| 四角锥系空间桁架的临界荷载 |
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| 引用本文： | 付波,丁圣果,郑涛,郑炜. 四角锥系空间桁架的临界荷载[J]. 贵州大学学报(自然科学版), 2009, 26(5): 101-104 |
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| 作者姓名： | 付波 丁圣果 郑涛 郑炜 |
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| 作者单位： | 贵州大学,土木建筑工程学院,贵州,贵阳,550003;贵州大学,土木建筑工程学院,贵州,贵阳,550003;贵州大学,土木建筑工程学院,贵州,贵阳,550003;贵州大学,土木建筑工程学院,贵州,贵阳,550003 |
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| 摘 要： | 根据刚度等效的原理,将四角锥系空间桁架比拟为实腹梁,分析桁架的等效弯、扭刚度对其临界荷载的影响,导出桁架的临界荷载计算公式。多个典型实际算例的计算结果与有限元结果的误差在±5％以内,满足工程设计计算精度要求。
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| 关 键 词： | 临界荷载 四角锥屋架 抗扭刚度 剪切影响 |
Critical Load of Quadrangular-Pyramid Space Truss |
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| FU Bo,DING Sheng-guo,ZHENG Tao,ZHENG Wei. Critical Load of Quadrangular-Pyramid Space Truss[J]. Journal of Guizhou University(Natural Science), 2009, 26(5): 101-104 |
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| Authors: | FU Bo DING Sheng-guo ZHENG Tao ZHENG Wei |
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| Affiliation: | (College of Civil Engineering, Guizhou University, Guiyang 550003, China) |
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| Abstract: | An analogy between quadrangular - pyramid space truss and solid - web girder can be made according to the theory of rigidity equivalent. The computing formula for the critical load of truss was derived by analyzing the effect of equivalent bending and torsional rigidity on the critical load. The deviation between computing results and finite element results of several real typical examples is in the range of negative five percent to positive five percent. It shows that the formula can satisfy the requirement of computing accuracy for engineering design. |
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| Keywords: | critical load quadrangular - pyramid roof truss torsional rigidity shearing effect |
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