| 预应力钢管混凝土组合构件的稳定性研究 |
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| 引用本文： | 陈波. 预应力钢管混凝土组合构件的稳定性研究[J]. 力学与实践, 2006, 28(3): 30-33 |
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| 作者姓名： | 陈波 |
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| 作者单位： | 兰州交通大学土木工程学院,兰州,730070 |
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| 摘 要： | 给出了预应力筋初始张拉力和有效张拉力的计算方法．根据弹性力学理论和能量法原理,建立了组合构件挠曲微分方程,推导了各种边界条件的预应力钢管混凝土组合构件的压屈载荷计算公式,并由强度条件确定了界限长细比．算例分析表明,对超过界限长细比的钢管混凝土组合构件,施加预应力可以有效地提高其稳定承载力．
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| 关 键 词： | 预应力 钢管混凝土 压屈荷载 |
| 收稿时间： | 2005-07-20 |
| 修稿时间： | 2006-02-22 |
THE STABILITY OF THE PRESTRESSED CONCRETE FILLED STEEL TUBULAR MEMBER |
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| CHEN Bo. THE STABILITY OF THE PRESTRESSED CONCRETE FILLED STEEL TUBULAR MEMBER[J]. Mechanics and Engineering, 2006, 28(3): 30-33 |
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| Authors: | CHEN Bo |
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| Affiliation: | School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract: | The calculating methods of the initial force and effective tensile force of prestressing tendon are given in this paper. The differential equation for the prestressed concrete filled steel tubular member is established, and the formulas for buckling load of the composite members are derived by using the theory of elasticity and the energy principle. On the basis of the strength condition, the limit slenderness ratio is deduced. The numerical examples show that the stability bearing capacity of the prestressed concrete filled steel tubular member exceeding the limit slenderness ratio can be raised by prestressing. |
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| Keywords: | prestress concrete filled steel tube buckling load |
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