| 外张预应力钢筋混凝土结构非线性有限元分析 |
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| 引用本文： | 吴晓涵,吕西林. 外张预应力钢筋混凝土结构非线性有限元分析[J]. 建筑结构学报, 2001, 22(5): 1-5 |
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| 作者姓名： | 吴晓涵 吕西林 |
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| 作者单位： | 同济大学结构工程与防灾研究所,同济大学结构工程与防灾研究所 上海200092,上海200092 |
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| 基金项目： | 国家杰出青年基金项目（50025821）资助。 |
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| 摘 要： | 本文提出了一种用于外张预应力钢筋混凝土结构非线性分析的单元模型，此模型可模拟外张预应力钢筋在转向点处的滑移和摩擦作用。将这一单元模型与混凝土和钢筋单元模型相组合，建立了外张预应力钢筋混凝土结构非线性分析程序，非线性方面包括了材料和几何非线性。该有限元模型可用于外张预应力钢筋混凝土结构从张拉施工至使用阶段的全过程分析，分析内容包括弹塑性变形、混凝土开裂和破坏等。最后给出的实例表明模型计算分析结果与试验结果[１］吻合良好。
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| 关 键 词： | 非线性分析 有限元 预应力钢筋混凝土 |
| 文章编号： | 1000-6869(2001)05-0001-05 |
| 收稿时间： | 2001-10-05 |
| 修稿时间： | 2001-10-05 |
Nonlinear Finite Element Analysis ot Externally Prestressed Concrete Structures |
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| WU Xiaohan,LU Xilin. Nonlinear Finite Element Analysis ot Externally Prestressed Concrete Structures[J]. Journal of Building Structures, 2001, 22(5): 1-5 |
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| Authors: | WU Xiaohan LU Xilin |
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| Affiliation: | WU Xiaohan,LU Xilin(Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai,China) |
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| Abstract: | The present study describes a nonlinear analysis model developed for externally prestressed structures. This model is capable of simulating the slip of tendon on the deviator and the friction at the interface of tendon and deviator. Combining the model with concrete and reinforcing steel models, a computer program for material and geometric nonlinear analysis of externally prestressed concrete structures has been developed. The numerical procedure can predict the responses of externally prestressed concrete structures throughout their prestressing transfer and service load history, such as elastic and plastic deformation, cracking and damage patterns. An example has been analyzed to verify its capability and effi-ciency. Analytical and experimental results show good agreement with each other. |
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| Keywords: | prestressed concrete finite element method nonlinear analysis |
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