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Project
Description
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This bridge will replace the existing
link, shown above, which forms part of the main
highway between the cities of Baguio and Manila. The
new bridge is 500m in length, and incorporates plan
curvatures of as little as 130 metres radius. The
bridge is supported on 12 piers, and is fixed at
piers five and six. A typical "free" pier has two
free sliding pot bearings and a central thrust
bearing with number LUDs connected between the pier
head and the bridge soffit. The LUD allows seismic
forces to be shared between all the piers. This
allows the designer to maintain a cost effective
regular pier section throughout the structure and
reduces foundation sizes.
The movement and thrust vectors are obviously
complicated due to the curvatures of the structure
and after a full analysis consultants designed an
arrangement of LUDs and guide bearings to be
installed at an angle to the primary axis of the
bridge. CI worked closely in partnership with a
bearing manufacturer to provide the client with
closely co-ordinated LUD and thrust bearing
solution. |