الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A new structural concept - Double-Deck Cable Stayed Bridge - can be used to solve the problem of heavy traffic, while the number of pylons can not be increased due to the lack of ground spots needed to construct the pylons. Also, the Double Deck Cable Stayed Bridge is an economic solution if the construction of piers is a major cost factor. The pylon will support more than one deck. The Double-Deck Cable Stayed Bridge using Load Transfer Cells (LTC) will be presented in this research taking into consideration the requirements of design and construction. This thesis gives a historical review for many of the past constructed cable stayed bridges in some details, followed by description of cable stayed bridge components. The basic structural requirements for cable stayed bridges have been depicted. Verification of results has been done for a Cable Stayed Bridge for both static and modal analyses using two finite element softwares, those are STAAD PRO 2004 and STRAUS7. Initial shape of the Cable Stayed Bridge has been found by iterations using the STAAD PRO 2004 software. The dynamic behavior of the Double-Deck Cable Stayed Bridge under the action of dynamic load has been studied in vertical and transverse directions. This dynamic load is the time history of El Centra 5/19/1940, Imperial Valley. The dynamic load is used to prove the efficiency of the Load Transfer Cell (LTC). The LTC is used to connect the upper and lower decks together and to transfer the loads of the lower deck to the inclined cables supporting the decks. This proof is done by showing the strong interaction in both vertical and transverse directions between the nodes of the middle cross section of the Double-Deck Cable Stayed Bridge, followed by studying some parameters to recognize the behavior of the Double-Deck Cable Stayed Bridge. Also some useful comparisons are made between the behavior the proposed Double Deck Cable Stayed Bridge and some Single Deck Cable Stayed Bridges to evaluate the behavior of the new structure, including the aerodynamic behavior. .Suggestions and recommendations for future researches are presented.