无砟轨道层间裂纹内动水压力特性分析

曹世豪; 杨荣山; 刘学毅; 苏成光; 郭利康

doi:10.3969/j.issn.0258-2724.2016.01.006

无砟轨道层间裂纹内动水压力特性分析

doi: 10.3969/j.issn.0258-2724.2016.01.006

基金项目:

国家自然科学基金资助项目(51278431)

国家自然科学基金重点项目(U1434208)

详细信息

作者简介:
曹世豪(1988-),男,博士研究生,研究方向为轨道结构与轨道动力学,E-mail:531148108@qq.com

通讯作者:
杨荣山(1975-),男,副教授,博士,研究方向为轨道结构与轨道动力学,E-mail:yrs@home.swjtu.edu.cn

计量
- 文章访问数: 1225
- HTML全文浏览量: 182
- PDF下载量: 363
- 被引次数: 0
出版历程
- 收稿日期: 2015-06-02
- 刊出日期: 2016-01-25

Analysis of Water Pressure in Ballastless Track Crack

摘要

摘要: 在雨水丰富和排水不畅的地区,水对无砟轨道层间裂纹扩展的影响比较突出.为研究高速列车作用下无砟轨道裂纹内水压力的分布规律及压力大小的影响因素,基于质量守恒和动量定理,采用控制体积法,导出了裂纹内动水压力分布解析式.应用有限元分析软件ANSYS和CFX,分析了荷载频率、荷载幅值、裂纹深度、裂纹开口量等对动水压力的影响.分析结果表明:沿着裂纹出口的方向,水压力呈减小趋势,其最大值发生在裂纹尖端处;动水压力与荷载频率近似呈二次方关系,与荷载幅值呈线性关系,与裂纹开口量呈一次反比关系.在幅值为10 kN、频率为5 Hz荷载作用下,水压力分布的试验测试结果与理论分析基本一致,两种方法获得的水压力峰值分别为0.177、0.161 kPa.
- 无砟轨道 /
- 裂纹 /
- 列车 /
- 荷载 /
- 水压力
Abstract: In the areas with sufficient rainfall and poor drainage, water in ballastless track has significant effect on the crack propagation. To analyze the distribution of water pressure and influential factors on water pressure in the ballastless track under high-frequency train load, based on the law of mass conservation and momentum theorem, the analytical expression of water pressure was deduced by using the control volume method. The finite element software ANSYS and CFX were used to analyze the influence of loading frequency, load amplitude, crack length and crack opening on water pressure. The theoretical results show that the maximum water pressure appears at the crack tip under loading, and decreases along the crack. The value of water pressure is proportional to load amplitude, square of loading frequency and inversely proportional to crack opening. At the frequency of 5 Hz and loading amplitude of 10 kN, the hydrodynamic pressure distributions resulted from experiment and theoretical computation are nearly identical, and the corresponding hydrodynamic pressure peaks are 0.177 and 0.161 kPa, respectively.
- ballastless track /
- cracks /
- train /
- load /
- water pressure

HTML全文

参考文献(16)

王平,徐浩,陈嵘,等. 路基上CRTSⅡ型板式轨道裂纹影响分析[J]. 西南交通大学学报,2012,47(6): 929-934. WANG Ping, XU Hao, CHEN Rong, et al. Effects analysis of cracking of CRTS Ⅱ slab track on subgrade[J]. Journal of Southwest Jiaotong University, 2012, 47(6): 929-934.

任娟娟,严晓波,徐光辉,等. 底座板脱空对板式无砟轨道行车动力特性的影响[J]. 西南交通大学学报,2014,49(6): 951-966. REN Juanjuan, YAN Xiaobo, XU Guanghui, et al. Effect of contact loss underneath concrete roaded on dynamic performances of slab Track-subgrade system[J]. Journal of Southwest Jiaotong University, 2014, 49(6): 951-966.

徐桂弘,杨荣山,刘学毅. 荷载幅值对无砟轨道结构裂纹水压力影响[J]. 铁道工程学报,2015(1): 32-37. XU Guihong, YANG Rongshan, LIU Xueyi. Impact of load amplitude on the water pressure of non-ballasted track structure[J]. Journal of Railway Engineering Society, 2015(1): 32-37.

颜华,胡华锋,曾晓辉,等. 静水作用下板式无砟轨道CA砂浆力学性能变化[J]. 高速铁路技术,2014,5(4): 10-14. YAN Hua, HU Huafeng, ZENG Xiaohui, et al. Studies on mechanical changes of CA mortar for slab track under hydrostatic effect[J]. High Speed Railway Technology, 2014, 5(4): 10-14.

徐世烺,王建敏. 静水压力下混凝土双K断裂参数试验测定[J]. 水利学报,2007,38(7): 792-798. XU Shilang, WANG Jianmin. Experimental determination of double-K fracture parameters of concrete under water pressure[J]. Journal of Hydraulic Engineering, 2007, 38(7): 792-798.

BRHWILER E, SAOUMA V. Water Fracture interaction in concrete, part Ⅰ: racture properties[J]. ACI Materials Journal, 1995, 92(3): 296-303.

BRHWILER E, SAOUMA V. Water Fracture interaction in concrete, part Ⅱ: hydrostatic pressure in cracks[J]. ACI Materials Journal, 1995, 92(3): 383-390.

SLOWIK V, SAOUMA V. Water pressure in propagation concrete cracks[J]. Journal of Structural Engineering, 2000, 126(2): 235-242.

SHINMURA A, SAOUMA V. Fluid fracture interaction in pressurized reinforced concrete vessels[J]. Materials and Structures, 1997, 30(2): 72-80.

TINAWI R, GUIZANI L. Formulation of hydrodynamic pressure in cracks due to earthquakes in concrete dams[J]. Earthquake Engineering and Structural Dynamics, 1994, 23(7): 699-715.

JAVANMARD F, LEGER P, TINAWI R. Seismic structural stability of concrete gravity dams considering transient uplift pressures in cracks[J]. Engineering Structures, 2005, 27: 616-628.

中华人民共和国铁道部. 铁建设

[2005] 754 客运专线无砟轨道设计指南[S]. 北京:中国铁道出版社,2005.

陈长植. 工程流体力学[M]. 武汉:华中科技大学出版社,2008: 104-105.

吴家龙. 弹性力学[M]. 北京,高等教育出版社,2001: 109-114.

李宗利,任青文,王亚红. 岩石与混凝土水力劈裂缝内水压力分布的计算[J]. 水利学报,2005,36(6): 656-661. LI Zongli, REN Qingwen, WANG Yahong. Formula for water pressure distribution in rock or concrete fractures formed by hydraulic fracturing[J]. Journal of Hydraulic Engineering, 2005, 36(6): 656-661.

施引文献

附加材料(0)

访问统计