| 焊接空心球在对称环线荷载作用下的非线性稳定 |
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| 引用本文： | 罗永峰,黄奎生.焊接空心球在对称环线荷载作用下的非线性稳定[J].上海力学,1999,20(3):331-336. |
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| 作者姓名： | 罗永峰 黄奎生 |
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| 作者单位： | 同济大学土木工程学院，同济大学土木工程学院，同济大学土木工程学院 上海 200092，上海 200092，上海 200092 |
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| 摘 要： | 本文针对目前广泛应用于网架与网壳结构中的薄壁空心球节点，对薄壁球壳在环线荷载作用下的非线性稳定性态进行了分析研究。应用Ｂ－样条函数及截断单项式。克服了理论分析中因剪力突变所带来的困难。数值分析结果表明，薄壳的非线笥稳定是工程中常用的空心球节点的控制因素。同时又表明现行规程公式的计算结果大于数值分析结果。
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| 关 键 词： | 薄壁空心球 环绕荷载 非线性 稳定性 网架结构 |
NONLINEAR STABILITY OF HOLLOW SPHERICAL JOINTS UNDER SYMMETRIC CIRCULAR-DISTRIBUTED LOADS |
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| Luo Yongfeng Huang Kuisheng Li Qiuzhan.NONLINEAR STABILITY OF HOLLOW SPHERICAL JOINTS UNDER SYMMETRIC CIRCULAR-DISTRIBUTED LOADS[J].Chinese Quarterly Mechanics,1999,20(3):331-336. |
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| Authors: | Luo Yongfeng Huang Kuisheng Li Qiuzhan |
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| Abstract: | Thin spherical shell joints are widely used in space trusses and grid shells. In this paper, the nonlinear stability behavior of the joints under the uniformly circular line loads is investigated and analyzed. B-spine functions and truncated monomials are introduced for the theoretical solution of the nonlinear equations with the severe discontinuity of shear in the thin spherical joints. The numerical results show that the nonlinear stability of thin shell is tha predominant factor in joint design. The critical loads or loading capacity of the spherical shell joints calculated from the formula in present design code (JGJ7-91) are larger than that from the numerical analysis. |
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| Keywords: | thin spherical joint circular line load nonlinear stability |
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