Page 18 - Jabalpur_EQ

Introductlon
Chapter 1

satisfactorily. The slender walls resulting from long unbraced length and
no effective connection between the wall and the roof slab are two primary
causes for such a dismal performance of stair enclosures. These cantile-
vered structures located around a discontinuity in the diaphragm are
extremely vulnerable to amplified ground motion in upper stories. A care-
ful study is needed to reduce the hazard of the debris falling on escaping
inhabitatnts and blocking stairs and exits.
8. Need for seismic instrumentation:Since real earthquake provide the best
test of earthquake performance, it is imperative that important engineering
structures such as dams, bridges, important buildings and industrial facil-
ities, should be provided with adequate instrumentation so that quantita-
tive evidence can be gathered which will help evaluate the safety of the

prevalent construction practices as well as adequacy of various Indian
codes.
9. Seismic evaluation, repair & rehabilitation issues: In Jabalpur, the need
for repair and rehabilitation is more pressing and care should be taken that
these activities are executed properly. Otherwise, the damaged statistics
will escalate in future earthquakes due to existing weaknesses. Despite the
fact that URMs constitute the majority of the building stock in almost all

parts of the country, little has been done in the way of their seismic evalu-
ation and rehabilitation. There is an urgent need for a document which
prescribes a consistent set of methods to evaluate existing buildings for
structural deficiencies as well as how to rehabilitate the building to meet
acceptable performance limits.
10.Medical emergencies: The electric power and water supply are the two
most important services which should have been available at the hospital
facilities in order to respond to medical emergencies. A backup electric

power supply and an alternative arrangements for water supply is a must
for all hospitals.

REFERENCES

BIS. (1984). IS:1893-1984 Criteria for Earthquake Resistant Design of Structures
Bureau of Indian Standards, New Delhi.
BIS. (1993). IS:13920-1993 Ductile Detailing of Reinforced Concrete Structures Sub-
jected to Seismic Forces Code of Practice Bureau of Indian Standards, New
-
Delhi.
Nav Bharat Daily, May 23, 1997, pages 1 &9
-May 24, 1997, pages 1&11.
- May 25, 1997, page 8.
- May 27, 1997, pages 1, 7, & 12.

-June 2, 1997, page 9.
TCPO. (1991). Jabalpur Development Plan, 1991, TCPO, M.P.

Jabalpur Earthquake of May 22, 1997 8