| 初始缺陷薄壁方钢管混凝土柱宽厚比研究 |
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| 引用本文： | 杨维英,高轩能,沈剑波.初始缺陷薄壁方钢管混凝土柱宽厚比研究[J].低温建筑技术,2011,33(9):36-38. |
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| 作者姓名： | 杨维英 高轩能 沈剑波 |
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| 作者单位： | 华侨大学土木工程学院,福建泉州,362021 |
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| 摘 要： | 引入折减系数α,考虑初始缺陷的影响,采用理论分析与有限元计算相结合的方法,研究有初始缺陷的薄壁钢管混凝土的宽厚比,通过局部屈曲判定曲线得出薄壁钢管的折减系数α在0.87以上.研究表明,初始缺陷使得薄壁钢管混凝土管壁的局部屈曲提前发生,并且随着钢管屈服强度的提高,这种不利影响越趋明显.
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| 关 键 词： | 初始缺陷 薄壁钢管混凝土 局部屈曲 |
RESEARCH ON FLAKINESS RATIO OF CONCRETE-FILLED SQUARE THIN-WALLED STEEL TUBULAR COLUMNS WITH INITIAL IMPERFECTION |
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| YANG Wei-ying,GAO Xuan-neng,SHEN Jian-bo.RESEARCH ON FLAKINESS RATIO OF CONCRETE-FILLED SQUARE THIN-WALLED STEEL TUBULAR COLUMNS WITH INITIAL IMPERFECTION[J].Low Temperature Architecture Technology,2011,33(9):36-38. |
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| Authors: | YANG Wei-ying GAO Xuan-neng SHEN Jian-bo |
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| Affiliation: | YANG Wei-ying,GAO Xuan-neng,SHEN Jian-bo (College of Civil Engineering,Huaqiao University,Fujian Quanzhou 362021,China) |
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| Abstract: | Considering the influence of initial imperfection, introducing the reduction factor of Through theoretical and finite element analysis, flakiness ratio of concrete-filled thin-walled steel tubes （CFTST） with initial imperfection was studied. Through the local buckling of thin-walled steel tube, we can get that the reduction factor is above 0. 87. The studies show that CFTST with initial imperfection are more prone to local buckling than perfect ones, and this tendency is more obvious with the yield increasing. |
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| Keywords: | initial imperfection concrete-filled thin-walled steel tube local buckling |
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