| 局部张拉预应力筋加固混凝土超静定梁的内力计算 |
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| 引用本文： | 王新玲,曹双寅.局部张拉预应力筋加固混凝土超静定梁的内力计算[J].东南大学学报(自然科学版),2004,34(1):89-91. |
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| 作者姓名： | 王新玲 曹双寅 |
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| 作者单位： | 东南大学土木工程学院,南京,210096;东南大学土木工程学院,南京,210096 |
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| 摘 要： | 针对局部张拉预应力筋加固混凝土超静定梁内力,采用结构力学方法进行了计算分析.首先讨论了不等跨连续梁在不同部位张拉预应力筋时的内力计算,得出了加固结构不同截面时超静定梁内支座产生的主、次弯矩及综合弯矩的计算表达式.在此基础上,分析了等跨连续梁的内力计算,根据叠加原理,即可得到超静定梁多个截面同时加固时的总弯矩.论文还分析了预应力筋位置对加固连续梁内力的影响.所得出的结果可作为局部张拉预应力筋加固混凝土等跨及不等跨连续梁内力计算的依据.
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| 关 键 词： | 局部张拉 体外预应力 加固 混凝土超静定梁 |
| 文章编号： | 1001-0505(2004)01-0089-03 |
Inner force on strengthening concrete statically indeterminate beams prestressed with localized tendons |
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| Wang Xinling,Cao Shuangyin.Inner force on strengthening concrete statically indeterminate beams prestressed with localized tendons[J].Journal of Southeast University(Natural Science Edition),2004,34(1):89-91. |
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| Authors: | Wang Xinling Cao Shuangyin |
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| Abstract: | The use of localized tendons to prestress statically indeterminate beams is examined. The two spans continuous beams should be calculated to determine the prestressing moments produced by localized tendons. Based on the analysis, the moments formulas should be computed, which will lead to strengthening the RC continuous beams of the three spans prestressed with localized tendons. By means of the principle of superposition, total moments can be obtained when many sections should be strengthened. The effects of the continuous beams' moments produced location of prestressing are analyzed. The results should be used to design concrete continuous beams of two and three spans prestressed with localized tendons. |
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| Keywords: | localized tendon external prestressing strengthen concrete statically indeterminate beams |
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