| 谢朋林,胡成.大跨度斜拉桥双边箱梁剪力滞效应研究[J].安徽建筑大学学报,2016,24(4):26-30 |
| 大跨度斜拉桥双边箱梁剪力滞效应研究 |
| Shear lag effect analysis of bilateral box girder of long-span cable-stayed bridge |
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| DOI：10.11921/j.issn.2095-8382.20160406 |
| 中文关键词: 斜拉桥 双边箱梁；最大悬臂；剪力滞；正应力 |
| 英文关键词: cable-stayed bridge bilateral box girder maximum cantilever shear lag normal stress |
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| 中文摘要: |
| 为明确宽幅薄壁双边箱梁斜拉桥在最大悬臂施工阶段主要荷载对剪力滞效应的影响，以某斜拉桥为研究对象，采用有限元方法计算分析了混凝土双边箱梁截面在不同荷载单独作用及组合作用下的剪力滞效应。分析表明，自重作用下，距离塔根越近，箱梁剪力滞效应越明显；斜拉索索力对主梁剪力滞效应影响规律与自重类似；纵向预应力作用下，全桥剪力滞效应不明显；通过调整纵向预应力及斜拉索索力参数，可以优化双边箱梁的剪力滞效应。 |
| 英文摘要: |
| In order to determine the effect of main loadings on the construction stage of the maximum cantilever on shear lag effect in bilateral box girder of concrete cable-stayed bridge with wide and thin wall, the shear lag effect of concrete bilateral box girder of a cable-stayed bridge under different loads of both independent action and composite actions with the finite element method was calculated and analyzed. The analysis showed that the shear lag effect of box girder was more obvious when it was closer to the tower under dead weight; In addition, the effect of the law of cable force on the shear lag effect of the main girder is similar to the weight of the girder; The shear lag effect of the whole bridge is not obvious under longitudinal pre-stress; the shear lag effect of bilateral box girder can be optimized by adjusting the longitudinal pre-stress and the cable force parameters. |
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