本文共完成四組包覆型鋼骨鋼筋混凝土柱反復載重試驗，探討梁柱接頭區以角隅箍筋取代閉合箍筋是否可以有效抑止主筋挫屈。若柱斷面角落配置一支主筋時，採用迴紋針形角隅箍筋，柱斷面角落配置三支主筋時，採用蝴蝶形角隅箍筋，載重沿對角線方向施加於SRC試體，得以更嚴格的測試角隅箍筋的可行性。試體之梁柱接頭區四面皆有側向梁，其中一組試體側向梁為SRC梁斷面，另外三組試體側向梁為純鋼骨斷面，除此之外，更進一步的觀察SRC柱在雙軸彎矩作用下的遲滯消能行為。根據試驗觀察及試驗數據分析，作成結論如下：(1) 若梁柱接頭區角隅箍筋之間距與塑性鉸區箍筋間距相同，角隅箍筋可有效抑止主筋挫屈；(2) 雙軸彎矩作用下，配置於角落之主筋量可以有效提升斷面彎矩容量；(3) 十字型鋼骨腹板深度加深之NSRC柱斷面對於彎矩強度貢獻之差異不大；(4) NSRC所包覆的核心混凝土面積大，使得消能佳、迴圈飽滿； (5) 四組試體中TSRC斷面之變性能力可達4.3%之層間位移角，NSRC斷面之變性能力可達4.7%之層間位移角。

In this research, 4 sets of large scale encased steel column specimens were tested under cyclic load to investigate the function of corner stirrup and the cyclic behavior of the columns under biaxial bending. All the specimens were with transverse beams to simulate the condition of interior column. According to the test results, conclusions can be made as follows: (1) The corner stirrups shows the function of preventing longitudinal steels bars from buckling as expected; (2) Column sections with deeper H shape possessed better energy dissipation capacity, but did not show the benefit of higher bending strength; (3) Number of steel bars at column corner had significant effect of biaxial bending strength of the columns; (4) The deformability and ductility of encased steel columns in the 45o direction is very good when axial force is absent.

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