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空间拱桥结构的稳定性分析及实用计算法
| 论文题名： | 空间拱桥结构的稳定性分析及实用计算法 |
| 关键词： | 拱桥结构;稳定性分析;finit element method;potential energy;modified method;buckling load;model test |
| 摘要： | This paper has investigeted the elastic and plastoelastic buckling problems of space structure and given the corresponding analytic programs. It studies the arch space system especially. Employing the principle of the minimum potential energy, the ela stic critical buckling load q of arch space system, composed of double main arch ribs, with inclination α and transverse bracing beams, is obtained. The factors of inclination α of ribs and the rigids of bracing beams have been studied. Depending on Da-yang river bridge, the model test has been developed further. Compari sions of the theoritical analysis with the results of experimental and computer method show that the critical buckling load q given by this paper might be simply used in design practice with sufficient accuracy. For plastoelastic buckling problem of arch, this paper has modified the method which used to caculate the reduction coefficient of plastoelastic problem early. Comparing to the results of finit element method, we know that this modified method is of dependable. |
| 作者： | 钱莲萍 |
| 导师： | 项海帆 |
| 授予学位单位： | 同济大学 |
| 学位年度： | 1987 |
| 正文语种： | 中文 |
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