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Bridges *Beam Arch Suspension
Bridges Beam *Arch Suspension
Bridges Beam Arch *Suspension
Forces Managed by Bridges Compression pushes inward or toward the object’s center Tension pulling or stretching force
Valley Fair Wild Thing I Beam Construction Building the Empire State Building Video
Wabasha Street Bridge St Paul, Minnesota Spanning the Mississippi Cantilever deck truss Beam Bridge 1890
PRATT QUADRANGULAR WARREN CURVED CHORDPRATT SUBDIVIDED WARRENTYPEs BALTIMORE PENNSYLVANIA(PRATT) WARREN W/O VERTICALSUPPORTS LATTICE WARREN WITH VERTICALSUPPORTS WHIPPLE
Catenary Arch Curve of idealized hanging chain when supported at its ends. Acted on only by its own weigh
Euler proved in 1744 that the catenary is the curve which, when rotated about the x-axis, gives the surface of minimum surface area (the catenoid) for the given bounding circle. http://mathworld.wolfram.com/Catenoid.html
Arch Bridge • Semicircular structure • Rigid span • Curving upward between two points of support • Transfers the weight of the bridge and its load partially into a horizontal thrust • Horizontal thrust is restrained by the abutments at either side
The Arkadiko Bridge in Greece Built 13th century BC One of the oldest arch bridges in existence
Stone Arch Roman Bridge of Córdoba, Spain. Built in the 1st century BC
The keystone is the most important stone in an arch bridge, without this stone the arch would collapse. The keystone holds the arch together.
Gothic Arch • Construct AB. • Set compass to AB • With compass at point B, construct arc AC. • With compass at point A, construct arc BC. Main portal Notre Dame, Paris
JuscelinoKubitschek Bridge in Brasilia, Brazil Arch Suspension Hybrid Bridge
Suspension Bridge Ted Talk
Suspension Bridge • the force exerted is uniform with respect to horizontal distance • the result is a parabola
How compelling is the need of humans to be able to move across their world?
Tacoma Narrows Bridge Gallopin’ Gertie
Swing: Government BridgeLock and Dam #15 Across Mississippi
GatesheadMillenium Bridge Gatehead
Magdeburg Water Bridge Falkirk Wheel