| 体外预应力混凝土梁极限状态分析 |
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| 引用本文： | 牛斌.体外预应力混凝土梁极限状态分析[J].土木工程学报,2000,33(3):7-15. |
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| 作者姓名： | 牛斌 |
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| 作者单位： | 铁道部科学研究院 |
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| 摘 要： | 通过9片体外预应力混凝土梁静载试验的结果,建立了体外预应力混凝土梁极限状态下弯矩、挠度和体外预应力筋应力增量的简化计算方法;同时,采用此方法对国外二批体外预应力混凝土梁的试验结果进行分析计算,取得了很好的效果.证明该方法具有较强的通用性和良好的计算精度,为研究和设计各种体外预应力结构提供了一种可直接利用的公式.
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| 关 键 词： | 体外预应力 混凝土梁 体外钢筋 应力增量 挠度 二次影响 |
| 修稿时间： | 1999年6月14日 |
ULTIMATE ANALYSIS OF EXTERNALLY PRESTRESSED CONCRET BEAMS |
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| Niu Bin.ULTIMATE ANALYSIS OF EXTERNALLY PRESTRESSED CONCRET BEAMS[J].China Civil Engineering Journal,2000,33(3):7-15. |
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| Authors: | Niu Bin |
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| Affiliation: | China Academy of Railway Sciences |
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| Abstract: | A simpified design method is proposed. It can predicts the ultimate hehavior of fully or partially prestressed concretebeams with exernal post-tensioning tendons. The following variables are considered in the theoretical analysis: pereentage of reinforcement , strength of concrete, type of loading, configuration and initial stress of external tendons and second-order effects. Three groups of beams are tested and two groups of test data reported in PCI Journal 3] and ACI Journal 7] are an-alyzed. The theoretical ultiate moments, stress of external tendons and deflections are found agree with the test results. |
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| Keywords: | external prestressing concrete beams external tendons stress ultimate plastic hinge |
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