| 钢桥自适应分析 |
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| 引用本文： | 原海燕,阎贵平,刘磊.钢桥自适应分析[J].北京交通大学学报(自然科学版),2008,32(1):69-73. |
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| 作者姓名： | 原海燕 阎贵平 刘磊 |
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| 作者单位： | 北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044 |
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| 摘 要： | 自适应分析是钢桥塑性分析理论的一个新方向,它以重复载荷作用下结构的自适应现象为基础,挖掘结构的承载潜力.本文以连续钢梁桥为对象,分析了重复载荷作用下结构的特殊行为,以一个两跨连续梁为例,用增量分析法计算了结构的自适应极限载荷.分析表明:结构自适应的必要条件是卸载过程中不出现弯矩重分配;增量分析法原理清晰,适于编程.
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| 关 键 词： | 土木建筑结构 钢梁桥 自适应分析 增量分析法 |
| 文章编号： | 1673-0291（2008）01-0069-05 |
| 收稿时间： | 2006-10-24 |
| 修稿时间： | 2006年10月24 |
Shakedown Analysis of Steel Girder Bridge |
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| YUAN Haiyan,YAN Guiping,LIU Lei.Shakedown Analysis of Steel Girder Bridge[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2008,32(1):69-73. |
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| Authors: | YUAN Haiyan YAN Guiping LIU Lei |
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| Abstract: | The shakedown analysis is a new research direction of the plastic theory for steel girder bridges.Based on the shakedown phenomenon of a structure subjected to repeated loads,the potential capacity of the structure can be got.Some special behaviors are concluded when continuous steel girder bridges bear repeated loads.Taking a two-span continuous beam as an example,its shakedown limit loads are calculated with the loading incremental method.The analytical results indicate that the necessary condition of shakedown is no redistribution of bending moment when the beam is unloading.The results also show that the loading incremental method is precise for shakedown analysis and is fit for programming. |
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| Keywords: | building structure steel girder bridge shakedown analysis loading incremental method |
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