钢管混凝土构件受力性能数值研究
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摘要
分别以钢管混凝土三维有限元法和纤维单元法的应力-应变关系推导出了适于梁单元的应力-应变关系。以这两种方法得到钢管混凝土应力-应变关系,应用于梁单元法进行数值计算,分别对工程中最常出现的钢管混凝土轴压构件及偏压构件进行了计算,并将计算结果与已有的试验结果进行了比较。结果表明:以纤维单元法得到梁单元应力-应变关系在进行钢管混凝土构件数值分析时能取得理想的结果;以三维有限元法得到梁单元应力-应变关系,应用于方截面钢管混凝土构件时计算结果理想,而应用于圆截面钢管混凝土构件时与实验结果相比偏差较大。
The stress-strain relationships of concrete filled steel tube(CFST) beam element were concluded from the three-dimensional finite element method and the fiber element method.The axial loaded and eccentric compression CFST structures were computed through the beam element method with the two types of stress-strain relationship deduced.The numerical results were compared with the prior test results.The results showed that the accuracy was good when the stress-strain relationship of CFST concluded from fiber element was used.The results were accurate when the stress-strain relation obtained from the three-dimensional finite element method were used in studying square cross-section CFST structures,and the numerical result deviate from experimental results when the stress-strain relationship concluded from three dimensional finite element was used in computing circular cross-section CFST structures.
The stress-strain relationships of concrete filled steel tube(CFST) beam element were concluded from the three-dimensional finite element method and the fiber element method.The axial loaded and eccentric compression CFST structures were computed through the beam element method with the two types of stress-strain relationship deduced.The numerical results were compared with the prior test results.The results showed that the accuracy was good when the stress-strain relationship of CFST concluded from fiber element was used.The results were accurate when the stress-strain relation obtained from the three-dimensional finite element method were used in studying square cross-section CFST structures,and the numerical result deviate from experimental results when the stress-strain relationship concluded from three dimensional finite element was used in computing circular cross-section CFST structures.
引文
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[2]钱稼茹,康洪震.钢管高强混凝土组合柱抗震性能试验研究[J].建筑结构学报,2009,30(4):85-93.QIAN Jiaru,KANG Hongzhen.Experimental study onseismic behavior of high-strength concrete-filled steel tubecomposite columns[J].Journal of Building Structures,2009,30(4):85-93.
[3]刘威.钢管混凝土局部受压时的工作机理研究[D].福州:福州大学,2005.LIU Wei.Research on mechanism of concrete-filled steeltubes subjected to local compression[D].Fuzhou:FuzhouUniversity,2005.
[4]尧国皇.钢管混凝土构件在复杂受力状态下的工作机理研究[D].福州:福州大学,2006.YAO Guohuang.Research on behavior of concrete-filledsteel tubes subjected to complicated loading states[D].Fuzhou:Fuzhou University,2006.
[5]谢开仲.大跨度钢管混凝土拱桥非线性地震反应分析与研究[D].桂林:广西大学,2005.XIE Kaizhong.Nonlinear analysis and research of seismicresponse of long-span concrete filled steel tubular archbridge[D].Guilin:Guangxi University,2005.
[6]王勖成,劭敏.有限单元法基本原理和数值方法[M].北京:清华大学出版社,2002.WANG Xucheng,SHAO Min.The basic principle andnumerical method of finite element method[M].Beijing:Tsinghua University Press,2002.
[7]钟善桐.钢管混凝土力学[M].大连:大连理工大学出版社,1996.ZHONG Shantong.The mechanics of concrete filled steeltube[M].Dalian:Dalian University of Technology Press,1996.
[8]熊峰.钢管混凝土拱桥抗震性能研究[D].成都:四川大学,2001.XIONG Feng.Study on seismic behavior of concretefilled steel tubular arch bridges[D].Chengdu:Sichuan U-niversity,2001.
[9]陈宝春,陈友杰,王来永,等.钢管混凝土偏心受压应力-应变关系模型研究[J].中国公路学报,2004,17(1):24-28.CHEN Baochun,CHEN Youjie,WANG Laiyong,et al.Study of stress-strain relation of concrete filled steel tubu-lar eccentric compression column[J].China Journal ofHighway and Transport,2004,17(1):24-28.
[10]范立础.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu.Aseismic design of long-span bridge[M].Beijing:China Communications Press,2001.
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