摘要
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 test is mainly focused on enhanced recycled aggregate concrete. There are two main tactors which enhance the pertormance of recycled aggregate concrete： silica fume and hybrid fiber. The research on the seismic behavior of frame could be done in such way that according to different replacement rate of recycled aggregate the reinforcing materials with different ratio were added to the main parts of frame. The natural frequency, equivalettt stiffness,the damping ratio, the vibration mode, the acceleration response and the displacement response etc were analyzed and discussed. The inter-storey deformation was adopted as the index to evaluate the seismic performance of the RAC frame model. The experimental results show that the following points： reinforced materials can signitlcantly inhibit the damage of the RAC frame structure model, reduce earthquake damage of the frame key parts and make up for the deficiency of the ductility of the recycled aggregate concrete. According to research, reinforced materials have good effect on enhancing the aseismic capacity of recycled aggregate concrete frame structures.
出处
《工业建筑》
CSCD
北大核心
2013年第11期30-33,44,共5页
Industrial Construction
基金
国家自然科学基金项目(10972168)
中国煤炭地质总局航测遥感局科技创新基金项目
关键词
再生混凝土
框架结构
硅灰
混杂纤维
振动台试验
抗震能力
recycled aggregate concrete
frame structure
silica fume
hybrid fiber
shaking table test
aseismic capacity
