本研究進行鋼筋混凝土方形柱受到不同加載速度之反覆載重實驗，以了解其在近斷層地震下之側力與位移行為。實驗試體設計係參考1組雙曲率柱之靜態反覆載重結果，實驗組為4組動態反覆載重實驗，變數為加載速度，包括0、250、500及1000 mm/sec。實驗結果顯示，試體側向強度隨加載速度提高而增加，但尖峰強度之位移有降低的趨勢。本研究根據試體所量測之應變率，採用CEB之動態成長因子修正混凝土與鋼筋應力應變模式，並搭配TEASPA與XTRACT程式可獲得考慮速度脈衝之塑性鉸參數。分析結果顯示，應考慮速度脈衝效應對材料模式之影響，以合理掌握實驗之側力位移曲線的包絡線。

In this study, the reinforced concrete square columns were subjected to repeated loading tests at different loading speeds to understand their lateral force and displacement behavior under near-fault earthquakes. The experimental sample design is based on the static back load results of a set of double curvature columns. The experimental group is 4 sets of dynamic reverse load tests. The variables are loading speeds, including 0, 250, 500 and 1000 mm/sec. The experimental results show that the lateral strength of the test body increases with the increase of the loading speed, but the displacement of the peak intensity has a tendency to decrease. According to the strain rate measured by the specimen, the dynamic growth factor of CEB is used to correct the stress and strain modes of concrete and steel. The TEASPA and XTRACT programs can be used to obtain the plastic hinge parameters considering the velocity pulse. The analysis results show that the influence of the velocity pulse effect on the material mode should be considered to reasonably predict the envelope of the lateral force displacement curve of the experiment.

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