论文部分内容阅读
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。
Through the low cycle repeated loading test of 1 × fully regenerated square steel tube recycled concrete column-reinforced concrete beam with recycled concrete beams, the results show that the square steel tube concrete columns consisting of fully regenerated concrete with 100% replacement rate of recycled coarse aggregate-reinforced concrete The mechanical behaviors and failure modes of the beam-frame are obtained, and the seismic performance indexes such as load-displacement hysteresis curve, skeleton line, displacement ductility and energy dissipation are obtained and analyzed in detail. The results show that even if the CFRP-SRC frame composed of fully recycled concrete with 100% replacement rate of recycled coarse aggregate can still meet the current national seismic design standards through reasonable design, its full hysteresis curve, The displacement ductility coefficient is close to 3 and the displacement angle between layers is up to 1/30. The equivalent viscous damping coefficient at failure reaches 0.216, and the energy dissipation capability is strong.