Discussion on the Design of Cable Tower Grouping-anchorage-system of Cable-stayed Bridge
左新黛1, 李茜1, 文坡2
1. Institute of Highway Science, Ministry of Transport, Beijing, 100088;
2. China Railway Bridge Survey and Design Institute Group Co. LTD, Wuhan Huben, 430056
Discussion on the Design of Cable Tower Grouping-anchorage-system of Cable-stayed Bridge
ZUO Xin-dai1, LI Qian1, WEN Po2
1. Institute of Highway Science, Ministry of Transport, Beijing, 100088;
2. China Railway Bridge Survey and Design Institute Group Co. LTD, Wuhan Huben, 430056
摘要Cable Tower Grouping-Anchorage-System of Cable-Stayed Bridges is a new type of anchorage system, which is only used in Chi-Zhou bridge in An Hui province in domestic. In order to understand the behavior characteristics and the design methods, took Chi-Zhou Bridge as an example. Firstly, the propaedeutics were introduced, and then the finite element models of the whole bridge were built in six different cases and parameters sensitivity were analyzed which included cables layouts, agglomeration forms and steel beams design. Then took introduced the beam-column stiffness ratio, studied the stiffness matching between concrete tower and steel beam and clarified the influence of grouping, agglomeration and stiffness ratio on the whole bridge. Some design suggestions were stated. The results showed that the Grouping-Anchorage-System is more advantageous on the lateral stability and torsion resistance of the whole bridge; The steel beams are the key point of design because of the stress complexity. Changing the length of the steel beam will bring about changes in the local stress and changing the space between steel beams will bring about changes in the whole bridge. Considering the layout spaces and detailing requirements, the length of steel beams should be reduced as much as possible, so as to improve the efficiency of stay cables, which is beneficial to the whole bridge stress and economy.
Abstract：Cable Tower Grouping-Anchorage-System of Cable-Stayed Bridges is a new type of anchorage system, which is only used in Chi-Zhou bridge in An Hui province in domestic. In order to understand the behavior characteristics and the design methods, took Chi-Zhou Bridge as an example. Firstly, the propaedeutics were introduced, and then the finite element models of the whole bridge were built in six different cases and parameters sensitivity were analyzed which included cables layouts, agglomeration forms and steel beams design. Then took introduced the beam-column stiffness ratio, studied the stiffness matching between concrete tower and steel beam and clarified the influence of grouping, agglomeration and stiffness ratio on the whole bridge. Some design suggestions were stated. The results showed that the Grouping-Anchorage-System is more advantageous on the lateral stability and torsion resistance of the whole bridge; The steel beams are the key point of design because of the stress complexity. Changing the length of the steel beam will bring about changes in the local stress and changing the space between steel beams will bring about changes in the whole bridge. Considering the layout spaces and detailing requirements, the length of steel beams should be reduced as much as possible, so as to improve the efficiency of stay cables, which is beneficial to the whole bridge stress and economy.
基金资助:Supported by the the Science and Technology Innovation Foundation of Research Institute of Ministry of Transport(No.2019-l 113)
通讯作者:
ZUO Xin-dai
E-mail: 330217252@qq.com
引用本文:
左新黛, 李茜, 文坡. Discussion on the Design of Cable Tower Grouping-anchorage-system of Cable-stayed Bridge[J]. Journal of Highway and Transportation Research and Development, 2021, 15(2): 30-39.
ZUO Xin-dai, LI Qian, WEN Po. Discussion on the Design of Cable Tower Grouping-anchorage-system of Cable-stayed Bridge. Journal of Highway and Transportation Research and Development, 2021, 15(2): 30-39.
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2021, Vol. 15 
