| 双孔预应力非对称无砟轨道板设计与分析 |
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| 引用本文： | 禹雷,张继文,赵国堂,涂永明.双孔预应力非对称无砟轨道板设计与分析[J].铁道科学与工程学报,2009,6(4). |
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| 作者姓名： | 禹雷 张继文 赵国堂 涂永明 |
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| 作者单位： | 1. 东南大学,混凝土及预应力混凝土结构教育部重点实验室,江苏,南京,210096
2. 京沪高速铁路股份有限公司,北京,100038 |
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| 基金项目： | 铁道部重点科研项目(2008G031-F) |
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| 摘 要： | 针对我国高速铁路桥上采用的板式无砟轨道普遍存在线间排水困难和板底易出现横向裂缝问题,提出一种新型双孔型板式无砟轨道,采用有限元软件ANSYS建立三维空间模型,分析在2种不同工况下新型轨道板的应力、变形和承载力性能,并在组合外力矩作用下进行预应力非对称配筋设计.研究结果表明,新型双孔型板式无砟轨道可以有效解决线间排水困难问题,与普通无砟板式轨道相比,新型轨道板具有更好的稳定性;在竖向荷载作用下,双孔型轨道板的最大应力、位移和裂缝宽度均满足设计要求;在配筋总量相对较少的情况下,轨道板的非对称预应力筋设计可以有效减小板底裂缝最大宽度,板底抗裂程度相对于普通轨道板增大33.3%,增强了轨道板的耐久性,且经济性能良好.
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| 关 键 词： | 高速铁路 双孔型轨道板 普通板式轨道 方孔挡台 有限元 |
Design and analysis of new double-hole asymmetric prestressed reinforcement slab |
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| YU Lei
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ZHANG Ji-wen
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ZHAO Guo-tang
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TU Yong-ming.Design and analysis of new double-hole asymmetric prestressed reinforcement slab[J].Journal of Railway Science and Engineering,2009,6(4). |
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| Authors: | YU Lei ZHANG Ji-wen ZHAO Guo-tang TU Yong-ming |
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| Institution: | YU Lei1,ZHANG Ji-wen1,ZHAO Guo-tang2,TU Yong-ming1 (1.Key Laboratory of RC & PC Structure of Ministry of Education,Southeast University,Nanjing 210096,China,2.Headquarters of Beijing-Shanghai High-speed Railway,Beijing 100038,China) |
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| Abstract: | In order to solve the three-side drainage and crack of slab bottom problems of common slab ballastless track in high-speed railway bridge,the new double-hole slab was desigened that differs from common slab track,and double-hole slab 3D models were built by using ANSYS software,the strain,deformation and bearing capacity of the new slab track were analyzed under two load case,and asymmetric prestressed reinforcement was designed under combined moment.The results show that the double-hole slabs can effective... |
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| Keywords: | high speed railway double-hole slab track common slab ballastless track rectangular stopper finite element |
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