The present study aims to evaluate the suitability of
infilled steel tube columns of fibre reinforced polymer confined concrete in
vulnerable areas of instability in the basement of the Bhuj Earthquake
Epicentral Zone, Gujarat , India. In order to understand the sub-surface
structural characteristics of a sedimentary basin, basement mapping is
necessary, which in turn paves a way for better tectonics understanding. Based
on the nature of the subsurface system , it is important to design all the
major civil structures. A field experiment with a relatively new geophysical
technique, Magnetotellurics, was performed in order to define certain zones and
to find new types of construction. In the Bhuj earthquake epicentral zone and
21 earthquake epicentral zone, a broad band (1000-0.001 Hz) magnetotelluric
analysis has been taken up. In order to understand the deep structure of the
area, sites were occupied by three profiles during March-April 2001. In
addition, the area surrounding Bhuj was previously tested with a variety of MT
profiles, and in addition to seismotectonic studies, the subsurface structure
is well restricted from the point of view of hydrocarbon exploration. Owing to
the extreme loading conditions, structural damage takes place in the columns
and results in inadequate stiffness and ductility. In this report, the findings
of the investigation are described in two steps. In step I, considering these
databases, the results obtained along a 130 km long profile from Mundra to
Rapar oriented in the NE-SW direction passing through the epicentre are
presented. The structure of the subsurface has shown an interesting connexion
with surface deformation. A new structure of the basement and associated
seismotectonics of the area was established. The key result is related to the
configuration of the basement and surface ruptures. In phase II, our
experimental research is expanded to determine the efficiency of in-filled steel
columns of fibre reinforced polymer wrapped concrete subjected to lateral
loading in seismic regions. The parameters involved in this research process
are the type of fibre The shape and shape of a steel pipe. The results revealed
that, compared to columns, the Fibre reinforced polymer wrapped concrete
in-filled steel columns have greater load carrying ability and capacity for
energy absorption and exhibit ductile behaviour. In civil structures in
vulnerable zones defined from the first stage of our research, we suggest
following these kinds of columns. An significant correlation is observed from
the analysis of surface deformations mapped at several locations across the
epicentral zone and the basement undulations of the present research.
Considering the tectonic forces acting on the fragile sedimentary formations,
this has been clarified, whereas the hard rock basement is relatively stable.
Author (s) Details
Dr. S. Kareemunnisa Begum
Department of Geophysics, Andhra University, Visakhapatnam, India
Dr. P. Gajalakshmi
ESPAC and Department of Civil Engineering, B. S. Abdur Rahman Crescent
Institute of Science & Technology, Chennai, India.
Dr. J. Revathy
ESPAC and Department of Civil Engineering, B. S. Abdur Rahman Crescent
Institute of Science & Technology, Chennai, India
Dr. T. Harinarayana
ESPAC and Department of Mechanical Engineering, B. S. Abdur Rahman Crescent
Institute of Science & Technology, Chennai, India. Earlier worked at GERMI,
Gujarat and CSIR-NGRI, Hyderabad
View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/279
