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AXIAL BEARING CAPACITY OF FRP-CONCRETE-STEEL DOUBLE-SKIN TUBULAR SHORT COLUMNS
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摘要: 采用双剪统一强度理论对新型构件纤维增强复合材料(FRP)-混凝土-钢双壁空心管短柱的轴压承载力进行研究,通过考虑中间主应力及相应面上正应力的影响,忽略外层FRP套管对短柱轴力的贡献而只考虑套管对混凝土的套箍作用,提出FRP-混凝土-钢双壁空心管短柱的轴压承载力公式,并对影响因素进行分析。经比较,计算结果与相应文献的试验结果及有限元分析结果吻合较好,表明所推公式具有一定的适用性。
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关键词:
- 统一强度理论 /
- 中间主应力 /
- FRP-混凝土-钢双壁空心管 /
- 轴压承载力
Abstract: Under the twin shear unified strength theory,the research on the axial bearing capacity of FPR-concrete-steel double-skin tubular short columns was carried out.Through considering the influence of intermediate principal stress and the normal stress on the corresponding surface,ignoring the contribution of the outer tube to the axial bearing capacity of the short column and considering the hooping effect of the tube on the concrete,formula of axial bearing capacity of FPR-concrete-steel double-skin tubular short columns was presented and influencing factors were analyzed.The calculation results were compared with the experiment results in relevant documents and the finite element analysis results,well coinciding with each other,which suggests that the inferred formula has a certain applicability. -
[2] Teng J G, Yu T, Wong Y L, et al. Hybrid FRP-Concrete-Steel?Tubular Columns;Concept and Behavior[J].Construction and?Building Materials,2007,21(4):845-854. Teng J G, Yu T, Wong Y L. Behaviour of hybrid FRP-ConcreteSteel Double-Skin Tubular Columns[C]// The 2 nd International?Conference on FRP Composites in Civil Engineering. Adelaide,?Australia:2004:811-818. [3] Yu T, Wong Y L, Teng J G, et al. Flexural Behavior of Hybrid?FRP-Concrete-Steel Double Skin Tubular Members[J].Journal of?Composites for Construction,2006,10(5):443-452. [4] Yu T. Structural Behavior of Hybrid FRP-Concrete-Steel DoubleSkin Tubular Columns[D].Hong Kong;The Hong Kong?Polytechnic University,2006. [5] 钱稼茹,刘明学. FRP-混凝土-钢双壁空心管短柱轴心抗压试验研究[J].建筑结构学报,2008,29(2):104-113. [6] 解卫国,娄吉宏,余小伍. CFRP-混凝土-钢管组合柱轴心受压性能的有限元分析[J].广州建筑,2007(4):3-8. [7] Yu Maohong. Unified Strength and Its Applications[M].Berlin:?Springer Press,2004. [8] 赵均海.强度理论及其工程应用[M].北京:科学出版社, 2003. [9] 于峰,牛荻涛.基于双剪统一强度理论的 FRP 约束混凝土的承载力[J].哈尔滨工业大学学报,2009,41(12):186-189.? -
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