| Summary: | 碩士 === 淡江大學 === 土木工程學系碩士班 === 99 === A self-anchored cable-stayed suspension bridge, including main girder, tower, main cable, stayed cables and vertical hangers, is characterized by its elegant structural shape. It possesses combines merits of both a self-anchored suspension bridge and a cable-stayed bridge, which forms a totally renewed structure mechanism. This research intends to analyze and investigate the static-wind-induced response of a self-anchored combined cable-stayed suspension bridge. The main contents and outcomes of this research are as follows.
This research established the numerical models and performed the detailed analysis to investigate the characteristics of wind-induced response of self-anchored cable-stayed suspension bridge. The ANSYS program is used to analyze and investigate the wind-induced response of a self-anchored cable-stayed suspension bridge under the action of design static wind and static wind with different velocity. The impact of the variations of stiffness of sub-structures and geometric shape on the wind-induced response of a self-anchored cable-stayed suspension bridge are also analyzed and investigated in this research. This results have shown that, when the stiffness was varied, the main cable has the greatest impact on the wind-induced response of self-anchored cable-stayed suspension bridge. However, when the geometric shape was varied the auxiliary piers has the greatest impact on the wind-induced response of self-anchored cable-stayed suspension bridge.
Finally, this research used the response surface approach method to perform the influence of the uncertainties of material to the wind-induced response of self-anchored cable-stayed suspension bridge. The influence of the uncertainties of material to the structures deflection and sub-structures moment of self-anchored cable-stayed suspension bridge under static-wind load were also investigated as well. The results have shown that the response surface approach method is an effective method for the stochastic analysis of the suspension bridge.
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