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试验主要以性能增强再生混凝土为切入点,以构成性能增强再生混凝土的两个主要因素:硅灰及混杂纤维,将框架主要受力部位按照不同再生骨料取代率及掺入不同比率的性能增强材料,着手进行框架抗震性能的研究。对框架模型的自振频率、结构等效刚度、结构阻尼比、结构振型、加速度反应、位移反应进行分析。采用层间变形作为评估指标,对性能增强再生混凝土框架的抗震能力进行评估。试验结果表明:随着地震强度的增加,性能增强材料对再生混凝土框架的破坏有明显的抑制作用,减轻了关键部位的震害,弥补了再生混凝土延性不足,易开裂的缺点。研究表明,性能增强材料对再生混凝土框架结构的抗震能力具有良好的加强作用。
The experiment mainly focuses on performance-enhancing recycled concrete to form two main factors that enhance the performance of recycled concrete: silica fume and hybrid fiber. The main force-bearing parts of the frame are reinforced according to the performance of different recycled aggregate substitution rate and incorporation of different ratios Materials, proceed with the study of the seismic performance of the frame. The natural frequency, structural equivalent stiffness, structural damping ratio, structural mode shape, acceleration response and displacement response of the frame model are analyzed. The interlayer deformation is used as the evaluation index to evaluate the seismic capacity of reinforced concrete frames with performance enhancement. The experimental results show that with the increase of earthquake intensity, the performance-enhancing material can obviously restrain the damage of recycled concrete frame, reduce the damage of key parts, and make up for the shortcomings of insufficient ductility and easy cracking of recycled concrete. The research shows that the performance enhancing material has a good reinforcing effect on the seismic capacity of recycled concrete frame structure.