| 应用空间嵌入式实体组合单元分析PC桥梁结构 |
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| 引用本文： | 龙佩恒,陈惟珍.应用空间嵌入式实体组合单元分析PC桥梁结构[J].同济大学学报(自然科学版),2007,35(4):455-460. |
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| 作者姓名： | 龙佩恒 陈惟珍 |
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| 作者单位： | 1. 同济大学桥梁工程系,上海,200092;北京建筑工程学院土木工程系,北京,100044
2. 同济大学桥梁工程系,上海,200092 |
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| 摘 要： | 根据预应力混凝土桥梁的受力特性，应用有限元方法的基本原理，推导出包含预应力钢筋贡献的嵌入式预应力混凝土组合单元列式．力学概念明确，算例证明计算结果可靠．应用嵌入式组合单元模型，在单元划分时不必考虑预应力钢筋的布束方式，预应力钢筋单元可随意穿过混凝土单元，为解决非节点荷载向实体单元节点荷载转换提供了一种行之有效的技术手段，为正确分析空间曲线布束的预应力混凝土桥梁结构提供了一种实用算法．
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| 关 键 词： | 预应力混凝土桥梁 曲线布束 嵌入式组合单元 非节点荷载 |
| 文章编号： | 0253-374X（2007）04-455-06 |
| 修稿时间： | 2005-08-05 |
Spatial Embedded Reinforcement of 20-node Block Element for Analysis of PC Bridges |
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| LONG Peiheng,CHEN Weizhen.Spatial Embedded Reinforcement of 20-node Block Element for Analysis of PC Bridges[J].Journal of Tongji University(Natural Science),2007,35(4):455-460. |
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| Authors: | LONG Peiheng CHEN Weizhen |
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| Institution: | 1. Department of Bridge Engineering, Tongji University, Shanghai 200092, China; 2. Department of Civil Engineering,Beijing Institute of Civil Engineering and Architecture, Beijing 100044, China |
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| Abstract: | The formula of embedded reinforcement element containing the contribution ot prestressea reinforcement is derived according to mechanical behavior of PC bridges and basic principle of finite element method. The mechanical concept is well-defined and examples validate the calculation results. Reinforcement element model allows generating a finite element mesh without considering the layout of reinforcements. Furthermore, the prestressing tendon may pass through the concrete elements in an arbitrary manner, It is an effective approach that the no-node loads are diverted from the tendons to the adjacent concrete elements. A utility arithmetic to analyze spatial curved tendon PC bridges is provided. |
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| Keywords: | prestressed concrete bridges curved tendon embedded reinforcement elements no-node load |
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