Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas$ E7 s/ R$ K/ g" e8 J; A a, M
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" E1 F, Y3 w3 a& ]ABSTRACT
0 e0 u3 \5 a( d DThe purpose of this thesis is to provide insight into how different geometric parameters such as tower
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extradosed bridge.
0 h, H0 S7 v7 p/ W9 GA study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,# f: E. t/ r; j, N
and compares their material quantities and structural characteristics to girder and cable-stayed bridges. C5 i; h5 y$ c3 Z/ r5 s
The strategies and factors that must be considered in the design of an extradosed bridge are discussed. d# W9 i/ p! r0 @- w6 G
Two cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed7 H! u+ G m" D, m
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural
! V" S1 Y0 A, kbehaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the0 f. L/ f3 P" r5 k& {( F+ y6 i% `$ l
girder or in the piers of an extradosed bridge are both found to be effective stategies that lead to
7 ^/ z. h$ C9 ~: I) ucompetitive designs.. i7 T4 Y' Z' w( P' E' f. g
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