| 加劲十字形轴压杆考虑初始扭转缺陷的扭转位移函数 |
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| 引用本文： | 陈行威,宋振森.加劲十字形轴压杆考虑初始扭转缺陷的扭转位移函数[J].河北工程大学学报,2016,33(3):8-12,17. |
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| 作者姓名： | 陈行威 宋振森 |
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| 作者单位： | 上海交通 大学土木工程系, 上海 200240;上海交通 大学土木工程系, 上海 200240 |
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| 基金项目： | 国家自然科学基金资助项目（51278296） |
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| 摘 要： | 在小变形假定下推导了加劲十字形轴压杆考虑初始的扭转位移函数解,讨论了解的形态及其统一表达式,并与有限元进行了对比验证。分析表明,理论解与有限元结果吻合较好,当轴力小于0.4Afy时两者基本没有误差;轴力与构件跨中的扭转位移之间存在明显的二阶效应,跨中扭转位移的增加率随轴力的增加而增加;初始扭转缺陷对加劲十字形轴压杆有不利影响,其影响程度与其幅值基本呈线性关系。
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| 关 键 词： | 加劲十字形截面 轴心受压构件 扭转失稳 位移函数 |
| 收稿时间： | 2016/4/27 0:00:00 |
The torsional displacement function of centrally compressed stiffened cruciform column with initially twisted imperfection |
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| Authors: | CHEN Xingwei and SONG Zhensen |
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| Affiliation: | Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Based on the assumption of small deformation, this paper derives The torsional displacement function of centrally compressed stiffened cruciform column with initially twisted imperfection, gives its unified forms and discuss its property. A finite element model is developed and verified against the theoretical result. The study shows that results of FEM were generally in good agreement with the theoretical results when axial force is smaller then 0.4Afy. The is obvious second-order effect between axial force and torsional displacement. The initially twisted imperfection has negative effect on the centrally compressed stiffened cruciform column, and the degree of the influence has positive correlation with its amplitute. |
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| Keywords: | Stiffened cruciform columns Centrally compressed member Torsional buckling |
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