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改革开放近四十年来,伴随着交通事业长足发展的同时,改革开放早期修建的桥梁服役期增长,交通量剧增,加上目前地壳进入活跃期,这些桥梁将不能满足抗震及使用要求,桥梁的修复与加固将越发重要,而对损伤钢筋混凝土的研究是钢筋混凝土桥梁修复与加固的基础。本文通过对钢筋混凝土桥墩中箍筋、纵筋、混凝土分别作退化考虑,并反应到材料本构参数计算中,再通过Open Sees程序对原型桥墩、CFRP修复后桥墩在循环荷载下滞回性能进行模拟,并将结果进行比较,得出相关结论。
Over the past 40 years since the reform and opening up, with the rapid development of transport industry, the service life of bridges built during the early stage of reform and opening up, the traffic volume increased sharply, and the present crust has entered an active phase, these bridges will not meet the requirements of earthquake resistance and use. Of the repair and reinforcement will be more and more important, and the study of damaged reinforced concrete is the foundation of reinforced concrete bridges repair and reinforcement. In this paper, considering the degeneration of stirrups, longitudinal bars and concrete in reinforced concrete piers, respectively, and taking into account the constitutive parameters of materials, the hysteretic behavior of prototype piers and CFRP piers after cyclic loading under Open Sees program Simulation, and the results were compared to draw the relevant conclusions.