【摘要】 通过3根不锈钢钢筋混凝土梁和1根普通钢筋混凝土梁的拟静力试验,研究不锈钢钢筋混凝土梁的抗震性能。结果表明:试验梁在荷载作用下均经历了弹性阶段、屈服阶段、强化阶段和强度退化阶段;与普通钢筋混凝土梁相比,不锈钢钢筋混凝土梁的屈服位移、极限位移和位移延性系数均有明显增大,延性性能得到改善,强度和刚度退化较为平缓,滞回曲线较为饱满,滞回环面积加大,其总耗能是普通钢筋混凝土梁的2.36～4.25倍,其能量耗散系数是普通钢筋混凝土梁的1.12～2.63倍,表现出良好的抗震性能。随着配箍率的增加,不锈钢钢筋混凝土梁试件的极限承载力、屈服强度、延性、耗能能力逐渐增大,刚度退化减缓。随着混凝土强度的提高,试验梁的承载能力、屈服强度、刚度和总耗能明显提高,但位移延性系数有所降低。更多还原

【Abstract】 Based on the quasi-static test of three stainless steel reinforced concrete beams(SSRCB) and an ordinary steel reinforced concrete beam(OSRCB),the seismic behavior of SSRCB was studied.Results show that the test beams have all experienced the elastic stage,the yield stage,the hardening stage and the strength degradation stage under the design load.Compared with the OSRCB,the yield displacement,the ultimate displacement and the displacement ductility factor of the SSRCB have been increased obviously.The ductility performance has been improved.The degradation of the strength and the rigidity is moderate.The hysteresis curve is plump and the area of the hysteretic loop is larger.The total energy dissipation of the SSRCB is 2.36～4.25 times of the OSRCB and the energy dissipation coefficient is 1.12～2.63 times of the OSRCB,which exhibits good seismic performance.With the increase of the stirrup ratio,the ultimate bearing capacity,the yield strength,the ductility,the energy dissipation capacity of the SSRCB specimens increase gradually,and the stiffness degradation is slow down.With the increase of the concrete strength,the bearing capacity of the test beams,the yield strength,the stiffness and the total energy dissipation are increased significantly,but the displacement ductility factor is decreased.更多还原