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Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas6 t% `4 k8 A, _! p0 N
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) `& h; R/ v8 z. b5 f. KABSTRACT3 ?* ]3 Z5 Z+ X. B; X5 D
The purpose of this thesis is to provide insight into how different geometric parameters such as tower$ ^. [/ g h! S! E' R
height, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an
# y! e, O) [, Bextradosed bridge.
5 C8 b3 L& h D2 u+ bA study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,. J2 v/ ]1 p$ {) i' L
and compares their material quantities and structural characteristics to girder and cable-stayed bridges.
2 Q7 d7 j6 O3 f# Y! S3 J0 lThe strategies and factors that must be considered in the design of an extradosed bridge are discussed.
/ f$ F1 X* B# T5 ZTwo cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed
) J h6 u1 g) W# w4 `! Ubridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural
9 j$ C' _% y6 g( S0 pbehaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
8 _' f# H' b: }7 b# a" rgirder or in the piers of an extradosed bridge are both found to be effective stategies that lead to V7 S9 C/ ?' J4 Q- ]5 Y
competitive designs.* Y; T( M) _/ [1 p# {2 E" g- f
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