【摘要】 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.更多还原

【Abstract】 A shaking table test on the repaired stair well of a two-storey reinforced concrete frame building after damaged by earthquake is introduced.In the test,the stair well is repaired with epoxy fine aggregate concrete,epoxy mortar,and carbon fibers,and the TAFT and artificial waves are input through a vibration table.The dynamic characteristics and reactions of the repaired model under different earthquake waves are measured.The variations of the self vibration frequencies of the model after different earthquake peaks are determined by white noise scanning.Comparisons of the dynamic properties and failure characteristics of the model before and after rehabilitation are made to verify the effectiveness of the rehabilitation method.更多还原