型钢混凝土T形柱抗震性能试验研究

Experimental Research on Seismic Behavior of Steel Reinforced Concrete T-shaped Column

对6个型钢混凝土T形柱和1个普通钢筋混凝土T形柱进行低周反复加载试验,研究配钢形式和轴压比对破坏形态、滞回曲线和延性的影响。试验结果表明:型钢混凝土T形柱的承载力和延性均优于普通钢筋混凝土T形柱;与实腹式配钢T形柱相比,"T形钢+方钢管"配钢T形柱的承载力较小,但延性有所改善;型钢混凝土T形柱的延性随轴压比的增加先升高后下降。"T形钢+方钢管"配钢T形柱中型钢充分受力,适合推广。

Six steel reinforced concrete T-shaped columns and one reinforced concrete T-shaped column were tested under low cyclic loading to study how section steel layout form and axial compression ratio influence failure mode,hysteretic curve and ductility. It turns out steel reinforced concrete T-shaped column is better than reinforced concrete T-shaped column in capacity and ductility. Compared with the solid-webbed column,＂T-shaped steel and square steel tube＂column has lower capacity but better ductility. With axial compression ratio increasing,the ductility of steel reinforced concrete T-shaped column rises at first,but decreases finally. The section steel in＂T-shaped steel and square steel tube＂column performs better and this section steel layout form is worth promoting.