Page 497 - Advanced Design Examples of Seismic Retrofit of Structures
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440 Advanced Design Examples of Seismic Retrofit of Structures
TABLE 6.8 Sequential Excitation in the Specimens (PGA Excitation to the
Prototype is Scaled to 0.35g)
Step No. Unretrofitted Specimen Retrofitted Specimen
1 25% 25%
2 75% 100%
3 100% 125%
4 125% (collapsed) 150%
5 – 175%
specimen and anchored at the other end of the parallel wall. Details of using
horizontal steel rods tying the parallel walls are shown in Fig. 6.38. In order
to ensure the contribution of the rods even during small to moderate seismic
actions, slight pre-stressing on the rods together with using spring washers at
the anchorage location is recommended.
60
60
110
60
60
60 60 110 60 60
Plates and nuts
(A) Steel horizontal rods
Washer and spring washer
Nut
Thread
Horizontal steel rod
(φ22 mm)
Steel plate
(B)
FIG. 6.38 Horizontal steel rods tying the parallel walls (dimensions in cm). (A) Plan view.
(B) Details of connection to the walls.
