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Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas9 W: f. v+ S. q* {# }
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ABSTRACT& {% q' e* {8 Q U
The purpose of this thesis is to provide insight into how different geometric parameters such as tower
" u3 B2 n3 Q+ u7 Hheight, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an
& \7 q( x. @' W$ X ?$ mextradosed bridge.
% Z* {! a! z2 WA study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,
8 ^/ m8 ?5 x5 s' W, G$ mand compares their material quantities and structural characteristics to girder and cable-stayed bridges.) y/ j. _1 z4 u* y3 A, ^
The strategies and factors that must be considered in the design of an extradosed bridge are discussed.
4 l9 {2 j2 v2 k6 p" ]; X& MTwo cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed- h1 ?- j/ R: S$ l2 V6 N+ G0 W( O
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural
6 M8 _7 G# h! l% h- `* Obehaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
; T7 x1 V" B, P( \girder or in the piers of an extradosed bridge are both found to be effective stategies that lead to" t4 g) b |& g' q
competitive designs.
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