| 反复荷载作用下部分PC梁桥时频挠度计算分析 |
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| 引用本文： | 李世安,贺拴海,赵煜. 反复荷载作用下部分PC梁桥时频挠度计算分析[J]. 武汉理工大学学报, 2011, 0(9): 55-60,96 |
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| 作者姓名： | 李世安 贺拴海 赵煜 |
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| 作者单位： | 长安大学公路学院; |
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| 基金项目： | 西部交通建设科技项目(2011318812970); 中央高校基本科研业务费专项资金(CHD2011ZY003) |
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| 摘 要： | 针对反复荷载作用下部分PC梁桥的长期下挠状况,基于预测交通量和疲劳荷载谱,结合混凝土结构疲劳试验,得出了考虑反复荷载作用下部分PC梁桥长期挠度的计算模式,并对实桥长期挠度进行了计算。结果表明,桥梁运营通车后,反复荷载作用影响下的挠度主要发生在最初的两年,在此期间作用次数已达到200万次。初始荷载产生弯矩M
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| 关 键 词： | 部分预应力 反复荷载 长期挠度 荷载谱 |
Time-frequency Deflection Calculations Research of Partially PC Grider Bridge with the Effect of Cyclic Loading |
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| LI Shi-an,HE Shuan-hai,ZHAO Yu. Time-frequency Deflection Calculations Research of Partially PC Grider Bridge with the Effect of Cyclic Loading[J]. Journal of Wuhan University of Technology, 2011, 0(9): 55-60,96 |
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| Authors: | LI Shi-an HE Shuan-hai ZHAO Yu |
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| Affiliation: | LI Shi-an,HE Shuan-hai,ZHAO Yu (School of Highway,Chang'an University,Xi'an 710064,China) |
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| Abstract: | This paper is focused on the long-term deflection of partially prestressed concrete bridge with the effect of cyclic loading.Study on fatigue load spectrum and forecast traffic volume,the calculation mode that is combined with concrete structure fatigue test of partially prestressed concrete considering cyclic loading is given.The real bridge's long-time deflection is also calculated in this paper.The results show that deflection under the action of cyclic loads mainly happens in the first two years after t... |
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| Keywords: | partially prestressed cyclic loading long-term deflection load spectrum |
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