| 三塔单索面PC斜拉桥的地震反应研究 |
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| 引用本文： | 李晓莉,喻宝金.三塔单索面PC斜拉桥的地震反应研究[J].公路交通科技,2006,23(2):83-85. |
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| 作者姓名： | 李晓莉 喻宝金 |
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| 作者单位： | 1. 同济大学,桥梁工程系,上海,200092
2. 江西省公路管理局,江西,南昌,330002 |
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| 摘 要： | 考虑几何非线性因素的影响,利用大型结构分析程序ANSYS,以一座拟建的三塔单索面预应力混凝土斜拉桥为背景,进行动态时程分析。此类桥与单、两塔PC斜拉桥的地震反应存在一定的差异,本文分析了此类桥在纵向输入地震波作用下的地震动反应,并同谱分析的反应结果做比较,总结了此类桥的地震反应规律。最后参照活载作用下的内力、位移结果,证明该桥的抗震能力有保证。本文得出的结论对此类多塔斜拉桥的抗震设计有重要的参考价值。
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| 关 键 词： | 三塔斜拉桥 非线性 动力时程 地震波 |
| 文章编号： | 1002-0268(2006)02-0083-03 |
| 收稿时间： | 2004-11-12 |
| 修稿时间： | 2004年11月12 |
Analysis of Seismic Response for PC Cable - stayed Bridge with Three Towers and Single Cable Plane |
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| LI Xiao-li,YU Bao-jin.Analysis of Seismic Response for PC Cable - stayed Bridge with Three Towers and Single Cable Plane[J].Journal of Highway and Transportation Research and Development,2006,23(2):83-85. |
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| Authors: | LI Xiao-li YU Bao-jin |
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| Institution: | 1.Department of Bridge Engineering, Tongii University, Shanghai 200092, China; 2.Jiangxi Highway Administration Bureau, Jiangxi Nanchang 330002, China |
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| Abstract: | A PC cable-stayed bridge with three towers and single cable plane is calculated with ANSYS and dynamic time history analysis considering the nonlinear factors.There is a difference between this bridge and general cable-stayed bridge with single or two towers in terms of earthquake responses.Under the longitudinal seismic wave the earthquake responses of this bridge are calculated and compared with results of the spectral analysis,so that the patterns of the seismic respouse are summarized.It is concluded that it is not the seismic load controls the design,since it has less effect on the internal force and displacement than the live load.The findings are very useful for the seismic design of such kind cable-stayed bridge with more towers. |
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| Keywords: | Wable-stayed bridge with three towers Nonlinearity Dynamic time history Seismic wave |
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