100
Category 2: Civil Structures
2
Recalculation Prestressed Bridge Drechtbrug - Leimuiden, The Netherlands
SE
Nebest B.V.
Contact
Peter Breevoort (Tauw B.V.)
Address Schoonhovenseveer 31-33
2964 GB Groot-Ammers, The Netherlands
Website
Nebest B.V. is an engineering office, specializing in inspections, technical
advice and project management of infrastructure, electrical and civil projects.
Nebest B.V. has many years of experience and knowledge of inspections
and maintenance of concrete, steel and wood constructions. In collaboration
with premium foreign institutions, Nebest B.V. has gained exclusive
knowledge and experience in the development and practice of new research
methods. Nebest B.V. specialises on advice in: visual inspections, labatory
research, specialized technical inspections and maintenance advice.
The calculations for this project were made in collaboration with Tauw B.V.
Owner
Province Zuid Holland
Architect
Unknown
General Contractor
Nebest B.V.
Engineering Office
Nebest B.V.
Construction Period 1951 - 1952
The bridge was built in 1951/1952 near Leimuiden in Holland over the
river De Drecht. The bridge has a total length of 80 m.
Due to the increase of traffic loads in the Eurocode, the bridge needs to
be replaced by a new bridge in the near future.
As part of the building process of a new bridge, the old bridge will be half
demolished in the direction of the main girders. The remainder of the old
bridge will be used to enable traffic to continue to cross while the new
bridge is being built in the same location as the old bridge.
SCIA Engineer is used to calculate the forces in the remaining half of
the old bridge. For this a 3D model is used. The girders are modelled as
ribs with a lot of variable cross sections along the bridge. SCIA Engineer
automatically calculates the rigidity of all the cross sections and calculates
the forces in all the different load combinations.
The main challenge was to recalculate the old bridge based on drawings,
data on prestressed girders, model data and calculation results in
SCIA Engineer to find out the load capacity of the old bridge.
