台灣地形複雜，為了跨越這些複雜的地形，已經建置了許多道路橋梁提供順暢的交通網路，近年來氣候變異以及車流量劇增，增加的外在影響因子超越橋梁設計承載力，國內橋梁面臨損壞或劣化嚴重的問題，以及維護經費有限或不足，需在有限經費狀況下擬定最佳維護策略，使得構件能維持良好安全狀況，達到經費運用最有效率以及安全最高的目標，因此建立有效之橋梁維護最佳化模式為近年橋梁管理著重的重點之一。
　　本研究提出多目標橋梁模糊最佳化維護策略模式，其多目標分別為「最小化維護總成本」、「最大化橋梁之狀況指標值」以及「最小化共同維護次數」，「最小化維護成本」目標式用於尋找花費最小且橋梁構件狀況值仍大於安全門檻之維護策略；「最大化狀況指標值」目標式用於尋找可保持橋梁構件遠高於安全門檻之維護策略，使得橋梁有最高的安全性；「最小化共同維護次數」用於尋找對用路人影響最小之維護策略，本研究將針對以上目標提出最佳化模式，並針對不同的目標組合進行試算。
　　過去橋梁維護相關文獻通常不考慮橋梁維護的不確定因素，而採取確定值進行模擬推估維護策略，但本研究認為，橋梁構件劣化狀況因橋梁所處地區氣候、車流量狀況每年皆不同，構件劣化率將因以上外在狀況而包含非常多不確定因素，故研究將傳統明確劣化率結合模糊理論並加以擴展，使用模糊最佳化技術協助橋梁工程師分析橋梁風險狀況下維護時間點以及採取之維護策略。

The terrain is complicate in Taiwan. For across those complicate terrain, there are many bridges around the island to provide smooth traffic network. In recent year, atmosphere and traffic volume change a lot, those outside effective already let bridges overload. Internal bridges face to serious deterioration problem and few maintenance budget or strict budget limit. How to make best maintenance strategies that keeps bridge in well safety situation and using bridge maintenance budget effectively. To build effective bridge maintenance optimization model is the best way to solve the problem.
The research proposed a bridge fuzzy multi-objective optimization model. The objectives are “minimize rehabilitation cost in service period”, “maximize bridge condition index in service period” and “minimize concurrent maintenance times in service period”. The first objective “minimize rehabilitation cost in service period” used to find rehabilitation strategies combinations that costs minimize rehabilitation cost and keeps the bridge components index higher than safety level. Second objective “maximize bridge condition index in service period” used to find a rehabilitation strategies combinations that make bridge components in high safety situation. Third objective “minimize concurrent maintenance times in service period” used to find rehabilitation combinations that has less effective with users and minimize user cost.
In the past, bridge rehabilitation references usually didn’t consider bridge rehabilitation uncertainty effect, and chose certainty parameter to simulate rehabilitation strategies. The research considers bridge components in different area will effective by different atmosphere and different traffic volume. Because those reason, the bridge components consider many uncertainty factors. The research combine traditional deterioration rate with fuzzy theory. Using fuzzy multi-objective optimization technique to helps bridge engineer analysis the rehabilitation point and strategies under uncertainty.

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