使用不鏽鋼鋼筋和傳統鋼筋在預鑄混凝土結塊橋柱反覆載重行為(消能鋼筋)的消能進行研究。不鏽鋼鋼筋比傳統的鋼筋有較高的強度、更好的延展性和較好的抗腐蝕能力。用三座大型的橋柱進行研究，分別設計了一座橋柱使用不鏽鋼的消能鋼筋試體和兩個傳統消能鋼筋的橋柱試體。有一橋柱使用不鏽鋼消能鋼筋，試驗將消能鋼筋給予充分的握裹能力。另一橋柱使用傳統的消能鋼筋，也是將消能鋼筋給予充分的握裹能力。還有一座橋柱使用傳統的消能鋼筋，有一部分的消能鋼筋長度是沒有握裹，這樣可以延遲鋼筋斷裂所以可以增加消能的能力。試驗結果表示橋柱在使用不鏽鋼的消能鋼筋會比有充分握裹的傳統消能鋼筋有更好的位移量和較大的側推力量和較大的消能。無握裹的傳統消能鋼筋和不鏽鋼的消能鋼筋會得到相同的位移量和相似的消能。這三座橋柱表現出較好的自我復位的能力，橋柱所殘留的位移小於0.4%的位移量。分析的模型是用簡易的分析方法。分析和實驗得知三座橋柱的位移與側推載重的包絡線關係，得到了良好的結果。

The cyclic behavior of precast segmental concrete bridge columns with high performance(HP) steel rebar and that with conventional steel rebar as energy dissipation (ED) barswere investigated. The HP steel rebar is characterized by higher strength, greater ductility and superior corrosion resistance in comparison to the conventional steel rebar. Three large-scale columns were tested. One was designed with the HP ED bars and two with the conventional ED bars. The HP ED bars were fully bonded to the concrete. The conventional ED bars were fully bonded to the concrete for one column while unbounded for a length to delay fracture of the bars and to increase energy dissipation for the other column. Test results showed that the column with the HP ED bars had greater drift capacity, higher lateral strength and larger energy dissipation than that with fully-bonded conventional ED bars. The column with unbonded conventional ED bars achieved the same drift capacity and similar energy dissipation as that with the HP ED bars. All three columns showed good self-centering capability with residual drifts not greater than 0.4% drift. Good agreement was found between analytical predictions and the envelope responses of the three columns in terms of drift versus lateral force, amount of joint opening, ED bar strain, and tendon force.

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