摘要
对足尺的3个再生混凝土框架中间节点与1个普通混凝土节点进行低周反复荷载试验,主要目的为考查在低轴压比情况下再生混凝土节点发生粘结滑移破坏的可能性。各试件符合"强柱弱梁、强节点"的设计原则。结果表明,在低轴压比情况下,再生混凝土节点试件发生显著的粘结滑移,延性性能和耗能性能差,不能满足抗震设计的要求,而相应的普通混凝土节点实现了梁铰破坏机制,延性和耗能性能良好。为获得良好的抗震性能,应对再生混凝土节点区锚固进行合理设计,如采用可靠的机械锚固措施,建议进一步开展再生混凝土框架节点区粘结机理和锚固措施研究。
Three full- scale recycled concrete interior joints and one normal concrete joint are tested under cyclic loading. The tests aim at examining the possibility of bond failure in recycled concrete interior joints with low axial load ratios. All specimens are designed following the design philosophy of strong column - weak beam and strong joint approach. The results show that significant bond slip occurs in recycled concrete joints under low axial load ratios. They exhibit low ductility and energy dissipation which can not meet the requirements of seismic design. However, the correspbnding normal concrete specimen achieves beam hinge mechanism and gains good ductility and energy dissipation. In order to attain satisfactory seismic performance, it is suggested that the anchorage detailing should be reasonably designed for recycled concrete joints, such as taking reliable mechanical anchorage. If is recommended that the bond mechanism and anchorage measures in recycled concrete frame joints should be further investigated.
出处
《世界地震工程》
CSCD
北大核心
2014年第3期86-92,共7页
World Earthquake Engineering
基金
国家自然科学基金项目(51378044)
北京市自然科学基金重点项目(8091002)
关键词
再生混凝土
中间节点
抗震性能
粘结滑移
recycled concrete
interior beam - column joint
seismic behavior
bond slip
