Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas
# ~, Y3 {0 K; c8 Z/ z% p
' ^/ e7 c4 |. a2 R/ v5 G Q; d' V' l0 \4 r' T$ F6 ?" |
ABSTRACT! B' J Q% G. p8 D$ w- ~% O
The purpose of this thesis is to provide insight into how different geometric parameters such as tower1 ]# d: X" m9 g; N7 L
height, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an
6 p1 Q e! @, T+ u) N- J) fextradosed bridge.4 m; | k6 N8 g- Z
A study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,
" V; Z W# n9 ]7 Qand compares their material quantities and structural characteristics to girder and cable-stayed bridges.
. [" B: D8 h+ f& I( W+ NThe strategies and factors that must be considered in the design of an extradosed bridge are discussed.
& A! P/ D* l! R wTwo cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed$ [8 x' P; u8 @9 t4 W- W0 x8 |
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural6 T2 p% ~$ \0 H+ }; \
behaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
8 b6 [% c6 ~# L$ A8 n+ @) \girder or in the piers of an extradosed bridge are both found to be effective stategies that lead to# q& \6 j& D2 p) D; o I0 D% P
competitive designs.5 y! \) Z& E: L- n1 ?" ~
6 i( S2 d2 t/ r1 D) D |