| 节段施工体外预应力混凝土梁弯曲性能研究 |
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| 引用本文： | 曾永革,李传习.节段施工体外预应力混凝土梁弯曲性能研究[J].工程力学,2011(1). |
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| 作者姓名： | 曾永革 李传习 |
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| 作者单位： | 邵阳学院城市建设系;长沙理工大学土木与建筑学院; |
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| 基金项目： | 国家自然科学基金项目(50778024); 湖南省教育厅科研项目(09C768) |
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| 摘 要： | 节段施工体外预应力混凝土梁接缝受力行为的模拟,是能否进行可靠的有限元分析的关键。根据接缝处不同部位混凝土和钢筋的受力特点,建立了能够模拟接缝工作的计算模型,开发出能够对体外预应力梁进行全过程仿真分析的非线性有限元程序。应用所编程序,对Angel C.Aparicio等人的节段式体外预应力混凝土试验梁,分别改变其相应参数,进行弯曲性能分析。分析结果表明:接缝位置处的单元与普通梁段的单元并没有本质不同,其差异在于决定梁单元刚度亦即参与工作的材料有所不同;普通钢筋配筋率对节段较短的体外预应力梁抗弯性能基本没有影响;体外索初始张拉力、布筋形式和节段划分数目对节段施工体外预应力梁的弯曲性能分别有不同程度的影响。
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| 关 键 词： | 桥梁工程 体外预应力 仿真分析 计算模型 弯曲性能 |
ANALYSIS ON FLEXUAL BEHAVIOR OF SEGMENTAL EXTERNALLY PRE-STRESSED CONCRETE BEAMS |
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| ZENG Yong-ge,LI Chuan-xi.ANALYSIS ON FLEXUAL BEHAVIOR OF SEGMENTAL EXTERNALLY PRE-STRESSED CONCRETE BEAMS[J].Engineering Mechanics,2011(1). |
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| Authors: | ZENG Yong-ge LI Chuan-xi |
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| Affiliation: | ZENG Yong-ge1,2,LI Chuan-xi2(1.Department of Urban Construction,Shaoyang University,Shaoyang,Hunan 422000,China,2.School of Civil Engineering and Architecture,Changsha University of Science and Technology,Changsha,Hunan 410076,China) |
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| Abstract: | The simulation of the seam behavior is a key to analyze the segmental externally pre-stressed beam with finite element method.Based on the force characteristics of the reinforcements and concrete in different parts of the joint,a numerical model which can simulate the workings of the joint is presented and a nonlinear finite element program which can simulate the working process of externally pre-stressed concrete beams is developed.With the program,the factors of an experimental beam made by Angel C.Aparic... |
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| Keywords: | bridge engineering externally pre-stressing simulation analysis calculation model flexural behavior |
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