Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas B( ?- n$ [+ g! A. B8 r
8 p8 ]: |/ W* h7 ^' N8 X
: N- t( f2 d' T) [ABSTRACT- T6 {9 P0 e D0 [$ o0 R* k3 i
The purpose of this thesis is to provide insight into how different geometric parameters such as tower( y+ q: c& G& b6 _1 B
height, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an) _: q6 C: K0 G4 U& x
extradosed bridge.
) r: z" D' E+ H, ~! ^9 \5 o0 N PA study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,
4 R4 Q) k3 G" b) j: qand compares their material quantities and structural characteristics to girder and cable-stayed bridges.
, R' h: d/ h# e6 c: E0 d# a" }4 ZThe strategies and factors that must be considered in the design of an extradosed bridge are discussed.
- K0 F% ~* R( iTwo cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed3 K5 u* `( e/ ~: W( p# k# ^/ ~/ q
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural
9 u# H7 [2 e9 W, k/ Z' Gbehaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
0 M6 r3 M! |0 L/ y, G3 r2 f: q, O9 U" sgirder or in the piers of an extradosed bridge are both found to be effective stategies that lead to
% g8 M; c2 i: j- V( `+ @competitive designs.2 B+ e! S: p( f3 ?0 e% H; y: `9 F3 `. n
# x. u( h5 ~1 {* e" ~6 y |