A Study on Ultimate Strength of Unsymmetric Steel Reinforced Concrete Beam-Columns
|關鍵字:||鋼骨鋼筋混凝土;軸力-彎矩強度;梁柱構材;Steel reinforced concrete(SRC);Axial load-Moment Strength;Beam-Columns|
|摘要:||過去國內外對鋼骨鋼筋混凝土(Steel Reinforced Concrete，簡稱SRC)柱及梁柱構材的研究較著重於探討雙對稱斷面構材的軸向載重、偏心載重、軸力-彎矩等之行為，極少探討非對稱斷面之SRC構材之行為，唯為於工程實務上有較廣之應用，非對稱的T字型鋼骨斷面或鋼骨偏心斷面之SRC構材實有深入研究之必要性。
Researches on steel reinforced concrete (SRC) columns during the past few decades were focused on the symmetrical structural steel shape. This research conducted experimental studies to investigate the behavior and ultimate strength of concrete-encased steel columns having unsymmetrical T-shape structural steel section. Twenty specimens including six short SRC columns and fourteen SRC beam-columns were designed and constructed. The short columns were loaded monotonically to failure while the beam-columns were subjected to axial load as well as flexural bending simultaneously. Variables to be studied included the shape of structural steel, the ratio of the area of structural steel shape to concrete section, the effect of axial load and the eccentricity of structural steel shape. Effects of various experimental parameters on the behavior were discussed. The experimental results were summarized and presented. The results indicate that ACI Building Code and AIJ SRC Standards can predict well the load carrying capacities of the SRC columns having unsymmetrical structural steel shape.