本研究進行鋼筋混凝土方柱在不同軸壓下之靜態與動態反覆載重實驗， 以了解近斷層地震之速度脈衝效應對柱構件側力與位移曲線影響。試體依照 混凝土結構設計規範設計，共計四座高寬比3.5之單曲率柱，在國家地震工程研究中心台南實驗室BATS測試。實驗變數為軸壓力，分別為0.1及0.3 fc’Ag，並各有一座靜態及動態試驗。速度參數係參考2017-2018年間在國家地震工程研究中心台南實驗室之兩棟七層樓RC建築物振動台實驗，由二樓樓版之速度歷時，選擇250 mm/sec。遲滯迴圈結果顯示，各柱之破壞模式為撓曲破壞，試體側向強度隨軸壓比提高而增加，最大位移則減少。此外，比較動態及靜態實驗結果，動態效應下試體最大側力及初始勁度有所提升，最大位移則與靜態相近。根據試體所量測之應變率，採用CEB和Malvar等人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程式可以獲得考慮速度脈衝之塑性鉸參數及預測之側推曲線。分析結果顯示，近斷層地震作用下應考慮速度脈衝效應對材料模式影響，以合理掌握柱構件之側力位移曲線。

In this study, the reinforced concrete square columns were subjected to repeated loading tests in both static state and dynamic state to understand their lateral force and displacement behavior under near-fault earthquakes. The experimental sample design is based on “Code for design of concrete structures”. The experimental group is 4 sets of reinforced column whose span-to-depth ratio is 3.5, and the predicted failure mode of all column is flexural failure. The variables are axial load ratio, including 0.1 and 0.3, and loading speeds, including 0, 250 mm/sec. The experimental results show that the lateral strength of the test body increases with the increase of the loading speed and axial load ratio, 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 and Malvar el at. is used to correct the stress and strain modes of concrete and rebar. 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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