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MECHANICAL BEHAVIOR OF STUB COLUMNS OF FRP-CONFINED CONCRETE-FILLED STEEL TUBES
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摘要: 进行了9个钢管混凝土轴心受压构件的试验研究，对其中的6个构件包裹了纤维增强复合材料(FRP)。试验参数为钢管截面形状、截面尺寸和包裹FRP的层数。试验结果表明，FRP约束圆钢管混凝土可以较好地发挥FRP约束混凝土和钢管混凝土的双重优点，构件在具有较高承载力的同时还具有较好的延性。最后，提供了FRP约束圆钢管混凝土轴压构件承载力的简化计算公式。Abstract: Nine tests on short concrete-filled steel tubes (CFST) were carried out,including six specimens wrapped by fiber reinforced polymers (FRP) and three unwrapped ones.The experimental parameters were sectional shape,section size and layers of FRP jackets.The test results demonstrated that,the FRP-confined concrete-filled steel tubular stub columns with circular sections have the merits of both FRP-confined concrete and CFST stub columns.A simple formula,which can be used for calculating bearing capacities of FRP-confined concrete-filled steel tubular stub columns with circular sections is established.
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Key words:
- FRP /
- concrete filled steel tubes /
- axial compression /
- load-deformation relations /
- bearing capacity
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韩林海.钢管混凝土结构-理论与实践.北京:科学出版社,2004; [2] Xiao Yan.Applications of FRP Composites in Concrete Columns.Advances in Structural Engineering,2004,7(4):335～343; [3] 陶忠,于清,韩林海,等.FRP约束钢筋混凝土圆柱力学性能的试验研究.建筑结构学报,2004,25(6):75～82; [4] 顾威,关崇伟,赵颖华,等.圆CFRP-钢复合管混凝土轴压短柱试验研究.沈阳建筑工程学院学报(自然科学版),2004,20(2):118～120; [5] Lam L,Teng J G.Design-Oriented Stress-Strain Model for FRP-Confined Concrete.Construction and Building Materials,2003,17(6-7):471～489; [6] 于清.FRP约束混凝土柱力学性能研究:[硕士学位论文].哈尔滨:哈尔滨工业大学,2002; [7] Schneider S P.Axially Loaded Concrete-filled Steel Tubes, Journal of Structural Engineering,ASCE,1998,124(10):1 125～1 138; [8] Han L H.Tests on Stub Columns of Concrete-Filled RHS Sections. Journal of Constructional Steel Research,2002,58(3):353～372 -
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