中文核心期刊
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中国科技核心期刊
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Journal of Chongqing Jiaotong University(Natural Science)

Journal of Chongqing Jiaotong University(Natural Science) ›› 2010, Vol. 29 ›› Issue (1): 20-22.

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Modification of Virtual Displacement Based on Unstressed State Method

TIAN Wei-feng1,2，ZHOU Shui-xing2，QIN Zhen3   

  1. 1.School of Civil Engineering，Chongqing University，Chongqing 400045，China; 2.School of Civil Engineering ＆ Architecture，Chongqing Jiaotong University，Chongqing 400074，China; 3.Chongqing Highway Engineering Quality Supervision Station，Chongqing 400060，China
  • Received:2009-07-09 Online:2010-02-15 Published:2015-01-22

基于无应力状态法的零杆虚位移修正

田维锋1,2，周水兴2，秦镇3   

  1. 1.重庆大学土木工程学院，重庆 400045;2.重庆交通大学土木建筑学院，重庆 400074; 3.重庆公路工程质监站，重庆 400060
  • 作者简介:田维锋(1976—)，男，重庆市人，讲师，博士研究生，主要研究领域为大跨度桥梁设计与结构非线性分析。E-mail:zylgghnt@126.com 。
  • 基金资助:
    重庆市交委重点科研项目(WFKY-003-40117)

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Abstract: The causes of virtual displacement in long-span cable-stayed bridge construction control and structural analysis have been analyzed. The calculation errors which are resulted from the virtual displacement have also been described. The error modification method based on unstressed state theory is proposed. The effectiveness of the modified method has been verified through examples. The proposed method is of reference value for FEM error analysis of bridge.

Key words: death element, unstressed state method, virtual displacement, tangent installation, error modification

摘要： 分析了大跨径斜拉桥施工控制和结构分析中零杆虚位移的成因及其导致的计算误差，提出了基于无应力状 态法理论的误差修正方法。通过算例验证，表明该方法是有效的，对于桥梁的有限元误差分析具有一定参考价值。

关键词: 零杆单元, 无应力状态法, 虚位移, 切线安装, 误差修正

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