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Abstract

To accurately predict the closure length of the main beam of a large-span cable-stayed bridge under the action of temperature, this paper employed an elastic foundation beam model to propose a differential equilibrium equation for the axial deformation of the main beam. By combining structural temperature deformation and support boundary conditions, a prediction method for obtaining the closure length of the main beam was solved to reveal the variation law of the closure under the action of temperature. Meanwhile, the proposed method was validated by finite element numerical analysis results and continuous observation data of the Yanpingba Yangtze River Bridge. The results show that the closure length of the main beam varies linearly with the action of temperature, and compared to the temperature difference between the cable and the main beam, the overall closure length produced by the action of overall temperature difference of the main beam varies greatly. Additionally, the change is less affected by the rigidity of the cable support, but it will increase with the rising cross-sectional area of the main beam.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.028

First Page

177

Last Page

181

Submission Date

March 2025

Reference

[1] 刘生奇, 蒋本俊. 武汉二七长江大桥跨中钢梁合龙施工技术[J]. 桥梁建设, 2012, 42(4): 7-13. LIU Shengqi, JIANG Benjun. Construction techniques for closure of midspan steel girder of Wuhan Erqi Changjiang River bridge[J]. Bridge Construction, 2012, 42(4): 7-13. [2] 田卫东，柳俊峰.合肥南淝河大桥主桥合龙施工技术[J].桥梁建设，2012，42(S1)：126‑130. TIAN Weidong, LIU Junfeng. Construction technology of main span closure of Hefei Nanfei River Bridge [J]. Bridge Construction, 2012, 42(S1): 126-130. [3] 涂光亚, 颜东煌, 陈常松, 等. 荆岳长江公路大桥中跨合龙施工技术[J]. 桥梁建设, 2013, 43(4): 105-109. TU Guangya, YAN Donghuang, CHEN Changsong, et al. Construction techniques for closure of central span of jingyue Changjiang River highway bridge[J]. Bridge Construction, 2013, 43(4): 105-109. [4] 高宗余. 青洲闽江大桥结合梁斜拉桥设计[J]. 桥梁建设, 2001, 31(4): 13-17. GAO Zongyu. Design of composite girder cable-stayed bridge over Minjiang River at Qingzhou[J]. Bridge Construction, 2001, 31(4): 13-17. [5] 贾少敏, 赵雷, 杨兴旺. 嘉绍大桥主航道桥几何合龙控制[J]. 公路交通科技, 2014, 31(4): 87-93. JIA Shaomin, ZHAO Lei, YANG Xingwang. Geometry closure control of main channel bridge of Jiaxing-Shaoxing bridge[J]. Journal of Highway and Transportation Research and Development, 2014, 31(4): 87-93. [6] 涂光亚, 李辉, 李亮辉. 超大跨度混合梁斜拉桥中跨合龙温度影响及对策[J]. 中外公路, 2020, 40(1): 61-64. TU Guangya, LI Hui, LI Lianghui. Temperature influence and countermeasure of mid-span closure of super long-span hybrid girder cable-stayed bridge[J]. Journal of China & Foreign Highway, 2020, 40(1): 61-64. [7] 韩大章，李正，华新.江苏灌河大桥设计[J].预应力技术，2007(4)：3‑7. HAN Dazhang, LI Zhen, HUA Xin. Design of Jiangsu Guanhe Bridge [J]. Prestress Technology, 2007(4): 3-7. [8] 刘俊胜, 王宏, 王智龙, 等. 大跨径结合梁斜拉桥的主跨合龙技术[J]. 公路交通技术, 2010, 26(4): 67-70. LIU Junsheng, WANG Hong, WANG Zhilong, et al. Main span closure technology in large-span combination beam cable-stayed bridge[J]. Technology of Highway and Transport, 2010, 26(4): 67-70. [9] 易云焜, 谢泽福, 牛海喜. 厦漳跨海大桥南汊主桥定时合龙技术[J]. 桥梁建设, 2013, 43(2): 105-109. YI Yunkun, XIE Zefu, NIU Haixi. Technique of fixed time closure for main bridge of south bridge of Xiazhang Sea-crossing bridge[J]. Bridge Construction, 2013, 43(2): 105-109. [10] 李国豪. 桥梁结构稳定与振动[M]. 北京: 中国铁道出版社, 1992. LI Guohao. Stability and vibration of bridge structure[M]. Beijing: China Railway Publishing House, 1992. [11] 柳惠芬.斜拉桥的实用简化分析[D].上海：同济大学，1995. LIU Huifen. Practical simplified analysis of cable-stayed bridges [D]. Shanghai: Tongji University, 1995. [12] 张哲, 万其柏. 应用弹性地基梁法计算斜拉桥无索区长度[J]. 大连海事大学学报, 2010, 36(2): 95-99. ZHANG Zhe, WAN (Qi)(BaiBo). Calculation of non-cable-stayed length by equivalent beam on elastic foundation method[J]. Journal of Dalian Maritime University, 2010, 36(2): 95-99.

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