الفهرس 
INTRODUCTION TO CABLE-STAYED BRIDGESOnly 14 pages are availabe for public view
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Abstract
thesis introduces an extensive survey on different published works concerning general
concepts, systems and structural analysis methodologies of different Jong-span bridge types. A
proposed analytical procedure for calculating the fundamental dynamic properties of contemporary,
long-span cable-stayed bridge schemes, is developed by incorporating the effect of different
structural countermeasures, for extending the span limits of cable stayed bridges, such as:
adopting partially earth anchored schemes, and forming cable net systems composed of secondary sag
cables in addition to the main stay-cables. The algorithm of the developed procedure is based on
introducing geometric, material, and stiffness parameters that take the effect of these
state-of-the art concepts and systems into account, within the primary dynamic equations.
Verification of the developed procedure is shown by several comparisons with numerical results of
three dimensional finite element bridge models and with the measured results of existing
cable-stayed bridges. It is revealed that the proposed algorithm is much more sensitive than all
other previous procedures in capturing the dynamic characteristics of the tested models and
existing bridges. An extensive nonlinear static analysis is performed for assessing the nonlinear
characteristics of extremely long-span cable stayed bridges and for deducing the most economical
statical system and cable configuration for achieving cable-stayed bridges having main spans
reaching 1400m. The effect of modem traffic loads on the static performance of the studied
long-span bridges is assessed. A detailed study is presented for calculating the optimum seismic
isolation stiffness and strength design parameters for long-span cable-stayed bridges. Recommended,
general form, equations are presented for calculating the elastic and post elastic seismic
isolation design parameters of different cable-stayed bridges. These proposed equations are
validated by comparison with the actual seismic isolation bearing characteristics of existing
bridges. An extensive study is presented for the determination of the seismic response, of 1400m
main span, cable-stayed bridges by the application of all seismic provisions recommended in
different recent international codes and standards. The non linear time history response results of
the different cable stayed bridge systems due to actual, severe, ground motions are evaluated.
Finally, the results of the whole study are summarized and conclusions are drawn.