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Deck slab bridge

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Analysis and designing of deck slab bridge: steps to plan and construct a bridge to the steps related to the designing

Published in: Engineering
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Deck slab bridge

  1. 1. DESIGN & ANALYSIS OF DECK SLAB BRIDGE PRESENTED BY:PRESENTED BY: ANIMESHANIMESH
  2. 2. Purpose Of BridgePurpose Of Bridge A bridge is a structure providing passageA bridge is a structure providing passage over an obstacle without closing the wayover an obstacle without closing the way beneath.beneath. The required passage may be for a road, aThe required passage may be for a road, a railway, pedestrians, a canal or a pipeline.railway, pedestrians, a canal or a pipeline. The obstacle to be crossed may be a river, aThe obstacle to be crossed may be a river, a road, railway or a valley.road, railway or a valley.
  3. 3. Components ofComponents of Bridge StructureBridge Structure
  4. 4. PLANNING FORPLANNING FOR BRIDGEBRIDGE
  5. 5. DATA COLLECTIONDATA COLLECTION Location of bridge site.Location of bridge site. Transportation of bridge site.Transportation of bridge site. Nature of crossing and affordability.Nature of crossing and affordability. Availability of local material.Availability of local material. Traffic volume.Traffic volume. Availability of local bridge builders.Availability of local bridge builders. Temporary crossing.Temporary crossing. Local participation.Local participation.
  6. 6. ANALYSIS OF DATAANALYSIS OF DATA
  7. 7. SHORTEST DISTANCESHORTEST DISTANCE FOR THE BRIDGEFOR THE BRIDGE To construct a bridge the first part ofTo construct a bridge the first part of analysis is to decide the shortest routeanalysis is to decide the shortest route for the bridge from starting point to thefor the bridge from starting point to the end point. & whether it is necessary &end point. & whether it is necessary & economical to construct a bridge. In thiseconomical to construct a bridge. In this part of analysis, curves ends of river arepart of analysis, curves ends of river are excluded so as the distance will decreaseexcluded so as the distance will decrease between the ends of bridge unless therebetween the ends of bridge unless there is no other plan is possible for the bridge.is no other plan is possible for the bridge.
  8. 8. ECONOMICAL SPANECONOMICAL SPAN Economic SpanEconomic Span Depend UponDepend Upon The Cost Of:The Cost Of: SubstructureSubstructure SuperstructureSuperstructure
  9. 9. SCOUR DEPTHSCOUR DEPTH Depth of scour belowDepth of scour below the High Flood Levelthe High Flood Level Scour depth hasScour depth has importance inimportance in determination of depth ofdetermination of depth of foundationfoundation If mean score depth isIf mean score depth is ‘d’, then max scour depth‘d’, then max scour depth for piers is ‘2d’for piers is ‘2d’ The depth which is produced due to the scouring action ofThe depth which is produced due to the scouring action of water.water.
  10. 10. VERTICALVERTICAL CLEARANCECLEARANCE Minimum verticalMinimum vertical clearance of 5m should beclearance of 5m should be ensure over the full width ofensure over the full width of roadway.roadway.  The vertical clearanceThe vertical clearance should be measured withshould be measured with regard to the highest pointregard to the highest point of carriageway.of carriageway. Allowance for any futureAllowance for any future raising of pavement is alsoraising of pavement is also be made.be made.
  11. 11. TRAFFICTRAFFIC PROJECTIONPROJECTION Analysis of traffic is alsoAnalysis of traffic is also necessary for the bridgenecessary for the bridge designing. Traffic projectiondesigning. Traffic projection defines the amount of trafficdefines the amount of traffic passing through the bridge. Thispassing through the bridge. This helps in estimating the type ofhelps in estimating the type of loading. Sometimes in case ofloading. Sometimes in case of emergency the amount of trafficemergency the amount of traffic increases so that a sufficient spaceincreases so that a sufficient space is provided for the vehicles to gois provided for the vehicles to go through the bridge without facingthrough the bridge without facing any problems.any problems.
  12. 12. SELECTION OFSELECTION OF BRIDGE TYPEBRIDGE TYPE •Geometric condition of the site(road alignment, design flood andGeometric condition of the site(road alignment, design flood and highest water mark)highest water mark) •Traffic capacity.Traffic capacity. •Structural stability.Structural stability. •Foundation conditions and strength of a abutment.Foundation conditions and strength of a abutment. •Available material.Available material. •Knowledge and equipment of the contractor.Knowledge and equipment of the contractor. •Clearance requirement above and below the road way.Clearance requirement above and below the road way. •General requirements with respect to location ,financing andGeneral requirements with respect to location ,financing and community values.community values.
  13. 13. What is deck slabWhat is deck slab bridge?bridge? •A bridge with an upper horizontal beams that carriesA bridge with an upper horizontal beams that carries Roadway or Railway is known as ‘Deck’ of theRoadway or Railway is known as ‘Deck’ of the Bridge.Bridge. •In Deck Slab Bridges, the deck itself is the structuralIn Deck Slab Bridges, the deck itself is the structural frame or the entire deck is thin beam acting entirelyframe or the entire deck is thin beam acting entirely as one primary member. These types are used whereas one primary member. These types are used where the depth of structure is critical factor.the depth of structure is critical factor. •A slab deck is one where the deck is analyzed as aA slab deck is one where the deck is analyzed as a plate. If the slab has the different stiffness in twoplate. If the slab has the different stiffness in two directions right angle to each other, the bridge isdirections right angle to each other, the bridge is analyzed as the orthotropic deck and the bridge isanalyzed as the orthotropic deck and the bridge is known to be the Deck Slab Bridge.known to be the Deck Slab Bridge.
  14. 14. Deck slab bridgeDeck slab bridge
  15. 15. BRIDGES-BRIDGES- STRUCTURALSTRUCTURAL DESIGNDESIGN
  16. 16.  Dead loadsDead loads  Centrifugal ForcesCentrifugal Forces  Live LoadsLive Loads  Live Load SurchargeLive Load Surcharge  Snow LoadsSnow Loads  BuoyancyBuoyancy  Impact & dynamic LoadsImpact & dynamic Loads  Temperature EffectsTemperature Effects  Earth PressureEarth Pressure  Deformation EffectsDeformation Effects  Vehicle Collision LoadsVehicle Collision Loads  Secondary EffectsSecondary Effects  Wind LoadsWind Loads  Seismic forcesSeismic forces  Impact Due to Floating BodiesImpact Due to Floating Bodies  Wave PressureWave Pressure  Water CurrentsWater Currents  Grade EffectsGrade Effects
  17. 17. THANK YOUTHANK YOU TO BE CONTINUED…TO BE CONTINUED…

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