Proposal for the Structural Engineering Design Contest by Bastian Gerke and Markus Dörre

1. Fakultätsname XYZ Fachrichtung XYZ Institutsname XYZ, Professur XYZ
The 5th Bridge
Stuctural Engineering Design
International Competition:
Design proposal for the fifth
bridge over River Urumea
in Donostia – San Sebastian
(Spain)
Colegio de Ingenieros de Caminos, Canales y Puertos Madrid 14.11.2008

2. Markus Dörre:
M k Dö Bastian G k
B ti Gerke:
-Final secondary school examinations -Final secondary school examinations
in Erfurt, Germany in 2003 in Hamm, Germany in 2004
-Study at the TU Dresden - 9th Semester -Study at the TU Dresden - 9th Semester
-Work experience: Friedrich & Lochner GmbH – -assistent at the institute for steel construction
Nemetschek Group - Dresden -assistent at the institute for solid construction
-Work experience: Engels & Partner Dortmund,
Baubüro Müller Dresden, Krebs und Kiefer
consulting engineers - Dresden
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3. Main Concept:
To fi d
T find an ECONOMIC ,
but also ATTRACTIVE solution,
which fits in the existing ENVIRONMENT .
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4. ENVIRONMENT / Surrounding Area
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5. ENVIRONMENT / Surrounding Area
Existing Bridges:
-Typology of arch-bridges
-Load bearing structures below the gradient
Decision:
-The “5th Bridge“ doesn`t need a extra ordinary
supporting structure
-The “5th Bridge“ needs a soberly and simple
The 5th Bridge
appearance with a clear structure below the
gradient
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6. ATTRACTIVENESS
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7. ATTRACTIVENESS
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8. ATTRACTIVENESS
-No additional support in the area of the river ( nice challenge)
-To “haunche“ the girder to the support, more than usually necessary
Increase in stiffness at the restraint abutement
Attract the forces to the restraint abutement
Mode of action like two cantilevers
Reach an extreme slimness of the visible profile / in the center of the bridge
Form of the girder is like an arch, which integrates the bridge in the environment
-Cut notches in the girder more transparency and framework behaviour
-All in all: On the one hand, the profile takes itself back, but on the other
All i ll O th h d th fil t k it lf b k b t th th
hand the profile sticks out through its outstanding slimness, which
demonstrates the big challenge for the engineers.
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9. ECONOMY / CONSTRUCTION METHOD
-5 composite construction beams of a high strength steel (S355 or S460)
-Composite construction is a well known construction method
Composite
-The efficient exploitation of material properties in combination with modern
calculation methods should be the planning challenge to reach the absolute
limit of this modern composite construction
f
-The free span over the river avoids a cost-intensive deep foundation
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10. Economy / construction method
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11. Economy / construction method
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12. Economy / construction method
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13. ECONOMY / CONSTRUCTION METHOD
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14. ECONOMY / CONSTRUCTION METHOD
-The big advantage is the short construction time
-The main vision is to install the girders in one piece complete
prefabrication of the girders in combination with a oversea delivery, due to
delivery
the near to the coast (alternative solution would be a 2-piece delivery and a
welded joint on site - directly in the center of the bridge)
-Through the efficient application of a “l
Th h th ffi i t li ti f “loosen f formwork“ (prefabricated
k“ ( f b i t d
concrete deck elements) it`s possible to pour the concrete deck without an
installation of a scaffold in the area of the river. It`s also possible to avoid
the difficult cantilever construction method.
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15. Finished Bridge – “The 5th Bridge“
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18. Thank you for your attention!
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