1. Group N Chris Jones Ella Feekins Nikoline Hong
Bridge Design Project Design of a Link Bridge over Upper Hanover Street Detailed Design
Group N
Chris Jones
Ella Feekins
Nikoline Hong

2. Aims and Objectives
To provide a safe passage for pedestrians and cyclists over Upper Hanover Street
To reduce the use of road level pedestrian crossings, thus improving safety in the area and traffic flow at Brook Hill roundabout
To devise an elegant and sustainable design that will act as a landmark for the University of Sheffield
To provide a direct route between the major university developments

3. Location

4. Location Direct links to major university developments
Does not impede on existing buildings
Requires no permanent road closures
Integrates an existing cycle route
Requires a long span bridge solution

5. Cable-stayed Bridge

6. Cable-stayed Bridge Landmark structure
Integrates into surrounding area
Provides vital links using multiple access points
Incorporates pedestrian footpaths, cycle lanes and disabled access points

7. Ramp Design EC3 design Deck Columns Simply supported Typical span 8m
Flexible end plate connections using M20 ‘hollo-bolts’
Columns
203x203UC60 sections
Simple connections
Lateral stability provided by diagonal bracing

8. Ramp Design
RAMP ELEVATION

9. Bridge Deck Static Analysis Loading:
- Permanent: Self weight (including deck plate)
- Imposed: 5kN/m2
- Wind: Max 0.8kN/m2 (acting transversely or in uplift)

10. Bridge Deck Dynamic Analysis Simplified model
No mode near pedestrian mode frequencies
Mode
Natural Frequency 1
3.915 Hz 2
5.548 Hz 3
5.895 Hz

11. Bridge Deck Thermal Analysis Bridge deck requires a movement joint
Temperature
Expansion
-18°C
-12mm
20°C
0mm
85°C
40mm
Bridge deck requires a movement joint
Roller joint will be positioned at one support

12. Towers
Tower
Designed as 15m cantilever (concrete-filled circular hollow section)
Maximum bending moment 9000kNm at base
Column tapers from 1500mm to 500mm, 25mm wall thickness
No incline due to space issues

13. Cables and Base Cables Bases Maximum cable tension 366kN
Tieback tension 2736kN
50mm diameter
High tensile strength steel
Bases
Treated as 6m tall, reinforced concrete shell, around base of tower
Slab: 145 deep, 250 centres 300 secondary)
Beams: 500x200, 4T10 bars with T8 300 centres
Columns: 800x200, 4T10 bars with T8 300 centres
Assumed to act as an encastre joint for the tower

14. Construction Phased construction Large cranes will be required
Construct reinforced concrete bases
Transport individual prefabricated deck sections to site
Install ramp columns, bracing and deck (giving safe access to tower bases)
Erect support towers
Connect deck sections in series and anchor support cables in tower
Large cranes will be required
Difficult to maintain two lanes of traffic
Temporary stability needs to be provided to bridge deck during construction

15. Sustainability Environmental Social Economic
Durable and low-maintenance design
Limited range of material options
Locally source steel and concrete aggregate
Reduce transport and waste during construction
Provides link to existing cycle path
Social
Provides direct links to major university developments
Incorporates pedestrian footpaths, cycle lanes and disabled access points
Economic
High initial cost may be mitigated using advertising
Low running costs
Encourages improvement in local economy

16. Conclusion
Landmark Structure
Provides direct links
Socially inclusive