全再生方钢管混凝土柱-钢筋混凝土梁框架的抗震性能试验研究

通过1榀全再生方钢管再生混凝土柱-钢筋再生混凝土梁框架试件的低周反复加载试验，揭示了由再生粗骨料取代率为100%的全再生混凝土组成的方钢管混凝土柱-钢筋混凝土梁框架的受力机理和破坏形态，获取了其荷载-位移滞回曲线、骨架线、位移延性、能量耗散等抗震性能指标，并对其进行了详细分析。研究结果表明：即便是再生粗骨料取代率为100%的全再生混凝土组成的方钢管混凝土柱-钢筋混凝土梁框架，经过合理设计依然能够满足现行国家抗震设计标准要求；其滞回曲线饱满、位移延性系数接近3、层间位移转角达到1/30；破坏时的等效粘滞阻尼系数达到0.216，耗能能力强。

EXPERIMENTAL STUDY ON ASEISMIC PERFORMANCE OF FRAME CONSTRUCTED BY RECYCLED-CONCRETE-FILLED-SQUARESTEEL-TUBE COLUMNS AND BEAMS

By a low cycle reveres test for the specimen of a frame constructed by recycled aggregate replacement percentage 100% recycled concrete filled-square steel tube columns and reinforced recycled concrete beams, the mechanical behavior and failure mode were revealed, and the hysteretic curve, skeleton curve, ductility, dissipation capacity and stiffness degeneration were obtained. The test results indicate that: the aseismic performance index of the RCFSST-RRCB frame can meet the Chinese aseismic code requirements; its hysteretic curve likes a full fusiform and has a symmetrical shape; the displacement ductility factor is near three; the ultimate rotation can reach 1/30; and the equivalent viscous damping coefficient at failure point is 0.216.