| 单轴对称工字形截面圆弧拱的屈曲分析 |
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| 引用本文： | 许强,童根树. 单轴对称工字形截面圆弧拱的屈曲分析[J]. 建筑结构学报, 2001, 22(3): 64-69 |
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| 作者姓名： | 许强 童根树 |
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| 作者单位： | 浙江大学建筑工程学院!浙江杭州310027,浙江大学建筑工程学院!浙江杭州310027 |
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| 基金项目： | 国家自然科学基金项目!(59778037)资助 |
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| 摘 要： | 根据文献[1]提出的任意开口薄壁截面圆弧曲梁的翘曲位移表达式，本文利用能量原理导出了单轴对称工字形截面拱的稳定平衡方程。文中主要对工字形截面拱在均布径向荷载 (均匀受压 )和两端作用大小相等、方向相反的端弯矩 (均匀弯曲 )条件下的弯扭屈曲进行分析，给出临界荷载的理论解答；考虑了工字形截面不同放置时拱失稳模式的不同，分析截面不对称性对临界荷载的影响，并与已有的文献进行比较。
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| 关 键 词： | 单轴对称 工字形 弯扭失稳 圆弧拱 |
| 文章编号： | 1000-6869(2001)03-0064-06 |
| 收稿时间： | 2001-06-05 |
| 修稿时间： | 2001-06-05 |
Buckling of Mono-symmetric I-section Circular Arches |
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| XU Qiang,TONG Genshu. Buckling of Mono-symmetric I-section Circular Arches[J]. Journal of Building Structures, 2001, 22(3): 64-69 |
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| Authors: | XU Qiang TONG Genshu |
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| Affiliation: | XU Qiang,TONG Genshu (College of Civil Engineering and Architecture,Zhejiang University,Hangzhou,China) |
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| Abstract: | The flexural-torsional buckling of arches has been investigated theoretically by a number of authors.But most papers are restricted to double- symmetric cross- sections.Starting from warping displacement for arbitrary thin- walled curved beams in Ref.[1],the principle of energy is applied to derive the differential equation of stability for mono- symmetric I- section arches.Rigorous solutions are obtained for arches subjected to uniformly distributed radial load as well as to equal and opposite end moments.Effects of different laying positions and of asymmetry of cross-section on buckling loads are included.The solutions are compared with previous theoretical results. |
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| Keywords: | circular arch mono-symmetry I-section flexural-torsional buckling |
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