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为了达到震后快速加固修复和建筑节能改造等综合加固改造目的,提出采用三明治式预制自保温钢筋混凝土墙板(PISW)对震损钢筋混凝土框架进行快速加固的方法。开展了4榀采用预制自保温钢筋混凝土墙板加固震损框架模型的低周往复加载试验,研究了预制自保温钢筋混凝土墙板与损伤框架之间的连接构造以及墙板配筋率对加固效果的影响,分析了试件的破坏特征、滞回性能、骨架曲线、耗能能力等。结果表明:采用预制自保温钢筋混凝土墙板加固方法可大幅度提高震损框架的承载能力;预制自保温钢筋混凝土墙板与损伤框架之间的界面强度是影响加固试件承载能力的主要因素;由于墙板破坏不充分,墙板配筋率的变化并未对承载力产生明显影响。基于试验研究结果提出了预制自保温钢筋混凝土墙板加固震损框架受剪承载力计算方法。
In order to achieve the purpose of comprehensive reinforcement and reconstruction such as rapid reinforcement and retrofitting after the earthquake and reconstruction of buildings, a sandwich reinforced precast reinforced concrete wall panel (PISW) is proposed to rapidly reinforce the frangible reinforced concrete frame. The low-cycle reciprocating loading test of prefabricated reinforced concrete wall slab reinforced with reinforced concrete wall slab was carried out. The connection between the prefabricated self-insulating reinforced concrete wall slab and the damage frame and the reinforcing effect of wall reinforcement ratio were studied The damage characteristics, hysteretic behavior, skeletal curve, energy dissipation capacity and so on were analyzed. The results show that the precast reinforced concrete wallboard reinforcement method can greatly improve the bearing capacity of the frangible frame. The interfacial strength between prefabricated self-insulation reinforced concrete wallboard and the damaged frame is the main factor that affects the bearing capacity of the strengthened specimen. Due to inadequate wallboard failure, the rate of wall reinforcement did not change the bearing capacity significantly. Based on the experimental results, a method to calculate the shear capacity of prefabricated reinforced concrete wall panels under earthquake damage was put forward.