Anti-slip Safety Design of Gravity Anchorage of Suspension Bridges with Over-2 000-meter Main Spans

被引：0
|
作者：
Xiong W. [1 ]
Wang R.-G. [2 ]
Wang T. [1 ]
Wei L.-Y. [2 ]
Zhou X.-Y. [1 ]
机构：
[1] School of Transportation, Southeast University, Jiangsu, Nanjing
[2] CCCC Highway Consultants Co. Ltd., Beijing
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2024年 / 37卷 / 04期
基金：
中国国家自然科学基金;
关键词：
anchorage; bridge engineering; design method; over-2 000 m-long suspension bridge; reliability; safety margin of anti-slip;
D O I：
10.19721/j.cnki.1001-7372.2024.04.013
中图分类号：
学科分类号：
摘要：
Design specifications for bridges are not applicable to over-2 000-m-long suspension bridges. The traditional design method with overall factors of safety reflects the safety margin of the bridge using average or standard values, and the failure probability calculated by resistance and load effects cannot be considered in the method. In this study, the statistical characteristics and variability of the load, resistance, and design parameters of the anchorage are discussed. Based on a reliability analysis, a limit state equation was established for the sliding of the gravity-type anchorage (GTA) of suspension bridges. Given the target reliability index, partial factors of resistance were discussed, and the expression of the equivalent factor of safety was deduced. Considering the world's longest suspension bridge spanning 2 300 m as an example, design equations with partial factors were established for the sliding resistance of the GTA of super-long-span suspension bridges, and a comparison was performed with the traditional design method with the overall factors of safety. The results show that the equivalent factors of safety considering the sliding of GTAs are significantly decreased by the limit state design method with partial factors. This design method is highly scientific and cost-effective. It also provides a theoretical basis and technical support for the design specifications of over-2 000-m-long suspension bridges. © 2024 Chang'an University. All rights reserved.
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页码：166 / 175
页数：9
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