| 塔梁间纵向弹性约束对铁路斜拉桥动力特性及地震反应的影响 |
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| 引用本文： | 张永亮,陈兴冲,郭永强.塔梁间纵向弹性约束对铁路斜拉桥动力特性及地震反应的影响[J].铁道科学与工程学报,2011(2):21-26. |
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| 作者姓名： | 张永亮 陈兴冲 郭永强 |
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| 作者单位： | 兰州交通大学土木工程学院;兰州大学土木学院与力学学院; |
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| 基金项目： | 国家自然科学基金资助项目(10902045); 铁道部科技研究开发计划项目(2008G031-k) |
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| 摘 要： | 以某铁路斜拉桥为工程背景,研究了塔、梁间纵向弹性约束刚度取值对斜拉桥动力特性及主塔地震反应的影响.研究结果表明:纵向弹性约束对斜拉桥体系纵漂及主梁反对称竖弯振型影响较大.与漂浮体系相比,在弹性约束刚度的合理取值条件下,弹性约束使塔顶位移及塔身控制截面的弯矩有较大幅度的降低,但使部分塔身控制截面的剪力增大.
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| 关 键 词： | 斜拉桥 纵向弹性约束 动力特性 地震反应 |
Influnce of longitudinal elastic constraints on dynamic charateristic and seismic response of railway cable-stayed bridge |
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| ZHANG Yong-liang,CHEN Xing-chong,GUO Yong-qiang.Influnce of longitudinal elastic constraints on dynamic charateristic and seismic response of railway cable-stayed bridge[J].Journal of Railway Science and Engineering,2011(2):21-26. |
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| Authors: | ZHANG Yong-liang CHEN Xing-chong GUO Yong-qiang |
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| Institution: | ZHANG Yong-liang1,CHEN Xing-chong1,GUO Yong-qiang2(1.School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China,2.School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China) |
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| Abstract: | Taking a railway cable-stayed bridge as project background,the influnce of longitudinal elastic constraint installed between main tower and main girder on structural dynamic charateristic and seismic response of main tower was studied.The results show that the influnce of longitudinal elastic constraint on mode shapes of structural longitudinal floating and anti-symmetric vertical bending of main girder is significant.Compared with entirely floating system,elastic constraint results of displacement in the s... |
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| Keywords: | cable-stayed bridge longitudinal elastic constraint dynamic charateristic seismic response |
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