| Summary: | 碩士 === 逢甲大學 === 土木工程所 === 98 === Bridge is a structure for the road users in response to topographic change or to cross obstacles. There are many bridge types selection. However, the pre-stress concrete bridge was most popular and cost-effective. The type choice of bridge superstructure is affected by the factors such as safety of construction method, cost and duration…etc.. Therefore, how to select and adopt an appropriate bridge superstructure construction method to make road users safer and more assured has long been the important mission of bridge designer and civil engineer.
There are 35 nos. documents were collected related to the construction methods of pre-stressed I-beam bridge, steel arch bridge, steel I beam bridge, steel box girder bridge and composite bridge…etc. which are mostly modular systems and were widely adopted at domestic road construction. It is categorized that the structure type, bridge distance, bridge width, span, work site topography and environment of each construction method. The non-applicable of constraint factors for construction method adoption were also summarized as the fitness evaluation.
In view of present global warming issue and in response to the promotion of design concept of environmental protection, "Green Camp” by the Public Construction Commission Executive Yuan and "Green Building" by the Construction and Planning Department, the steel bridge can be one of the selection for superstructure construction method.
It is difficult to identify the advantages and disadvantages and assess the life cycle cost objectively among the construction methods in the past. Therefore, this study collected the cost data of steel bridges and pre-stress concrete bridges from design units and construction units and interviewed with experts to understand the bridge characteristics with different materials to conduct quantitative cost analysis. This bridge selection model can be used for the construction units or design units on bridge type selection and the preparation of construction budget.
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