bridge design project design of a link bridge over upper hanover street detailed design group n...
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Bridge Design ProjectBridge Design Project
Design of a Link Bridge over Upper Design of a Link Bridge over Upper Hanover StreetHanover Street
Detailed DesignDetailed Design
Group NGroup NChris JonesChris Jones
Ella FeekinsElla Feekins
Nikoline HongNikoline Hong
Aims and ObjectivesAims and Objectives
To provide a safe passage for pedestrians and To provide a safe passage for pedestrians and cyclists over Upper Hanover Streetcyclists over Upper Hanover Street
To reduce the use of road level pedestrian To reduce the use of road level pedestrian crossings, thus improving safety in the area and crossings, thus improving safety in the area and traffic flow at Brook Hill roundabout traffic flow at Brook Hill roundabout
To devise an elegant and sustainable design that To devise an elegant and sustainable design that will act as a landmark for the University of Sheffieldwill act as a landmark for the University of Sheffield
To provide a direct route between the major To provide a direct route between the major university developments university developments
LocationLocation
LocationLocation
Direct links to major university developmentsDirect links to major university developments
Does not impede on existing buildingsDoes not impede on existing buildings
Requires no permanent road closuresRequires no permanent road closures
Integrates an existing cycle routeIntegrates an existing cycle route
Requires a long span bridge solutionRequires a long span bridge solution
Cable-stayed BridgeCable-stayed Bridge
Cable-stayed BridgeCable-stayed Bridge
Landmark structureLandmark structure
Integrates into surrounding areaIntegrates into surrounding area
Provides vital links using multiple access Provides vital links using multiple access
pointspoints
Incorporates pedestrian footpaths, cycle Incorporates pedestrian footpaths, cycle
lanes and disabled access pointslanes and disabled access points
Ramp DesignRamp Design
EC3 designEC3 design
DeckDeck Simply supportedSimply supported
Typical span 8mTypical span 8m
Flexible end plate connections using M20 ‘hollo-bolts’Flexible end plate connections using M20 ‘hollo-bolts’
ColumnsColumns 203x203UC60 sections203x203UC60 sections
Simple connectionsSimple connections
Lateral stability provided by diagonal bracingLateral stability provided by diagonal bracing
Ramp Ramp DesignDesign
RAMP ELEVATION
Bridge DeckBridge DeckStatic AnalysisStatic Analysis
Loading:Loading: - Permanent:- Permanent: Self weight (including deck plate) Self weight (including deck plate)
- Imposed:- Imposed: 5kN/m2 5kN/m2
- Wind:- Wind: Max 0.8kN/m2 (acting transversely or in uplift) Max 0.8kN/m2 (acting transversely or in uplift)
Bridge DeckBridge Deck
Dynamic AnalysisDynamic Analysis Simplified modelSimplified model
No mode near pedestrian No mode near pedestrian
mode frequencies mode frequencies
ModeMode Natural Natural FrequencyFrequency
11 3.915 Hz3.915 Hz
22 5.548 Hz5.548 Hz
33 5.895 Hz5.895 Hz
Bridge DeckBridge Deck
Thermal AnalysisThermal Analysis TemperatureTemperature ExpansionExpansion
-18°C-18°C -12mm-12mm
20°C20°C 0mm0mm
85°C85°C 40mm40mm
Bridge deck requires a movement joint
Roller joint will be positioned at one support
TowersTowers
TowerTower Designed as 15m Designed as 15m
cantilever (concrete-cantilever (concrete-filled circular hollow filled circular hollow section)section)
Maximum bending Maximum bending moment 9000kNm moment 9000kNm at baseat base
Column tapers from Column tapers from 1500mm to 500mm, 1500mm to 500mm, 25mm wall 25mm wall thicknessthickness
No incline due to No incline due to space issuesspace issues
Cables and BaseCables and BaseCablesCables
Maximum cable tension 366kNMaximum cable tension 366kN
Tieback tension 2736kNTieback tension 2736kN
50mm diameter50mm diameter
High tensile strength steelHigh tensile strength steel
BasesBases Treated as 6m tall, reinforced concrete shell, around base of Treated as 6m tall, reinforced concrete shell, around base of
.. tower tower
Slab: 145 deep, T10 @ 250 centres (T8 @ 300 secondary)Slab: 145 deep, T10 @ 250 centres (T8 @ 300 secondary)
Beams: 500x200, 4T10 bars with T8 links @ 300 centresBeams: 500x200, 4T10 bars with T8 links @ 300 centres
Columns: 800x200, 4T10 bars with T8 links @ 300 centresColumns: 800x200, 4T10 bars with T8 links @ 300 centres
Assumed to act as an encastre joint for the towerAssumed to act as an encastre joint for the tower
ConstructionConstructionPhased constructionPhased construction
Construct reinforced concrete basesConstruct reinforced concrete bases Transport individual prefabricated deck sections to siteTransport individual prefabricated deck sections to site Install ramp columns, bracing and deck (giving safe access to Install ramp columns, bracing and deck (giving safe access to
tower bases)tower bases) Erect support towersErect support towers Connect deck sections in series and anchor support cables in Connect deck sections in series and anchor support cables in
towertower
Large cranes will be requiredLarge cranes will be required
Difficult to maintain two lanes of trafficDifficult to maintain two lanes of traffic
Temporary stability needs to be provided to bridge deck Temporary stability needs to be provided to bridge deck during constructionduring construction
SustainabilitySustainabilityEnvironmentalEnvironmental
Durable and low-maintenance designDurable and low-maintenance design Limited range of material optionsLimited range of material options
Locally source steel and concrete aggregateLocally source steel and concrete aggregate
Reduce transport and waste during constructionReduce transport and waste during construction Provides link to existing cycle pathProvides link to existing cycle path
SocialSocial Provides direct links to major university developmentsProvides direct links to major university developments Incorporates pedestrian footpaths, cycle lanes and disabled Incorporates pedestrian footpaths, cycle lanes and disabled
access pointsaccess points
EconomicEconomic High initial cost may be mitigated using advertisingHigh initial cost may be mitigated using advertising Low running costsLow running costs Encourages improvement in local economyEncourages improvement in local economy
ConclusionConclusion
Landmark Landmark StructureStructureProvides direct Provides direct linkslinksSocially inclusiveSocially inclusive