Page 99 - Jabalpur_EQ

Chapter 6
LIfelines

Non-Bullding Systems

0.250
5% Damping
"***************% UBC.96 (R3)

UBC:96 (R -4)
************
.
0.125
*..oo..ao.**** ********s*n**s*****
.seeennesasasoeasa*n

IS1893:1984 (K=1)
000 uul
0 1 3
Period (s)

Figure 6-4. Compari- Building Systems
son of IS:1893-1984 and 0.250
5% Damping
UBC:96 design response
spectrunm curves for
building and non-build-
ing systems. For
IS 1893:1984, P=1.2, 0.125 IS1893:1984 (K=1)
UBC:96 (R-8)
F0.2, I=1.5 for water
tanks and I=1 for ordi- -- UBC:96 (R =12)
nary buildings. For
UBC:96, Z=0.2, I=1.25
0.00
for tank and I=1.0 for
0
ordinary buildings. Period ($)

Furthermore, there are no provisions in IS codes for ductile detailing of tank stag-
ings. It is expected that these structures will undergo inelastic deformations dur
ing a maximum credible earthquake. The New Zealand recommendations (MWND
New Zealand 1981) and Eurocode 8, part 3 (CEN 1993) like UBC:96 expects a duc-
tility value ranging from 1.7 to 2.5, which can only be achieved by proper ductile
detailing.

ELECTRIC POWER

The electricity supply was lost much throughout the Jabalpur city and adjoining
areas of greater shaking after the earthquake. However, it was restored in some
areas after about 15 minutes and in others after a few hours.

Jabalpur Earthquake of May 22, 1997 89