FINITE ELEMENT ANALYSIS OF SINGLE PLANE: CABLE- STAYED BRIDGES UNDER CONSTRUCTION BY CANTILEVERING METHOD I
UESHAM EL-SA YED NOUn EL-DEEN OTHMAN;
Abstract
Tills thesis is devoted to the tlU'ee-dimensionalnonlinear static behaviow• of single-plane cable-stayed bddges nnder construction by the cantileveiing method. The study may be divided into four pa1ts.
Firstly, the vaiions methods of construction of cable-stayed bddges are presented briefly. The cantilevedng method is discussed in details, pointing out to its advantages. Also, the installation procedw•es for the prestressing cables as well as the stay cables are explained.
Secondly, the static structural behaviour of single-plane cable-stayed bridges is presented. The main previous methods of analysis are reviewed.
Thirdly, a new geometiic nonlinear finite element fmmnlation is deiived. Tills fmmulation is devoted to the second-order behaviour of a two-node thin walled beam-colulllll element with seven degrees oflieedom at each node. Theses seven degrees of Jieedom are: three displacements, tJu•ee rotations and the warping of the cross section. The f01mulation is based on the theory of torsional-flexural behaviour.
The nonlinear behaviour of a stay cable element is also discussed. The effect of the pretensioning force is included in the analysis.
Based on the de1ived sti.Jfuess rnatdces, a computer program is presented. The el.inlination method using the sparse rnatlices technique is used to solve the rnahix equations aiising during the analysis of the structme by the finite element
method.
The new method and the computer program are verified. Several examples available in the literature are solved, using the present method, for the sake of compuison.
Firstly, the vaiions methods of construction of cable-stayed bddges are presented briefly. The cantilevedng method is discussed in details, pointing out to its advantages. Also, the installation procedw•es for the prestressing cables as well as the stay cables are explained.
Secondly, the static structural behaviour of single-plane cable-stayed bridges is presented. The main previous methods of analysis are reviewed.
Thirdly, a new geometiic nonlinear finite element fmmnlation is deiived. Tills fmmulation is devoted to the second-order behaviour of a two-node thin walled beam-colulllll element with seven degrees oflieedom at each node. Theses seven degrees of Jieedom are: three displacements, tJu•ee rotations and the warping of the cross section. The f01mulation is based on the theory of torsional-flexural behaviour.
The nonlinear behaviour of a stay cable element is also discussed. The effect of the pretensioning force is included in the analysis.
Based on the de1ived sti.Jfuess rnatdces, a computer program is presented. The el.inlination method using the sparse rnatlices technique is used to solve the rnahix equations aiising during the analysis of the structme by the finite element
method.
The new method and the computer program are verified. Several examples available in the literature are solved, using the present method, for the sake of compuison.
Other data
| Title | FINITE ELEMENT ANALYSIS OF SINGLE PLANE: CABLE- STAYED BRIDGES UNDER CONSTRUCTION BY CANTILEVERING METHOD I | Other Titles | استخدام نظرية العناصر المحددة لتحليل الكبارى الملجمة بمستوى واحد من الكابلات اثناء الانشاء بطريقة الكوابيل | Authors | UESHAM EL-SA YED NOUn EL-DEEN OTHMAN | Issue Date | 1997 |
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