耐久性损伤钢筋混凝土结构抗震分析参数研究

Research on seismic parameter of reinforced concrete structures with durability damage

根据目前已有试验资料和理论分析,讨论了对耐久性损伤钢筋混凝土结构抗震分析的影响因素,包括截面几何损伤、混凝土和钢筋力学性能劣化、钢筋混凝土粘结滑移劣化等,提出了钢筋混凝土结构抗震耐久性损伤参数的概念,并给出了计算方法。基于已有的钢筋混凝土结构的恢复力模型,并考虑各抗震耐久性损伤参数,对计算得到的锈蚀构件骨架曲线与试验值进行对比分析,其结果在总体上吻合较好。研究成果可在损伤钢筋混凝土结构地震反应分析中应用。

Based on the available experimental data and theoretical analysis, the influence factors on seismic analysis of reinforced concrete structure with durability damage were mainly discussed, including section geometrical damage, the performance deterioration of concrete and steel, the reduction of bond-slip of reinforced concrete. The concept and calculation method of damage parameters of reinforced concrete structure seismic durability were presented. Based on the existing restoring force model of reinforced concrete structure, and considering the damage parameters of various seismic durability, the skeleton curves of the corroded members can be got. These curves generally are in good agreement with the existing experimental data, which means these damage parameters can be used in seismic response analysis of damage reinforced concrete structure.