Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas1 q' k; \2 L: o7 q. O
* }$ b) E# k% K' @* x' L
5 X8 `/ _3 r, o; S& ]( |% y0 |ABSTRACT- N5 i0 T/ \5 t8 I) o) C1 r! Q
The purpose of this thesis is to provide insight into how different geometric parameters such as tower
4 p$ N- R5 Z! s6 |6 xheight, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an& k# Y) P: D# `
extradosed bridge.
! ^8 N! s- s! |5 [% RA study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,
0 \ P( J! }1 x6 H# t1 f( Cand compares their material quantities and structural characteristics to girder and cable-stayed bridges.6 r5 {' a- D% f9 P
The strategies and factors that must be considered in the design of an extradosed bridge are discussed.+ V9 N% Z+ [( m+ y7 L
Two cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed2 Z' U ~3 D5 A( d1 r/ U" j4 o7 f
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural1 |. j0 e2 K" Y4 `
behaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
- @( b. q* Q/ T* h% Ogirder or in the piers of an extradosed bridge are both found to be effective stategies that lead to
/ X) R; C$ E# r2 A6 acompetitive designs.6 K( e, ~# m* D' z
- x( i, W( @2 G- q$ i; U6 T |