预制装配式框架结构梁柱节点力学性能试验研究  

Experimental study of mechanical properties of prefabricated frame structure beam-column joint

作　　者：宋玉普[1] 王军[1] 范国玺[1] 程万鹏[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2014年第4期438-444,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(重点项目90815026)

摘　　要：相比钢筋混凝土结构,钢骨混凝土结构因承载力较高和延性较好等诸多优点而应用广泛.以往的研究多数集中于整体式钢骨混凝土框架节点,有关采用钢板对焊拼接形式的预制装配式钢骨混凝土框架节点的研究相对较少.基于以上考虑,设计了两个预制装配式钢骨混凝土框架节点组合体和一个钢筋混凝土框架节点组合体,进行了柱向轴力恒定的拟静力加载试验.对节点组合体的破坏形态、延性、承载力退化、刚度退化和耗能能力作了详细论述.结果表明,轴压比对预制装配式钢骨混凝土框架节点的破坏形态无本质影响;相对钢筋混凝土框架节点,预制装配式钢骨混凝土框架节点具有较高的承载力和较好的延性;预制装配式钢骨混凝土框架节点的塑性变形能力强,具有较好的耗能能力;随轴压比的增大,预制装配式钢骨混凝土框架节点组合体的刚度退化和承载力退化速度提高,延性系数和耗能能力减小;梁连接区和节点核心区的应变随轴压比的增大而减小;框架梁连接区和节点核心区的钢骨和钢筋均未屈服,钢板对焊拼接的连接方式可行.Compared with reinforced concrete structure,steel reinforced concrete structure has been widely used due to its higher carrying capacity,better ductility and many other advantages.The maj ority of previous studies were focused more on the mechanical properties of monolithic steel reinforced concrete frame joint,but less on those of prefabricated steel reinforced concrete frame joint with steel welded connection.Based on the former considerations,two prefabricated steel reinforced concrete frame j oint combinations and a reinforced concrete frame j oint combination were designed. Quasi-static loading tests were conducted while the column axial loads were constant.The failure pattern,ductility,carrying capacity degradation,stiffness degradation and energy dissipation of j oint combinations were discussed in detail.Test results show that the axial compression ratio has no effect on the failure pattern of prefabricated steel reinforced concrete frame j oint.The prefabricated steel reinforced concrete frame joint performs higher carrying capacity and better ductility compared with the reinforced concrete frame j oint.The energy dissipation capacity of the prefabricated steel reinforced concrete frame joint is better due to its better plastic deformation capability.The carrying capacity and stiffness of the prefabricated steel reinforced concrete frame j oint decline sharply under higher axial compression ratio,and the ductility factor and energy dissipation capacity of the j oint combination decrease as the axial compression ratio increases.The higher the axial compression ratio is,the smaller the strain of the beam connection area or the joint core area is.The strain values of the beam connection area and the joint core area are less than the yield strain value,indicating that the steel welded connection is feasible.

关 键 词：预制装配式钢骨混凝土 梁柱节点 破坏形态 延性 耗能 

分 类 号：TU375.4[建筑科学—结构工程]