Computation model of rupture force between continuously welded rail and high-speed railway bridge
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摘要: 在吸收前人研究成果的基础上, 采用实体单元模拟桥梁及桥梁墩台, 采用空间梁单元模拟钢轨及轨枕, 采用弹簧单元模拟钢轨、轨枕、桥梁与墩台之间的连接, 建立了断轨三维有限元空间力学模型。以秦沈客运专线10跨32 m简支双线整孔箱形梁桥为例, 对其进行断缝值影响因素分析。研究结果表明: 对于多跨简支梁桥, 断缝与梁温度变化幅度、断缝位置、支座摩擦阻力关系不大; 断缝值与扣件纵向阻力、钢轨温度变化幅度、桥墩纵向刚度、钢轨类型关系比较密切; 断缝值及采用的力学计算模型也有一定的关系, 相比传统计算模型, 空间力学模型计算结果偏小。Abstract: Based on the study achievements of some predecessors, bridge, pier and abutment were simulated by solid element, rail and sleeper were simulated by space beam element, the links of rail, sleeper, bridge, pier and abutment were simulated by spring element, a three-dimensional finite element spatial mechanics model for calculating the rupture force between continuously welded rail and high-speed railway bridge was established.Taking a 10-span-32 m simply supported double-track box girder beam bridge in Qin-Shen passenger special line as an example, the influence factors of rail gap were analyzed.The result shows that bridge temperature variation amplitude, bearing frictional force and rail gap position have little influence on rail gap, fastener longitudinal resistance, rail temperature variation amplitude, rail type and pier longitudinal stiffness have remarkable influence on rail gap, mechanics models also have some influence on rail gap, the computation result of new three-dimensional spatial model is lesser compared with traditional plane model.
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图 3 断缝值与钢轨温度变化幅度关系
Figure 3. Relation of rail gap and rail temperature variation amplitude
图 4 断缝值与梁温度变化幅度关系
Figure 4. Relation of rail gap and bridge temperature variation amplitude
图 7 断缝值与支座摩擦阻力系数关系
Figure 7. Relation of rail gap and bearing frictional force coefficient
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[1] Karsten G, Wolfgang G, Richard S. Zur messwertgestutzten ermittung der verteilung der brems—und anfahrkrafte an der eisenbahnhochbrucke rendsburg[J]. Stahlbau, 2002, 71 (10): 735-747. doi: 10.1002/stab.200202480 [2] Carla E, Martin K. angskraftabtragung bei eisenbahnbrucken unter temperatureinwirkung[J]. Eisenbahningenieur, 2001, 52 (2): 36-40. [3] Ladislav F. Thermalinteraction of long welded rails with raiway bridges[J]. Rail International, 1985, 16 (3): 5-24. [4] Czyczula W, Solkowski J, Towpik K. Interaction between CWR track and bridges inlongitudinal direction[J]. Archives of Civil Engineering, 1997, 43 (1): 51-69. [5] 徐庆元, 陈秀方. 小阻力扣件桥上无缝线路附加力[J]. 交通运输工程学报, 2003, 3 (1): 25-30. http://transport.chd.edu.cn/article/id/200301006Xu Qing-yuan, Chen Xiu-fang. Additional longitudinal forces transmission between bridges and continuously welded rails with small resistance fasteners[J]. Journal of Traffic and Transportation Engineering, 2003, 3 (1): 25-30. (in Chinese) http://transport.chd.edu.cn/article/id/200301006 [6] 徐庆元, 陈秀方. 连续梁桥上无缝线路附加力研究[J]. 中国铁道科学, 2003, 24 (3): 58-62. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200303013.htmXu Qing-yuan, Chen Xiu-fang. Study on additional force transmission between continuously welded rails and continuous beam bridge[J]. China Railway Science, 2003, 24 (3): 58-63. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGTK200303013.htm [7] 李宏年, 朱唏, 于新杰. PC简支梁铁路桥制动力有效系数的研究[J]. 土木工程学报, 2000, 33 (3): 22-30. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200003003.htmLi Hong-nian, Zhu Xi, Yu Xin-jie. Research on effective coefficient of braking force of simply supported PC-beam railway bridges[J]. China Civil Engineering Journal, 2000, 33 (3): 22-30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200003003.htm [8] 王锐锋, 李宏年. 铁路桥梁列车制动力荷载研究[J]. 北方交通大学学报, 2003, 27 (1): 63-67. https://www.cnki.com.cn/Article/CJFDTOTAL-BFJT200301015.htmWang Rui-feng, Li Hong-nian. Study of train braking force on railroad bridge[J]. Journal of Northern Jiaotong University, 2003, 27 (1): 63-67. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BFJT200301015.htm [9] 蔡成标. 高速铁路特大跨度桥上无缝线路纵向附加力计算[J]. 西南交通大学学报, 2003, 38 (5): 609-614. https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT200305030.htmCai Cheng-biao. Calculation of additional longitudinal forces in continuously welded rails on super-large bridges of high-speed railways[J]. Journal of Southwest University, 2003, 38 (5): 609-614. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XNJT200305030.htm -
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