| Summary: | 碩士 === 逢甲大學 === 土木工程學系 === 106 === In the modern era of thriving technology, Along with the rapid calculation of computers, the improvement of the human quality concept of living; coupled with the needs of transportation, the need for aesthetic design, the use of new materials, and the consideration of the limitations and requirements of the project site. Traditional bridges have to be modernized with the advantages of long spans, landscaping, and economics.
In the current 「Standard Specification for Highway Bridges」(AASHTO) (1996) D. , for special bridges such as suspension bridges, cable-stayed bridge, truss bridges, movable bridges or temporary bridges, and those with a span of more than 150 meter, except those applicable to this specification, It should be considered for its particularity. This thesis will focus on the particularity of the tied arch bridge mentioned in the specification, as well as the cooperation between the pre-camber design of the bridge and the pre-stress of the cable in the initial design steps of the tied arch bridge.
For the cooperation between the pre-camber design of the bridge and the pre-stress of cable, the following three conditions are set, the cable does not apply extra pre-stress, the deflection caused by the dead load is completely eliminated by the pre-camber design of the bridge. Completely by the pre-stress of cable to eliminate the deflection. The pre-stress of cable to interact with the pre-camber design of the bridge to eliminate the deflection. Then the finite element software is used to model and analyze the force process of the whole bridge component. The tension value is calculated through iteratively calculated according to the target value of the cable force. Verifying whether the cable force of the whole bridge matches the target value. Checking if the bridge component working stress to allowable stress ratio is within the safety requirements.
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