Page 216 - Handbook of Materials Failure Analysis

212 CHAPTER 8 Seismic risk of RC water storage elevated tanks

FIGURE 8.10
The four axes of the landmark.

FIGURE 8.11
Drawing of the landmark on the cracking area.

According to the Table 8.22, the importance of cracking is considered moderate.
And, as the cracking index is between 1 and 5, this parameter “maintenance” is clas-
sified as class B.

5.13 DETERMINATION OF THE VULNERABILITY INDEX
The vulnerability index value of the tank calculated according to the Table 8.23,
classes the tank vulnerability in the Orange level 1. The tank has an average vul-
nerability to seismic risk. A repair program is necessary to increase its seismic
strength.