内埋空间钢构架方形钢管混凝土短柱轴压承载力计算
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摘要
空间钢构架对核心混凝土以及方形钢管对空间钢构架外混凝土具有约束作用,这种双重约束作用可以有效地提高内埋空间钢构架钢管混凝土组合柱的承载力和变形性能,为了进一步探索内埋空间钢构架方形钢管混凝土组合短柱的轴压承载力的计算方法,在试验研究和有限元模拟分析的基础上,分析了内埋空间钢构架方形钢管混凝土短柱的混凝土约束机理。在此基础上,提出了两种不同计算模型的内埋空间钢构架方形钢管混凝土短柱轴压承载力计算公式,分析表明,公式计算值与试验值吻合较好,可以用来计算这种新型组合柱的轴压承载力,为这种组合柱的推广应用提供了技术依据。
The spatial steel frame has the constraint effect on the core concrete and the square steel tube to the outer concrete of the spatial steel frame,this double constraint effect can effectively improve the bearing capacity and deformation of square steel tubular concrete short columns filled spatial steel frame. In order to develop calculation methods of axial bearing capacity of square steel tubular concrete short columns filled spatial steel frame,on basisof experimental study and nonlinear finite element analysis,the constraint mechanism were analyzed. The formulas for axial bearing capacity of square steel tubular concrete short column filled spatial steel frame in two different calculation models are presented. The result shows the calculated values coincide with the test values and the calculation formulas can be used for predicting the axial bearing capacity of square steeltubular concrete short columnfilled spatial steel frame. These conclusions can provide some technical basis for engineering application of these composite columns.
The spatial steel frame has the constraint effect on the core concrete and the square steel tube to the outer concrete of the spatial steel frame,this double constraint effect can effectively improve the bearing capacity and deformation of square steel tubular concrete short columns filled spatial steel frame. In order to develop calculation methods of axial bearing capacity of square steel tubular concrete short columns filled spatial steel frame,on basisof experimental study and nonlinear finite element analysis,the constraint mechanism were analyzed. The formulas for axial bearing capacity of square steel tubular concrete short column filled spatial steel frame in two different calculation models are presented. The result shows the calculated values coincide with the test values and the calculation formulas can be used for predicting the axial bearing capacity of square steeltubular concrete short columnfilled spatial steel frame. These conclusions can provide some technical basis for engineering application of these composite columns.
引文
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[2]韩林海,陶忠.方钢管混凝土轴压力学性能的理论分析与试验研究[J].土木工程学报,2001,34(2):17-25.
[3]吕西林,余勇.轴心受压方钢管混凝土短柱的性能研究:I试验[J].建筑结构,1999,2(10):41-43.
[4]李小伟,赵均海,朱铁栋,等.方钢管混凝土轴压短柱的力学性能[J].中国公路学报,2006,19(4):77-81.
[5] STEPHE S P. Axially load concrete-filled steel tubes[J]. Journal Structural Engineering,1998,124(10):1125-1138.
[6] BADALAMENTI V,CAMPIONE G,MANGIAVILLANO M L. Simplified model for compressive behavior of concrete columns strengthened by steel angles and strips[J]. Journal of Engineering Mechanics,2010,136(2):230-238.
[7] KHALIFA E S,AL-TERSAWY S H. Experimental and analytical behavior of strengthened reinforced concrete columns with steel angles and strips[J]. International Journal of Advanced Structural Engineering(IJASE),2014,6(2):1-14.
[8]鲁华伟.角钢约束混凝土轴压短柱试验与有限元分析[D].大庆:东北石油大学,2009.
[9]董清会.角钢约束混凝土短柱试验研究与有限元分析[D].大庆:东北石油大学,2013.
[10]陈晓峰.空间钢构架混凝土柱受力性能试验研究[D].苏州:苏州科技学院,2015.
[11]王恺.空间钢构架约束混凝土的本构关系及其轴压短柱的有限元分析[D].苏州:苏州科技学院,2015.
[12]李伟强,唐兴荣,贾欢.空间钢构架—钢管混凝土短柱轴压承载力计算[J].广西大学学报(自然科学版),2016,41(3):607-614.
[13]王清湘,赵大洲,关萍.轴心受压钢骨—钢管高强混凝土组合柱力学性能的研究[J].东南大学学报(自然科学版),2002,32(5):44-49.
[14]肖阿林.钢骨钢管高性能混凝土轴压组合柱受力性能与设计方法研究[D].长沙:湖南大学,2009.
[15]胥彦.非对称型钢骨—钢管混凝土组合柱力学性能研究[D].南昌:南昌航空大学,2017.
[16]周宇星.内埋空间钢构架方形钢管混凝土轴压短柱受力性能试验研究[D].苏州:苏州科技大学,2018.