装配式钢管混凝土组合框架的抗震性能试验研究  

Experimental study on seismic behavior of prefabricated CFST composite frames

作　　者：王冬花[1] 王静峰[1,2] 李贝贝[1] 潘学蓓 柳炳康[1] 

机构地区：[1]合肥工业大学,安徽合肥230009 [2]安徽先进钢结构技术与产业化协同创新中心,安徽合肥230009

出　　处：《土木工程学报》2017年第8期20-28,48,共10页China Civil Engineering Journal

基　　金：国家自然科学基金(51478158;51178156);教育部新世纪优秀人才支持计划(NCET-12-0838)

摘　　要：圆形或方形钢管混凝土柱与钢梁通过单边高强螺栓和适宜端板连接组成框架,通过钢筋桁架混凝土组合楼板形成了新型装配式组合框架。为了解装配式钢管混凝土组合框架在地震作用下的抗震性能和受力机理,进行了2榀两层单跨钢管混凝土柱与钢-混凝土组合梁通过单边高强度螺栓和平齐或外伸端板连接形成的组合框架的水平低周反复荷载试验,研究了柱截面形式和端板连接类型对组合框架破坏形式和抗震性能的影响。详细地观察了此类组合框架在水平低周反复荷载作用下的受力全过程和楼板裂缝发展规律,得到了此类结构的滞回曲线、骨架曲线、刚度退化规律、延性、耗能能力等抗震性能指标。试验结果表明,单边螺栓端板连接装配式钢管混凝土组合框架结构具有良好的滞回性能和耗能能力,延性系数μ为2.13~4.28,能量耗散系数E为0.652~0.90。在柱截面含钢率相同条件下,圆钢管混凝土组合框架的承载力小于方钢管混凝土组合框架,其延性、耗能性能优于方钢管混凝土组合框架。研究成果将为我国装配式钢管混凝土组合框架设计理论与应用提供科学依据。The novel composite frames are composed of steel bar truss decks and traditional frames with steel beams and circular or square concrete-filled steel tubular columns connected with blind bolted end plate joints. In order to investigate the seismic behavior and failure mechanism of prefabricated CFST composite frames under seismic action, two two-layer one-span specimens of high strength blind bolted flush or extended endplate connected frames between CFST columns and composite beams were conducted. The influence of column section type and the end plate type on the failure modes and seismic performance of composite frames were studied. The whole loading progress and failure characteristics of two specimens under low cycle loading were discussed. The hysteretic curves, skeleton curves, stiffness degradation curves, ductility and the energy dissipation capacity were also analyzed. The test results show that prefabricated CFST composite frames have good hysteretic behavior and energy dissipation. The ductility coefficient/x is between 2.13 and 4.28, the energy dissipation coefficient E is between 0. 652 and 0.90. Under the same steel ratio of the column section, the ultimate bearing capacity of square CFST composite frames is higher than that of circular CFST composite frame respectively. The ductility and the energy dissipation capacity of circular CFST composite frames are better than those of square CFST composite frames. The study results can provide reference for the design theory and application of assembly CFST composite frame.

关 键 词：装配式钢管混凝土组合框架 端板连接 组合楼板 抗震性能 

分 类 号：TU398[建筑科学—结构工程]