Page 101 - Jabalpur_EQ
P. 101
Chapter 6 Lifelines
BARGI DAM TOE POW ER HOUSE
EL 427 M.P.E. B. BARGI NAGAR
NNNNNN
EL 396
EL 365
EL 358
Figure 6-6. A cross-sectional view of the power house at the Bargi Dam.
However, the power house stopped its electric power generation when the
ground shaking tripped the system. The power house was operational after few
hours during which the facility was inspected for any damage. Some cosmetic
damage due to pounding at the junctions of structural units were observed. The
power house building is a concrete frame system, 21.6 m long separated in to
three structural units by construction joints. A cross-sectional view of the
power
house is shown in Fig. 6-6. The gaps provided as construction joints seemed not
adequate to accommodate seismic deformations that building units experienced
during the earthquake.
No seismic instruments were installed on the Bargi Dam structure. The
pounding
damage to power house building, tripping of the power generation system, and
damage to residential quarters, offices and other buildings in the nearby Bargi
Nagar, suggest that the area suffered moderate to major shaking. It should be
noted that the dam and
power house structures were not subjected to the max-
imum credible earthquake and therefore, there is no cause for
complacency
the seismic safety of these structures. Since real earthquake provide about
of earthquake performance, it is imperative that the best test
such as Bargi Dam, should be provided with important engineering structures
adequate instrumentation so that
quantitative evidence can be gathered which will help evaluate the safety of these
constructions.
Jabalpur Earthquake of May 22, 1997
91
