連續發生火災和地震對於建築物之結構性能會受到顯著影響，不僅威脅生命安全，還可能導致建築物和財產的嚴重損害，因此，為了保證後續使用，需要確保結構之安全性和穩定性，對於受火害影響之結構進行性能評估並採取適當的修復措施的需求日益增加。本研究之目的在於探討受火災影響之RC柱透過無收縮水泥砂漿和點焊鋼絲網進行修復，以評估其耐震性能。
本研究製作2座鋼筋混凝土單柱試體，並根據CNS 12514-1之標準升溫曲線於火爐中進行加熱2小時，以模擬受火災之RC柱；接著，將試體之保護層鑿除，並以使用無收縮水泥砂漿進行填補，其中一座試體額外增加點焊鋼絲網。修復完成後，進行反覆載重實驗，於實驗過程中施加0.1軸壓比於柱頂，透過遲滯迴圈和包絡線討論構件之結構行為，並與未火害之CNF及火害未修復之CF1進行比對。實驗結果顯示，利用無收縮水泥砂漿修復可以良好的恢復側向強度，而點焊鋼絲網可以提供些許圍束效果，兩者皆為有效之修復工法。
於實驗結束後，使用ETABS並搭配TEASPA進行分析，於分析過程中需要調整2個參數。第一為TEASPA中調整試體之強度，分別要考慮到火害後混凝土強度之影響、無收縮水泥砂漿強度以及點焊鋼絲網之圍束效果；第二為試體經過火害後修復及震害之影響，因此於ETABS中初步提出有效慣性矩需進行折減0.2倍，使分析更加擬合實驗結果。

Continuous occurrences of fires and earthquakes significantly affect the structural performance of buildings, not only posing threats to life safety but also potentially causing severe damage to buildings and property. Therefore, to ensure the continued use of buildings, it is necessary to guarantee the safety and stability of the structure. There is an increasing need for performance evaluation and the implementation of appropriate repair and reinforcement measures for structures affected by fire damage. The purpose of this study is to investigate the seismic performance of fire-damaged RC columns repaired using non-shrink cement mortar and welded wire mesh.
In this study, two reinforced concrete (RC) column specimens were fabricated. These specimens were subjected to a heating process in a furnace for two hours according to the CNS 12514-1 standard to simulate fire-damaged RC columns. After heating, the concrete cover of the specimens was removed and filled with non-shrink cement mortar. One of the specimens was additionally reinforced with welded wire mesh. After completing the repairs, cyclic loading tests were conducted, applying an axial load ratio of 0.1 to the top of the columns. The structural behavior of the specimens was analyzed through hysteresis loops and envelope curves. The results were compared with the non-fire-damaged column (CNF) and the fire-damaged but unrepaired column (CF1).The experimental results indicated that repairs using non-shrink cement mortar effectively restored lateral strength, and the spot-welded wire mesh provided some confining effects, making both methods effective for repairing fire-damaged columns.
After completing the experiments, the next analysis was conducted using ETABS with TEASPA, with adjustment made to two parameters during the process. First, in TEASPA, adjustments were made for the specimen's strength considering the effects of post-fire concrete strength degradation, non-shrink cement mortar strength, and the confinement effect of spot-welded steel mesh. Second, due to the combined effects of fire damage and seismic loading on the specimens, an initial proposal was made to reduce the effective moment of inertia by 0.2 in ETABS to better fit the experimental results.

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