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介绍了受地震破坏的两层钢筋混凝土框架楼梯间模型经加固后的地震振动台试验.实验采用环氧细石混凝土、环氧砂浆、和碳纤维对破坏模型进行修补加固,并且采用振动台输入TAFT波和人工波,对其进行抗震实验,实测了加固模型的动力特性以及在不同地震波下的动力反应,并采用白噪声扫描的方法测定了模型在不同地震波峰值后的自振频率的变化.通过加固前后模型的动力特性对比,以及模型破坏特征的比较,验证了该楼梯间加固方法的有效性.
This paper introduces the seismic shaking table test of strengthened two-storey reinforced concrete frame stairway model subjected to earthquake damage.The model is repaired and reinforced by epoxy fine aggregate concrete, epoxy mortar and carbon fiber, Wave and artificial waves were used to test the dynamic characteristics of the reinforced model and the dynamic response under different seismic waves.The white noise scan method was used to measure the natural frequency of the model after different seismic wave peaks.The Comparison of the dynamic characteristics of the model before and after reinforcement and the comparison of the failure characteristics of the model verify the effectiveness of the reinforcement method for the stairwell.