|
Behaviour and Design ofEXTRADOSED BRIDGESbyKonstantinos Kris Mermigas
( r* h: ~. `( \# [1 ~' \) X4 n$ `- A2 x2 X
+ b# ^3 ~7 ?" R' g1 h
ABSTRACT& T; b/ L. {. G/ Y. n4 D8 ?
The purpose of this thesis is to provide insight into how different geometric parameters such as tower! ^9 e; a# ]$ c6 T6 g, j
height, girder depth, and pier dimensions influence the structural behaviour, cost, and feasibility of an( ]# n+ n$ D3 d9 V) X2 x% P
extradosed bridge.; ]4 c/ D7 d2 k" s, c
A study of 51 extradosed bridges shows the variability in proportions and use of extradosed bridges,
0 o9 s) A) ~' \8 X! @and compares their material quantities and structural characteristics to girder and cable-stayed bridges.
* b( C2 \. y$ U+ r4 m8 P! a# QThe strategies and factors that must be considered in the design of an extradosed bridge are discussed.
- f. a0 ]; U; ?- Z# ?Two cantilever constructed girder bridges, an extradosed bridge with stiff girder, and an extradosed
% M& q0 I" y' ~& i' Bbridge with stiff tower are designed for a three span bridge with central span of 140 m. The structural
7 \! t' P- q0 ]. C1 y! r) \behaviour, materials utilisation, and costs of each bridge are compared. Providing stiffness either in the
6 Y2 T% Z q" ?& P9 m/ mgirder or in the piers of an extradosed bridge are both found to be effective stategies that lead to; p l- R& j/ u
competitive designs.1 {! Q; A1 q3 N
l e; ?- r9 O3 i( W9 i6 f8 P; l | 
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡
