装配式钢管混凝土组合框架的抗震性能试验研究

发布时间：2018-04-12 19:59

本文选题：装配式钢管混凝土组合框架 + 端板连接　；参考：《土木工程学报》2017年08期

【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。
[Abstract]:Circular or square concrete-filled steel tubular columns and steel beams are connected with steel beams by one-sided high-strength bolts and suitable end slabs, and a new type of fabricated composite frame is formed through reinforced truss concrete composite floor slabs.In order to understand the seismic behavior and mechanical mechanism of composite frame with concrete-filled steel tubular (CFST) composite frame subjected to earthquake,In this paper, the horizontal low cycle cyclic loading tests of two two-story single-span concrete-filled steel tubular columns and steel-concrete composite beams are carried out, which are formed by one-sided high-strength bolts or end-plate connections.The effects of column cross-section and end-plate connection on the failure and seismic behavior of composite frame are studied.In this paper, the whole process of the combined frame subjected to horizontal and low cyclic cyclic loading and the development law of floor crack are observed in detail. The hysteretic curve, skeleton curve, stiffness degradation law and ductility of this kind of structure are obtained.Energy dissipation capacity and other seismic performance indicators.The experimental results show that the single-side bolted end-plate fabricated CFST composite frame structure has good hysteretic performance and energy dissipation capacity. The ductility coefficient 渭 is 2.134.28, and the energy dissipation coefficient E is 0.652 ~ 0.90.Under the same steel content of column section, the bearing capacity of CFST composite frame is smaller than that of CFST composite frame, and its ductility and energy dissipation performance are better than that of CFST composite frame.The research results will provide scientific basis for the design theory and application of the assembled CFST composite frame in China.
【作者单位】：合肥工业大学;安徽先进钢结构技术与产业化协同创新中心;
【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)
【分类号】：TU352.11;TU398.9

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