Page 37 - World Of Nurol Magazine-27

kinds of soil investigations of the “The only
region geologically and seismically applicable
in 2010 in 4 months. After that,
FUGRO Company determined the criteria in the
design criteria for İzmit Bay Crossing
Bridge, drew the maps of the ranking of
region with and without faults and Suspension
made the earthquake engineering
interpretations including the Bridges in
following subjects:
the world
• It developed the “seismo-technical engineering
modeling of the region”.
• It determined the seismic damage literature is
analysis probabilities.
• It determined the non-linear soil the main span
reaction analyses.
• It developed the design ground distance. With
movements by taking into 1.550 meters of
consideration sinking effect.
• It made the fault displacement middle span,
probability damage analyses.
Osmangazi
A safe bridge design with seismic Bridge ranks
resistance was found as a
th
consequence of this information. 4 among the
There was the information that in largest bridges
the original design of the bridge the of the world.”
distance between the two towers
was greater and the southern tower
was on land. As far as we can see
from the later implementations,
the distance was shortened and
became 1,550 m. and the southern
tower was relocated in sea. Can we
learn the reason for this?

As the sea span crossed by the
bridge is 3000 meters, the bridge
towers always had to be in sea.
In the batimetric measurements
NÖMAYG had FUGRO Company
perform in April 2010, it was found
out that the planned location of the
southern tower at around -5 meters
depth was a very steep slope with
landslide track.
As it was not appropriate to place
the tower foundation on this slope,
the southern tower had to be moved
towards north 150 meters. In order
to keep the bridge span constant,
it would have been necessary to
move the Northern Tower and
Northern Anchorage together with
the Southern Tower toward north by
the same distance, but in that case
Northern Anchorage block would
overlap with the existing railroad
line. For this reason, Northern Tower
and Northern Anchorage were left in
their places and only the Southern
Tower was moved towards north.

I watched the construction video
of the towers with admiration. One
feels proud, seeing the level of the
technology and its implementation
in our country. What are the
technical characteristics of
Osmangazi Bridge, such as length,
span, height?

The only applicable criteria in the
ranking of Suspension Bridges in
the world engineering literature is
Osmangazi Bridge 37