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project bridge

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Valentin colle

on 12 March 2013

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Transcript of project bridge

Concrete bridge Project bridge Structure Arch bridge Suspension bridge Beams bridge Design of bridge element Steel bridge Main beam Transversal beam Joints Statical Model Functional requirement Execution Statical analysis After the choice of the span of 2meters we choose to use 9 main beams witch takes all the vertical loads. On the beam we use a concrete deck to take the horizontal loads like wind and to transfer the vertical loads to the steel beams. Transversal beams are used in order to improve the transfer of the load equally to all the beams. To be sure that the bridge will take the load correctly we assure that the transversal beams work together and are connected to the main beams.

The concrete slab and the wall on each side of the bridge must be connected in order to transfer the horizontal loads. To make the connection easier and to assure a good cohesion between the transversal beams they will be weld with the main beam to create 5 big beams witch will be bolt in place. Firstly the entire loads go to the concrete deck. The concrete deck will be unidirectional and will carry the load to the main beams, which are used to carry the load to the foundation in each side of the bridge The transversal beams are used to assure a good repartition of the loads between the main beams. Concrete slab Edyta Stromydlo Robert Spiler Valentin Colle Samuel Faucon Loads, shear force and bending moment calculation Elements Traffic loads Project 43 Sizing of the main beams Bending moment verification Shear force verification Lateral buckling verification ULS SLS Deflection verification Sizing with the bending moment resistance Shear force resistance Lateral buckling resistance ULS SLS Deflection calculation Old bridge Loads Structure Propositions: - One arch - Two arches Traffic loads
-3 roadways
- two bicycle paths
- two pedestrian paths Wind loads
- no calculation
- principe Permanent loads:
self weight since 1934 concrete in poor conditions dimension: Final design Elements: Statical Model - Slabs

- Beams - Beams (precasted)

- Slabs (precasted)

- Bearing supports Beams statical analysis Concrete slab Main beams Transversal beams Joints - 3 load cases for punctual load: middle and each extremity of beams Steel elements: - beam design Influence line for beam 1 Thickness of slab: 22 cm Reinforcement Calculations: Resistance against punching for a wheel Shear force Joint between transversal beams Summary - steel is light and durable, so foundations can be lighter/smaller

- We can easly achieve span 25 meters without support in the middle

- steel elements are made in factories, which assurance high quality of elements Beam reinforcement Conclusion Both bridges have pros and cons
No economical analyze
Costumers/buyers choice After calculations, we have 12 barres of 40 millimeters. Concrete slab idea Cheap
Quality Plan 1 Plan 2 Design span between each support: L_t= 25 m
Width: - road: 10 m - Bicycle path: 2.2 m (each)
- Sidewalk: 2.7 m (each)
- Total: 19.80 m
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