Interlaminar connection design of continuous combined ballastless track on simply supported bridge
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摘要: 针对32m简支梁桥上连续结合式无碴轨道结构, 分别用换算截面法、有限元法及刚性简化计算法计算了列车活载、轨道板与底座板间温差及列车制动作用下的层间剪力, 得到了层间剪力分布图, 依据该图进行了层间连接件的设计。研究结果表明: 在列车荷载作用下, 层间剪力自梁端至跨中大致呈线性递减分布; 轨道板与底座板间存在10℃温差时, 层间剪力主要集中在桥梁两端5m范围内; 制动力作用下, 结合面上层间剪力沿跨长均匀分布, 均等于作用在轨道板之上的扣件纵向分布阻力; 当三者共同作用时, 轨道板与底座板之间的温差起控制作用, 因此, 桥梁端部受温差影响较大的5m范围内应加密销钉与连接钢筋设置。Abstract: The interlaminar shear force of continuous combined ballastless track on 32 m simply supported bridge was studied under train load, temperature difference between track slab and support slab and braking force with conversion section method, finite element method and rigid simplified method respectively, its distribution diagram was gotten, and the interlaminar connection design was proposed based on the diagram.The result shows that the shear force under train load linear decreases from the bridge end to the middle; the shear force is concentrated in the 5 m region next to the bridge end when there is a 10 ℃ temperature difference between track slab and support slab; the shear force under braking force evenly distributes along the bridge, which equals to the longitudinal resistance of fastener; when the three factors act together, the shear force is controlled by the temperature difference, so more dowels and connection rebars should be set in the 5 m region, which is heavily influenced by the temperature difference.
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图 4 温差作用下的层间剪力分布
Figure 4. Interlaminar shear force distribution under temperature difference
图 6 轨道板与底座板间的层间剪力分布
Figure 6. Interlaminar shear force distribution between track slab and support slab
图 7 底座板与桥梁间的层间剪力分布
Figure 7. Interlaminar shear force distribution between support slab and beam
表 1 各截面的层间剪力
Table 1. Interlaminar shear forces of different sections
断面 桥梁剪力/kN 轨道板与底座板结合面层间剪力/(kN·m-1) 底座板与桥梁结合面层间剪力/(kN·m-1) 梁端 3 148.5 133.2 271.9 1/8跨 2 501.7 105.9 216.0 1/4跨 1 925.0 81.5 166.2 3/8跨 1 294.7 54.8 111.8 跨中 981.9 41.6 84.8 
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[1] Leykauf G, Lechner B, Stahl W. Trends in the use of slab track/ballastless tracks[J]. Rail way Track Review, 2006, 46(Special): 10-17. [2] 赵国堂. 高速铁路无碴轨道技术[M]. 北京: 中国铁道出版社, 2005. [3] Esveld C. Recent development in slab track[J]. European Rail way Review, 2003, 9(2): 81-86. [4] 吴克俭, 辛学忠. 遂渝铁路无碴轨道工程技术创新研究与实践[J]. 中国铁路, 2007, 46(3): 9-15.Wu Ke-jian, Xin Xue-zhong. Innovative study and practice on the engineering technologies of ballastless track on Suining-Chongqing rail way[J]. Chinese Rail way, 2007, 46(3): 9-15. (in Chinese) [5] 吴冲. 现代钢桥(上册)[M]. 北京: 人民交通出版社, 2006. [6] 铁建设[2007]47号, 新建时速300-350公里客运专线铁路设计暂行规定(上/下)[S]. [7] 赵坪锐, 杨荣山, 刘学毅, 等. 客运专线无碴轨道理论研究报告[R]. 成都: 西南交通大学, 2007. [8] 铁道科学研究院. WJ-7扣件组装技术条件[M]. 北京: 中国铁道出版社, 2007. [9] 顾兴宇, 吴一鸣. 钢桥桥面铺装层间剪应力影响因素及简化计算[J]. 交通运输工程学报, 2007, 7(3): 70-75.Gu Xing-yu, Wu Yi-ming. Influence factors and simplified calculation of interbedded shear stress of asphalt paving on steel bridge[J]. Journal of Traffic and Transportation Engineering, 2007, 7(3): 70-75. (in Chinese) [10] GB50010—2002, 混凝土结构设计规范[S]. [11] 李庆华. 材料力学[M]. 成都: 西南交通大学出版社, 2005. [12] TB10002.3—2005, 铁路桥涵钢筋混凝土和预应力混凝土结构设计规范[S]. -
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