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Puente del Campo Volantin (Campo Volantin Bridge) Model Analysis: The bridge ʼ s secondary name is “Zubizuri” which in the basque language means “whitebridge”, a tied arch footbridge designed across the Nervion River in Bilbao, Spain bySantiago Calatrava and offers pedestrians a convenient route from hotels to the nearbyBilbao Guggenheim Museum designed by Frank Ghery. The bridge start being build in1990 and has ben finished in 1997.As the designer remark the bridge is famous for it ʼ s graceful curving glass-decked footdock. Not as the last like in other designs by Santiago Calatrava, an apparentdisequilibrium or rather sad, a sense of frozen movement is heightened by the lightness ofthe structure.The bridge design consists of an inclined structural steel arch linking two platforms, withaccess ramps and stairways on both banks. The curved steel bridge deck is suspended bysteel cables.Even if the bridge have a remarkable architectural presence the usability isn ʼ t reallyremarkable. The bridge it is locally infamous for the glass bricks set into its floor, which canbecome slippery in the wet climate of the city. The srcinal design connects the bridge onthe left bank to the Uribitarte dock and not to the higher street Alameda Mazarredo. Localauthorities temporarily installed a further scaffolding footway joining the bridge andMazarredo street, but removed it under protests from Calatrava. From 2006 until now thereare many legal discussions between Santiago Calatrava and the local authorities due tomany slips and falls of bridge users and the cost of replacing broken glass tiles reached6,000 euros in the last year and 250,000 euros in ten years, according to a municipalreport.The main structural component is a steel arch, 75m long, 15m height with a 75m span. Dealing with a inclined parabolic tied arch pedestrian bridge which utilizes steel in it ʼ s maincomponent, we made our case study model at the scale of 1:750 and we decide to chosethe following materials: ComponentMaterialYoung ʼ s Modulus, E in KN/mm2Remarks Main Structure[Tie Beam]Steel rod( ∅ 21mm)200These steel rodswere selected toimitate strength anddeflection propertiesof the real bridge.Parabolic ArchPVC pipe reinforcedwith Al. rod( ∅ 12mm)80The decision tochoose PVC pipe isbecause of itsflexibility to bebended. To maintainthe bridge ʼ s Young ʼ sModulus, aluminumrods were insertedinto the hollow PVCpipes asreinforcement.T-Section BeamsSections of steelplates200These steel plateswere selected toimitate strength anddeflection propertiesof the real bridge.SuspendedSteel CablesNylon string (8 lbs.load carryingcapacity)15Nylon strings havethe springy propertythat may imitate thereal movement anddeflection on thebridge when load isimposed.Glass deckingNot shownNot calculatedThe glass decking(foot path) is notshown because it isa non-structuralcomponent.We pick our materials really carefully and from these selections we assumed that our testmodel could imitate the real bridge ʼ s strength and deflection.After intense internet research we manage to find some relevant informations anddimensions of the real bridge and we start making the first model of the bridge, the one atthe 1:750 scale. Below we present the drawings which we made from the gathered information, to startdesigning our model. PLAN - using 1:750 scale measured by ratio, but BASED on imageDWG measures, its estimate to be maybe a 1:800 scale DWGSECTION - 1:1250 DWG scale, a close-estimated diagramz From these series of drawings, we made the first scale model of the bridge, scale 1:750.The timber frame and base for the scale model was constructed to make the load testingeasier. They do not hold any structural significance to the scale model.
