| K6型单层球面网壳的弹塑性稳定 |
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| 引用本文： | 曹正罡,范峰,沈世钊. K6型单层球面网壳的弹塑性稳定[J]. 空间结构, 2005, 11(3): 22-26 |
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| 作者姓名： | 曹正罡 范峰 沈世钊 |
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| 作者单位： | 哈尔滨工业大学土木工程学院,黑龙江,哈尔滨,150090;哈尔滨工业大学土木工程学院,黑龙江,哈尔滨,150090;哈尔滨工业大学土木工程学院,黑龙江,哈尔滨,150090 |
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| 基金项目： | 国家自然科学基金重点项目（50338010）;国家自然科学基金面上项目（50278020）. |
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| 摘 要： | 本文有计划地对1200余例实际尺寸的K6型单层球面网壳进行了双重非线性全过程分析,求得了它们的极限承载力,系统地考察了初始缺陷和荷载不对称分布等因素对网壳性能的影响,并重点讨论了材料非线性对网壳极限承载力的影响.通过这种大规模参数分析研究,较全面了解了K6型单层球面网壳弹塑性稳定性能的规律,在此基础上对以往仅考虑几何非线性的网壳极限稳定承载力实用公式进行了修正.
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| 关 键 词： | 单层球面网壳 稳定 极限承载力 弹塑性 |
| 文章编号： | 1006-6578(2005)03-0022-05 |
| 收稿时间： | 2005-02-27 |
| 修稿时间： | 2005-02-27 |
Elastic-plastic stability of K6 single layer latticed domes |
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| CAO Zheng-gang,FAN Feng,SHEN Shi-zhao. Elastic-plastic stability of K6 single layer latticed domes[J]. Spatial Structures, 2005, 11(3): 22-26 |
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| Authors: | CAO Zheng-gang FAN Feng SHEN Shi-zhao |
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| Abstract: | Considering both geometrical nonlinear and material nonlinear, a complete-process analysis of more than 1200 K6 single-layer latticed domes has been carried out to obtain the critical load of the domes. The effect of initial imperfections and possible unsymmetrical action of loads on structural behavior are studied systematically, and the effect of material nonlinear on the critical load was also discussed. Base upon a comprehensive parametric analysis, the elastic-plastic stability behaviour of K6 single-layer latticed domes was understood, and then former practical formulas for predicting critical loads of real latticed dome structure, which considering only geometrical nonlinear, were revised. |
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| Keywords: | single layer latticed domes stability critical loads elastic-plastic |
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