| 混凝土单箱多室宽箱梁剪力滞系数分析 |
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| 引用本文： | 董宇路,汪罗英.混凝土单箱多室宽箱梁剪力滞系数分析[J].城市道桥与防洪,2009(12):124-127. |
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| 作者姓名： | 董宇路 汪罗英 |
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| 作者单位： | 1. 上海市城市建设投资开发总公司内河航道整治工程建设指挥部,上海市,200092
2. 上海市政工程设计研究总院,上海市,200092 |
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| 摘 要： | 该明确了宽跨比、宽高比均较大的低高度混凝土单箱多室连续梁桥在活载作用下的剪力滞效应分布特点,通过空间实体模型与平面杆系模型相结合的有限元法,对此类桥的空间应力响应进行了研究。研究表明:边跨和中跨跨中断面的剪力滞效应均较小,而中支点断面的剪力滞效应十分显著。研究给出此类桥型不同区段合理剪力滞系数的取值,成果可为今后类似工程的设计、施工及长期监测研究提供参考。
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| 关 键 词： | 预应力混凝土 宽箱梁 单箱多室 剪力滞 低高度 应力重分布 |
Analysis of Shear Lag Coefficient in Concrete Single-box Multi-cell Wide-box Girder |
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| Dong Yulu,Wang Luoying.Analysis of Shear Lag Coefficient in Concrete Single-box Multi-cell Wide-box Girder[J].Urban Roads Bridges & Flood Control,2009(12):124-127. |
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| Authors: | Dong Yulu Wang Luoying |
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| Abstract: | The distribution characteristics of shear lag effect in the low height concrete single-box multi-cell continuous girder bridge with the wide span ratio and wide height ratio are made clear under the live load effect.The article studies the space stress response of this kind of bridge by space solid model and plane bar model.The results shows that shear lag effects of the sections in the side span and middle span are all smaller,and that shear lag effect in middle supporting section is very evident.The reasonable shear log coefficients are proposed for this kind of bridge in the different zones.The conclusions obtained can be referred for the design,construction and long-term monitoring study of the similar projects in the future. |
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| Keywords: | prestressed concrete wide box girder single-box multi-cell shear lag low height stress redistribution |
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