| 大跨径桥梁施工控制温度荷载 |
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| 引用本文： | 刘来君.大跨径桥梁施工控制温度荷载[J].长安大学学报(自然科学版),2003,23(2):61-63,87. |
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| 作者姓名： | 刘来君 |
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| 作者单位： | 长安大学,公路学院,陕西,西安,710064 |
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| 摘 要： | 针对温度变化对大跨径桥梁施工控制的影响，在分析温度荷载特点的基础上，根据变分原理，研究了变分法确定桥梁结构的某一特定温度分布，对于结构重要结点的分析，可采用温度场有限元分析方法来确定最不利温度分布，对于结构整体分析问题，可将空间温度场简记为工程变量分离的最不利温度分布；提出了温度场分布的简化处理方法，即实用温度分布函数－半径验半理论公式；以供桥梁设计和施工控制时参考。
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| 关 键 词： | 大跨径桥梁 施工控制 温度荷载 变分法 |
| 文章编号： | 1671-8879(2003)02-0061-03 |
Temperature load of construction controlling for long-span bridge |
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| LIU Lai-jun.Temperature load of construction controlling for long-span bridge[J].JOurnal of Chang’an University:Natural Science Edition,2003,23(2):61-63,87. |
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| Authors: | LIU Lai-jun |
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| Abstract: | The change of tempperature has an influence on construction controlling for long-span bridge.On the basis of analysing the features of temperature load,a certain temperature distribution in bridge structure was confirmed with variational principle.As for the analysis of important joints in structure, FEM of temperature field was utilized to confirm the worst-case of temperature distribution. As for the analysis of whole structure, the space temperature field can be simplified as the worst-case of temperature distribution by two-dimension speparation of variables.A simple meathod was put forward to deal with the temperature distribution,that is the useful distribution function of temperature,semi-empirical and semi-theoretical formula.These can give reference to the design and construction of bridge. |
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| Keywords: | long-span bridge construction controlling temperature load calculus of variation |
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