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为了研究钢筋混凝土巨型框架结构体系的抗震性能及其地震作用损伤机理,设计制作1/25的缩尺模型,并设计加工了一套调谐质量阻尼器(TMD)装置安装在模型结构顶部,进行振动台试验,得到结构的动力特性和位移响应,并对比分析了TMD的减震效果。结果表明:当在峰值加速度为0.140g的地震波作用后(相当于原型7度多遇地震),模型结构处在弹性工作状态,在峰值加速度为0.400g的地震波作用后(相当于原型7度基本烈度),模型结构出现轻微破坏,在峰值加速度为0.880g的地震波作用后(相当于原型7度罕遇地震),模型结构出现中等破坏,该原型结构可以满足抗震设计的要求;TMD装置具有较好的减震效果。
In order to study the seismic performance of reinforced concrete mega frame structural system and the earthquake damage mechanism, a 1/25 scale model was designed and fabricated. A set of tuned mass damper (TMD) was designed and installed on top of the model structure for vibration The dynamic characteristics and the displacement response of the structure are obtained from the table test. The damping effect of TMD is compared and analyzed. The results show that the model structure is in elastic working state when the peak acceleration is 0.140g (equivalent to the earthquake of the prototype 7 degree), and after the seismic wave peak acceleration is 0.400g Intensity), the structure of the model is slightly damaged. After the seismic wave with the peak acceleration of 0.880g (equivalent to a rare earthquake of 7 degrees in the prototype), the model structure appears moderately destroyed, and the prototype structure can meet the requirements of the aseismic design. Good damping effect.