| 九江长江公路大桥宽幅主梁结合段剪力滞效应分析 |
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| 引用本文： | 徐重财,郑舟军.九江长江公路大桥宽幅主梁结合段剪力滞效应分析[J].桥梁建设,2010(3). |
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| 作者姓名： | 徐重财 郑舟军 |
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| 作者单位： | 1. 江西省高速公路投资集团有限责任公司,江西,南昌,330025
2. 中铁大桥局集团桥科院有限公司,湖北,武汉,430034 |
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| 摘 要： | 九江长江公路大桥主桥为双塔双索面混合梁斜拉桥。该桥主梁宽高比大,钢-混结合段构造和受力复杂,剪力滞效应显著。为研究钢-混结合段剪力滞效应分布对主梁受力及结构布置的影响,选取含结合段的主梁节段建立模型,采用有限元法分析结合段钢梁及混凝土梁关键截面顶、底板在设计控制工况内力作用下的应力和剪力滞系数分布。分析结果表明:结合段混凝土梁存在较强的剪力滞效应,底板靠斜底板处剪力滞系数最大,达到1.5,在未考虑纵向预应力作用的情况下,混凝土梁底板存在较强的顺桥向拉应力,建议根据剪力滞系数分布加强纵向预应力布置。
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| 关 键 词： | 斜拉桥 混合梁 剪力滞 有限元法 应力分析 |
Analysis of Shear Lag Effect of Joint Section of Wide Main Girder of Jiujiang Changjiang River Highway Bridge |
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| XU Zhong-cai,ZHENG Zhou-jun.Analysis of Shear Lag Effect of Joint Section of Wide Main Girder of Jiujiang Changjiang River Highway Bridge[J].Bridge Construction,2010(3). |
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| Authors: | XU Zhong-cai ZHENG Zhou-jun |
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| Institution: | XU Zhong-cai1,ZHENG Zhou-jun2(1.Jiangxi Expressway Investment Group Co.,Ltd.,Nanchang 330025,China,2.Bridge ScienceResearch Institute Ltd.,China Railway Major Bridge Engineering Group,Wuhan 430034,China) |
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| Abstract: | The main bridge of Jiujiang Changjiang River Highway Bridge is a hybrid girder cable-stayed bridge with double pylons and double cable planes.The width-to-depth ratio of the main girder of the bridge is great,the structure and force conditions of the steel and concrete girder joint section are complicated and the shear lag effect there is obvious.To study the influence of the shear lag effect distribution of the joint section on the force conditions and structural layout of the main girder,a section of the ... |
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| Keywords: | cable-stayed bridge hybrid girder shear lag finite element method stress analysis |
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