| 单层球面网壳失稳区域的平衡扰动 |
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| 引用本文： | 曾银枝,钱若军. 单层球面网壳失稳区域的平衡扰动[J]. 建筑科学, 2010, 26(1) |
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| 作者姓名： | 曾银枝 钱若军 |
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| 作者单位： | 1. 中国建筑科学研究院结构所,北京,100013
2. 同济大学建工系,上海,200092 |
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| 摘 要： | 在非线性分析的基础上,基于单层网壳结构的失稳机理,对临界点时的失稳区域进行平衡扰动。具体利用奇异值分解法对失稳区域进行几何稳定性判定,并得到相应可能发生的机构位移模态,根据最小势能原理求出失稳后的几何形态,使其进入后屈曲平衡路径。本文的方法是基于网壳结构失稳时的不稳定运动进行的,较为合理地反映了结构失稳的过程,对网壳结构稳定分析方法的进一步研究具有重要意义。
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| 关 键 词： | 网壳结构 失稳区域 矢跨比 分布规律 |
Research on the Equivalence Perturbation of Instability Regions of Single-Layer Spherical Latticed Domes |
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| ZENG Yin-zhi,QIAN Ruo-jun. Research on the Equivalence Perturbation of Instability Regions of Single-Layer Spherical Latticed Domes[J]. Building Science, 2010, 26(1) |
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| Authors: | ZENG Yin-zhi QIAN Ruo-jun |
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| Affiliation: | Institute of Building Structures/a>;China Academy of Building Research/a>;Beijing 100013/a>;China;Tongji University/a>;Shanghai 200092/a>;China |
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| Abstract: | Based on the principle of instability,for two types of latticed dome,the effect of rise-span ratios on the instability region is studied by the methods of tracing and distinguishing methods.And the relation between the elastic displacement and the instability region is discussed.The conclusions are meaningful to research and practice on the stability behavior of latticed domes. |
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| Keywords: | latticed domes instability region rise-span ratio regularity |
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