偏心受压作用下铸钢分叉节点受力性能试验研究
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摘要
为了了解树状柱结构中的铸钢分叉节点在轴力和弯矩共同作用下的受力性能,对一个典型的铸钢三分叉节点进行了足尺模型偏心受压试验,试验在1 000t微机控制电液伺服压力试验机上进行,对铸钢三分叉节点主管进行偏心加载,偏心距200mm,分析了节点的位移变化和应力分布特征。采用Solid Works软件建立与试验节点相对应的分析模型,然后导入ANSYS软件对该节点进行有限元计算,将其计算结果与试验结果进行对比。进而提出了基于主管破坏的节点承载力计算公式。研究结果表明,试验结果、有限元计算结果及承载力计算公式计算的结果三者吻合较好,节点在受压侧与受拉侧的应力水平差异明显,弯矩作用影响显著。
In order to understand the mechanical behavior of the cast-steel joints with branches in the tree-like column structure under the action of axial force and bending moment,a typical cast-steel three-branch joint was subjected to the full-scale model eccentric compression test. The experiment was carried out on a 1 000 t micro-computer controlled electro-hydraulic servo pressure tester. The main pipe of cast-steel three-branch joint was loaded eccentrically with an eccentricity of 200 mm. The displacement variation and stress distribution characteristics of the joint were analyzed.Solid Works software was used to establish the analysis model corresponding to the test node,and then ANSYS software was imported to calculate the joint by finite element method,and the results of calculation were compared with the test results.Furthermore,a formula for calculating the bearing capacity of joints based on the failure of the main pipe was proposed. The results show that the test results,the finite element calculation results and the calculation results of bearing capacity calculation formula are in good agreement. The stress levels of the joints at the compression side and the tension side are obviously different,and the bending moment effect is significant.
In order to understand the mechanical behavior of the cast-steel joints with branches in the tree-like column structure under the action of axial force and bending moment,a typical cast-steel three-branch joint was subjected to the full-scale model eccentric compression test. The experiment was carried out on a 1 000 t micro-computer controlled electro-hydraulic servo pressure tester. The main pipe of cast-steel three-branch joint was loaded eccentrically with an eccentricity of 200 mm. The displacement variation and stress distribution characteristics of the joint were analyzed.Solid Works software was used to establish the analysis model corresponding to the test node,and then ANSYS software was imported to calculate the joint by finite element method,and the results of calculation were compared with the test results.Furthermore,a formula for calculating the bearing capacity of joints based on the failure of the main pipe was proposed. The results show that the test results,the finite element calculation results and the calculation results of bearing capacity calculation formula are in good agreement. The stress levels of the joints at the compression side and the tension side are obviously different,and the bending moment effect is significant.
引文
[1]刘波,刘宏,荆向晓.广西体育中心游泳跳水馆复杂铸钢节点设计研究[J].建筑结构,2013,43(24):58-62.
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[4]刘钊,贺志启,苏俭.铸钢节点在轻型桥梁结构中的应用研究[J].世界桥梁,2011,19(5):31-34.
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[7]杜文风,孙志飞,高博青,等.树状结构三分叉铸钢节点有限元分析[J].建筑结构学报,2014,35(S1):89-94.
[8]吴卫华,董正方,杜文风.树状结构空间四分叉铸钢节点抗弯极限承载力分析[J].河南大学学报(自然科学版),2015,45(4):482-486.
[9] HUNT J,HAASE W,SOBEK W. A design tool for spatial tree structures[J]. Journal of the International Association for Shell and Spatial Structures,2009,50(1):3-10.
[10] TANG K K. Evolution of plastic damage in welded joint of steel truss with pre-existing defects[J]. Theoretical and Applied Fracture Mechanics,2010,54(2):117-126.
[2]杨渊,陈志华,马克俭,等.铸钢结构设计与工程应用[J].建筑结构,2016,46(7):44-51.
[3]吴卫华,杜文风.树状柱结构空间四分叉铸钢节点受力性能分析[J].河南大学学报(自然科学版),2014,44(6):738-742.
[4]刘钊,贺志启,苏俭.铸钢节点在轻型桥梁结构中的应用研究[J].世界桥梁,2011,19(5):31-34.
[5] ZHAO X L,TONG L W. New development in steel tubular Joints[J]. Advances in Structural Engineering,2011,14(4):699-715.
[6]孙志飞.树状结构分叉节点理论研究[D].开封:河南大学,2014.
[7]杜文风,孙志飞,高博青,等.树状结构三分叉铸钢节点有限元分析[J].建筑结构学报,2014,35(S1):89-94.
[8]吴卫华,董正方,杜文风.树状结构空间四分叉铸钢节点抗弯极限承载力分析[J].河南大学学报(自然科学版),2015,45(4):482-486.
[9] HUNT J,HAASE W,SOBEK W. A design tool for spatial tree structures[J]. Journal of the International Association for Shell and Spatial Structures,2009,50(1):3-10.
[10] TANG K K. Evolution of plastic damage in welded joint of steel truss with pre-existing defects[J]. Theoretical and Applied Fracture Mechanics,2010,54(2):117-126.