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摘要: 运用梁轨相互作用原理, 建立了斜拉桥上无缝线路纵向力计算模型, 编制了计算软件, 以一座铁路常用双塔钢桁斜拉桥为例, 研究了斜拉桥上无缝线路纵向力规律。分析结果表明: 可将斜拉桥简化为跨中设置固定支座的连续梁进行钢轨伸缩力计算; 计算钢轨挠曲力时, 可在斜拉桥主跨及其邻跨上布置荷载, 或仅在斜拉桥主跨上布置荷载, 而且不必考虑列车入桥方向的变化; 铁路斜拉桥需设置速度锁定器以有效限制列车制动作用下的主梁纵向位移, 减小线路受力变形; 斜拉桥上铺设无缝线路应采用梁轨相互作用法以精确计算钢轨断缝值。Abstract: Based on the theory of track-bridge interaction, the calculation model of longitudinal force for continuous welded rail (CWR) on cable-stayed bridge was established, and the related calculation software was compiled.Taking a double-tower steel truss cable-stayed bridge commonly used in the railway as an example, the longitudinal force regulations of CWR were analyzed.Analysis result shows that the cable-stayed bridge can be simplified as a continuous beam with fixed bearing in the middle to calculate rail expansion forces.Rail bending forces can be calculated under the conditions of loads laid on main span and its adjacent span or the separate main span, and the direction change of train needn't be considered.Speed locking devices should be set on railway cable-stayed bridge to effectively limit the main beam longitudinal displacement under train braking force, and rail deformation decreases simultaneously.The method of trackbridge interaction should be used for cable-stayed bridge with CWR to calculate rail broken gap value accurately.
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图 1 斜拉桥梁轨相互作用计算模型
Figure 1. Calculation model of track-bridge interaction for cable-stayed bridge
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[1] 徐庆元. 高速铁路桥上无缝线路纵向附加力三维有限元静力与动力分析研究[D]. 长沙: 中南大学, 2005.XU Qing-yuan. Static and dynamic 3Dfinite element analysis of additional longitudinal forces transmission between CWR and high-speed railway bridges[D]. Changsha: Central South University, 2005. (in Chinese). [2] 徐庆元, 陈秀方, 李树德. 高速铁路桥上无缝线路纵向附加力研究[J]. 中国铁道科学, 2006, 27 (3): 8-12. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200603001.htmXU Qing-yuan, CHEN Xiu-fang, LI Shu-de. Study on the additional longitudinal forces transmission between continuously welded rails and high-speed railway bridges[J]. China Railway Science, 2006, 27 (3): 8-12. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200603001.htm [3] 张建. 刚构桥上无缝线路的ANSYS分析及二次开发[D]. 长沙: 中南大学, 2007.ZHANG Jian. ANSYS analysis and secondary exploitation of CWR on rigid frame bridge[D]. Changsha: Central South University, 2007. (in Chinese). [4] 李秋义, 孙立. 桥墩温差荷载引起的桥上无缝线路钢轨附加力[J]. 中国铁道科学, 2007, 28 (4): 50-54. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200704012.htmLI Qiu-yi, SUN Li. Additional longitudinal force of CWR track on bridge caused by temperature difference between one side and another side of pier[J]. China Railway Science, 2007, 28 (4): 50-54. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200704012.htm [5] 魏贤奎, 陈小平, 王平. 有砟轨道基础桥上无缝线路计算软件开发及应用[J]. 铁道建筑, 2010 (8): 115-118. https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201008037.htmWEI Xian-kui, CHEN Xiao-ping, WANG Ping. Development and application of calculation software of CWR with ballasted track on bridges[J]. Railway Engineering, 2010 (8): 115-118. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201008037.htm [6] RUGE P, BIRK C. Longitudinal forces in continuously welded rails on bridge decks due to nonlinear track-bridge interaction[J]. Computers and Structures, 2007, 85 (7/8): 458-475. [7] RUGE P, WIDARDA D R, SCHMALZLIN G, et al. Longitudinal track-bridge interaction due to sudden change of coupling interface[J]. Computers and Structures, 2009, 87 (1/2): 47-58. [8] 李志辉. 铁路高墩、大跨、长联简支梁桥上无缝线路桥墩纵向水平线刚度优化[D]. 长沙: 中南大学, 2011.LI Zhi-hui. The optimization of pier longitudinal linear stiffness of CWR on railway simply supported bridges with highpier, long span and large-length[D]. Changsha: Central South University, 2011. (in Chinese). [9] BATTINI J M, MAHIR U K. A simple finite element to consider the non-linear influence of the ballast on vibrations of railway bridges[J]. Engineering Structures, 2011, 33 (9) 2597-2602. doi: 10.1016/j.engstruct.2011.05.005 [10] 朱彬. 大跨度钢箱混合梁斜拉桥无缝线路设计研究[J]. 铁道标准设计, 2012 (2): 4-6, 15. https://www.cnki.com.cn/Article/CJFDTOTAL-TDBS201202004.htmZHU Bin. Design of continuous welded rail upon long span cablestayed bridge with steel-concrete composite box beam[J]. Railway Standard Design, 2012 (2): 4-6, 15. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-TDBS201202004.htm [11] 闫斌, 戴公连. 高速铁路斜拉桥上无缝线路纵向力研究[J]. 铁道学报, 2012, 34 (3): 83-87. https://www.cnki.com.cn/Article/CJFDTOTAL-TDXB201203019.htmYAN Bin, DAI Gong-lian. CWR longitudinal force of cablestayed bridge of high-speed railway[J]. Journal of the China Railway Society, 2012, 34 (3): 83-87. (in Chinese). https://www.cnki.com.cn/Article/CJFDTOTAL-TDXB201203019.htm [12] 闫斌, 戴公连, 董林育. 客运专线斜拉桥梁轨相互作用设计参数[J]. 交通运输工程学报, 2012, 12 (1): 31-37. http://transport.chd.edu.cn/article/id/201201006YAN Bin, DAI Gong-lian, DONG Lin-yu. Design parameters of track-bridge interaction on passenger dedicated line cablestayed bridge[J]. Journal of Traffic and Transportation Engineering, 2012, 12 (1): 31-37. (in Chinese). http://transport.chd.edu.cn/article/id/201201006 [13] 赵卫华. 斜拉桥上无缝线路设计计算方法研究[D]. 成都: 西南交通大学, 2010.ZHAO Wei-hua. A study of calculation method of CWR on cable-stayed bridge[D]. Chengdu: Southwest Jiaotong University, 2010. (in Chinese). -
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