel mesh was bent to cover this critical section, a better
response improvement in this location can be achieved by installing steel
L-shaped or box profiles at the intersection of the perpendicular walls in order
to prevent detachment of these walls. This detail was implemented in the other