半刚性螺栓球节点单层球面网壳受力性能研究
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摘要
螺栓球结点为一种典型的半刚性节点,它具有一定的转动刚度,这种半刚性节点的网壳也具有一定的抗弯承载力,利用常用螺栓球节点的弯曲刚度,考虑了几何和材料非线性,利用常用有限元软件ANSYS对K8型和K6型螺栓球节点的单层球面网壳进行了弹塑性全过程分析,该文考虑了节点弯曲刚度、节点扭转刚度、跨度和矢跨比、节点域、荷载形式、杆件截面类型、支承条件等参数对网壳极限承载力的影响,得到了影响半刚性节点网壳受力性能的主要因素,较为全面的获得了螺栓球节点单层球面网壳的稳定性能。最后,该文根据前面分析所得结果,拟合出了无缺陷状态下,半刚性球面网壳的极限承载力公式,为网壳设计提供了参考。
A bolt-ball joint system is a typical semi-rigid system.Therefore, a single layer reticulated dome with bolt-ball joints can bear certain amount of bending moment.Based on the bending stiffness curves of a bolt-ball joint[1], considering the geometric non-linearity and material non-linearity, the K8 and K6 single-layer reticulated domes with a bolt-joint system have been analyzed in detail using the finite element software ANSYS based on several different parameters including bending stiffness, torsional stiffness, ratio of rise to span, ball size, load distribution, tube section, support condition in this paper, and key parameters having influence on the load carrying capacity of a dome are thus identified.The overall stability characters of a single-layer reticulated dome with a bolt-ball joint system are obtained.Finally, based on the results obtained by the parametric analysis, a new formula is proposed, which allows designers a rapid estimation of buckling loads for semi-rigid jointed single-layer latticed domes.
A bolt-ball joint system is a typical semi-rigid system.Therefore, a single layer reticulated dome with bolt-ball joints can bear certain amount of bending moment.Based on the bending stiffness curves of a bolt-ball joint[1], considering the geometric non-linearity and material non-linearity, the K8 and K6 single-layer reticulated domes with a bolt-joint system have been analyzed in detail using the finite element software ANSYS based on several different parameters including bending stiffness, torsional stiffness, ratio of rise to span, ball size, load distribution, tube section, support condition in this paper, and key parameters having influence on the load carrying capacity of a dome are thus identified.The overall stability characters of a single-layer reticulated dome with a bolt-ball joint system are obtained.Finally, based on the results obtained by the parametric analysis, a new formula is proposed, which allows designers a rapid estimation of buckling loads for semi-rigid jointed single-layer latticed domes.
引文
[1]Makowski Z S.Space structures of today and tomorrow[R].Nooshin H,editor.Third International Conference on Space Structures).London:Elsevier Applied Science Publishers Ltd,1984:1―8.
[2]沈世钊,陈昕.网壳结构稳定性[M].北京:科学技术出版社,1999.Shen Shizhao,Chen Xin.Stability of reticulated shells[M].Beijing:The Science Publisher,1999.(in Chinese)
[3]罗永峰.网壳结构弹塑性稳定及承载力全过程分析[D]上海:同济大学,1991.Luo Yongfeng.Elasto-plastic stability and load bearing process analysis of reticulated domes[D].Shanghai:Tongji University,1991.(in Chinese)
[4]林有军.单层穹顶网壳稳定性分析[D].哈尔滨:哈尔滨建筑大学,1996.Lin Youjun.Stability of single-layer domes[D].Harbin:Harbin Architectural and Civil Engineering Institute,1996.(in Chinese)
[5]马会环.半刚性节点单层球面网壳稳定性及其节点性能研究[D].哈尔滨:哈尔滨工业大学,2007.Ma Huihuan.Stability analysis of semi-rigidity single-layer reticulated shells and its joint system[D].Harbin:Harbin Institute of Technology,2007.(in Chinese)
[6]崔美艳.半刚性节点单层球面网壳整体稳定性分析[D].哈尔滨:哈尔滨建筑大学,2006.Cui Meiyan.Stability analysis of single layer reticulated shells with semi-rigidity of joint system[D].Harbin:Harbin Architectural and Civil Engineering Institute,2006.(in Chinese)
[7]Ma H H,Fan F,Shen S Z.Numerical parametric investigation of single-layer latticed domes with semi-rigid joints[J].Journal of the International Association for Shell and Spatial Structures,2008,49(2):99―110.
[8]张传成,张宝勤,张爱林.节点刚度对2008奥运羽毛球热身馆单层网壳稳定性影响研究[J].世界地震工程,2007,23(3):32―40.Zhang Chuancheng,Zhang Baoqin,Zhang Ailin.Stability behavior of joint stiffness on the single-layer reticulated shell of badminton arena for2008Olympic Games[J].World Earthquake Engineering,2007,23(3):32―40.(in Chinese)
[9]Kato S,Mutoh I,Shomura M.Collapse of semi-rigidly jointed reticulated domes with initial geometric imperfections[J].Journal of Constructional Steel Research,1998,48:145―168.
[10]Sohn S D,Kim S D,Kang M M.Nonlinear instability structures in civil engineering[C].Proceedings of the IASS International Symposium,2002:422―427.
[2]沈世钊,陈昕.网壳结构稳定性[M].北京:科学技术出版社,1999.Shen Shizhao,Chen Xin.Stability of reticulated shells[M].Beijing:The Science Publisher,1999.(in Chinese)
[3]罗永峰.网壳结构弹塑性稳定及承载力全过程分析[D]上海:同济大学,1991.Luo Yongfeng.Elasto-plastic stability and load bearing process analysis of reticulated domes[D].Shanghai:Tongji University,1991.(in Chinese)
[4]林有军.单层穹顶网壳稳定性分析[D].哈尔滨:哈尔滨建筑大学,1996.Lin Youjun.Stability of single-layer domes[D].Harbin:Harbin Architectural and Civil Engineering Institute,1996.(in Chinese)
[5]马会环.半刚性节点单层球面网壳稳定性及其节点性能研究[D].哈尔滨:哈尔滨工业大学,2007.Ma Huihuan.Stability analysis of semi-rigidity single-layer reticulated shells and its joint system[D].Harbin:Harbin Institute of Technology,2007.(in Chinese)
[6]崔美艳.半刚性节点单层球面网壳整体稳定性分析[D].哈尔滨:哈尔滨建筑大学,2006.Cui Meiyan.Stability analysis of single layer reticulated shells with semi-rigidity of joint system[D].Harbin:Harbin Architectural and Civil Engineering Institute,2006.(in Chinese)
[7]Ma H H,Fan F,Shen S Z.Numerical parametric investigation of single-layer latticed domes with semi-rigid joints[J].Journal of the International Association for Shell and Spatial Structures,2008,49(2):99―110.
[8]张传成,张宝勤,张爱林.节点刚度对2008奥运羽毛球热身馆单层网壳稳定性影响研究[J].世界地震工程,2007,23(3):32―40.Zhang Chuancheng,Zhang Baoqin,Zhang Ailin.Stability behavior of joint stiffness on the single-layer reticulated shell of badminton arena for2008Olympic Games[J].World Earthquake Engineering,2007,23(3):32―40.(in Chinese)
[9]Kato S,Mutoh I,Shomura M.Collapse of semi-rigidly jointed reticulated domes with initial geometric imperfections[J].Journal of Constructional Steel Research,1998,48:145―168.
[10]Sohn S D,Kim S D,Kang M M.Nonlinear instability structures in civil engineering[C].Proceedings of the IASS International Symposium,2002:422―427.
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