Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas0 [, A, `5 i, Y3 Y) H2 t# |
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; I. q p+ F0 c4 E6 G! AABSTRACT
5 s- h( r6 p% ^6 SThe purpose of this thesis is to provide insight into how different geometric parameters such as tower( c! _" P- f' [$ G! d0 U
height, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an$ K6 p" g$ Z$ |+ N. m
extradosed bridge.. t8 ^* B& z# T2 D* e
A study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,4 F% N9 q1 v0 T, [
and compares their material quantities and structural characteristics to girder and cable-stayed bridges.
, u# `4 d0 ~1 t1 H$ f3 rThe strategies and factors that must be considered in the design of an extradosed bridge are discussed.
) E2 s* e; T! o. ITwo cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed# e9 Y/ F( n7 {
bridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural" [" _ o7 ~& T7 H, h1 \
behaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
: I6 Z4 b/ |' ]1 x6 g4 P) k1 J6 Vgirder or in the piers of an extradosed bridge are both found to be effective stategies that lead to% y7 C" B0 A1 p# y7 |: B- _
competitive designs.
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