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Steel and Composite Structures
  Volume 12, Number 5, May 2012, pages 413-426

Construction stage analysis of three-dimensional cable-stayed bridges
Barbaros Atmaca and Sevket Ates*

    In this paper, nonlinear static analysis of three-dimensional cable stayed bridges is performed for the time dependent materials properties such as creep, shrinkage and aging of concrete and relaxation of cable. Manavgat Cable-Stayed Bridge is selected as an application. The bridge located in Antalya, Turkey, was constructed with balanced cantilever construction method. Total length of the bridge is 202 m. The bridge consists of one e shape steel tower. The tower is at the middle of the bridge span. The construction stages and 3D finite element model of bridge are modeled with SAP2000. Large displacement occurs in these types of bridges so geometric nonlinearity is taken into consideration in the analysis by using P-Delta plus large displacement criterion. The time dependent material strength and geometric variations are included in the analysis. Two different finite element analyses carried out which are evaluated with and without construction stages and results are compared with each other. As a result of these analyses, variation of internal forces such as bending moment, axial forces and shear forces for bridge tower and displacement and bending moment for bridge deck are given with detailed. It is seen that construction stage analysis has a remarkable effect on the structural behavior of the bridge.
Key Words
    manavgat cable-stayed bridge; construction stage analysis; time dependent material properties; 3d finite element model; balanced cantilever method
Karadeniz Technical University, Department of Civil Engineering, 61080, Trabzon, Turkey

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