鋼筋混凝土柱受剪破壞在九二一集集地震勘災紀錄中極具代表性，特別是短柱桿件之剪力破壞，是造成結構物崩塌的主因之一。因此，本研究主要以實驗及分析方法，來探討鋼筋混凝土(RC)短柱受剪破壞之耐震行為，並與1/2縮尺振動台實驗結果進行對照，以觀察靜態實驗與動態實驗之關連性。
本研究中共製作8座RC短柱試體，分別變化高寬比、軸壓比與配筋形式，在雙曲率變形與固定軸力的狀態下，進行反覆載重試驗，以瞭解鋼筋混凝土短柱受震後之行為，並觀察短柱在剪力破壞後之崩塌行為。本實驗結果顯示，載重與層間變位角的關係在不同高寬比之桿件上並無明顯差異；配筋形式改變了試體的破壞模式；而高軸壓比則加速試體的崩塌行為。最後，本研究於垂直承載力喪失之認定上，係指柱之垂直力抵抗能力急遽下降，而不以側力強度為零之位移作判斷之基準，與過去有所不同。

Reinforced concrete(RC) columns failed by shear are common representatives during Chi-Chi earthquake. Especially, the shear failure of RC short columns is one of the most important failure modes which cause building collapse. Therefore, this study focuses on the behavior of RC short columns failed by shear, and the behavior of collapse after shear failure. Also, the aforementioned behavior can be compared with the results of shaking table tests of 1/2 scale specimens to observe the difference between static and and dynamic tests.
Eight specimens were constructed and tested to study the seismic behavior of short columns. These specimens with different height-to -depth ratio, shear reinforcement detailing and axial load ratios were subjected to double curvature bending with constant axial forces to observe the behavior of the shear and axial failure. Test results show that the relationship between lateral force and drift ratio seems not so obvious; different shear reinforcement detailing results in different failure modes; the axial failure takes place much early with high axial load ratio. Finally, this study recognizes the axial failure when axial load carrying capacity decreases quickly. It is different from the past that recognizes the axial failure when lateral strength was zero.

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