列车荷载对板式无砟轨道力学性能的影响分析

任娟娟; 邓世杰; 闫亚飞; 杜威; 倪跃峰

doi:10.3969/j.issn.0258-2724.20170642

列车荷载对板式无砟轨道力学性能的影响分析

doi: 10.3969/j.issn.0258-2724.20170642

任娟娟^1,2,,
邓世杰^1,2,
闫亚飞^1,2,
杜威^1,2,
倪跃峰^1,2

基金项目: 国家自然科学基金资助项目（51578472，U1434208）

详细信息

作者简介:
任娟娟（1983—），女，教授，博士，研究方向为高速重载轨道结构与轨道动力学，E-mail：344047965@qq.com，电话：13540805240

中图分类号: U213.21
计量
- 文章访问数: 499
- HTML全文浏览量: 241
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2017-09-07
- 修回日期: 2018-03-20
- 网络出版日期: 2018-03-21
- 刊出日期: 2019-12-01

Influence of Train Load on Mechanical Property of Prefabricated Slab Track

REN Juanjuan^{1,2
,},
DENG Shijie^1,2,
YAN Yafei^1,2,
DU Wei^1,2,
NI Yuefeng^1,2

摘要

摘要: 为研究无砟轨道混凝土在客、货车作用下的劣化规律，基于损伤力学概念，引入损伤变量对混凝土室内循环加载进行试验研究. 首先，建立钢轨-扣件-轨道板-CA砂浆层-底座板-地基有限元实体模型，获取试件试验等效应力水平，通过列车车速确定加载频率，然后确定合理的荷载组合模拟工况；其次，应用MTS加载系统对混凝土试件进行循环加载测试，利用无损检测系统测试了不同加载次数下混凝土的动弹性模量以及抗折强度；最后，将动弹性模量和抗折强度作为损伤变量，根据测试结果得到不同应力水平、加载频率作用对轨道板材料力学性能劣化规律的影响. 试验结果表明：在客货车荷载作用下，动弹性模量的损伤程度在加载200万次时约为抗折强度的损伤程度的2倍；应力水平一定时，加载频率越小，混凝土动弹性模量以及抗折强度的损伤程度越大，并且在10 Hz与15 Hz频率之间较明显；加载频率一定时，应力水平越大，混凝土动弹性模量以及抗折强度的损伤越严重，应力水平为0.7的混凝土在1 000次左右的加载循环加载下发生破坏；低速的客货车荷载会加快混凝土初期损伤，较高速度的客货车荷载会加速无砟轨道结构后期损伤的发展.
- 无砟轨道 /
- 列车荷载 /
- 材料劣化 /
- 损伤 /
- 应力水平 /
- 加载频率
Abstract: To study the influence of passenger and freight trains on the mechanical deterioration of concrete for slab track, the indoor cyclic loading test was conducted and described by using the damage variables based on damage mechanics. First, the FE model consisting of the rail, fastening, slab, CA mortar, roadbed, and subgrade was established. In this model, the reasonable load combination was determined contemplating the equivalent stress levels for the test specimens, as well as the loading frequencies for passing trains. Next, a cyclic loading test for concrete specimens was performed using a MTS loading system. Besides, the dynamic elastic module and the flexural strength for concretes at various loading cycles were calculated with the help of nondestructive testing system. Finally, taking the dynamic elastic modulus and the flexural strength as damage variables, the influences of different stress levels and loading frequencies on the deterioration of mechanical properties for the track slab were obtained. The results reveal that: under passenger or freight train load, the damage of dynamic modulus is about twice that of flexural strength at 2 million loading cycles. Keeping the stress level constant, the damage of dynamic modulus and flexural strength for concrete are greater with the lower loading frequency, especially between 10 Hz and 15 Hz. At a constant loading frequency, the damage of dynamic elastic modulus and flexural strength of concrete accelerates as the stress level increases. Concrete with a stress level of 0.7 is broken after about 1 000 loading cycles. Trains running at a lower speed would fasten the damage accumulation at the beginning of the deterioration process, while trains running at a higher speed would aggravate the consequential damage development.
- slab track /
- train loads /
- material deterioration /
- damage /
- stress level /
- loading frequency

HTML全文

图 1 CRTS I型板式无砟轨道力学计算模型

Figure 1. Mechanical calculation model of CRTS I slab track

下载: 全尺寸图片幻灯片

图 2 循环加载设备

Figure 2. Cycling loading equipment

下载: 全尺寸图片幻灯片

图 3 不同加载工况下混凝土力学性能衰减曲线

Figure 3. Degradation curve of concrete mechanical property under various load conditions

下载: 全尺寸图片幻灯片

图 4 混凝土力学性能变化规律

Figure 4. Degradation curve of concrete mechanical

下载: 全尺寸图片幻灯片

图 5 5种工况下混凝土损伤曲线

Figure 5. Degradation curves of concrete mechanical property

下载: 全尺寸图片幻灯片

表 1 轨道板底最大拉应力

Table 1. Maximum value of tensile stress at the bottom of track slab MPa

车型	荷载类型	A 处		B 处		C 处		D 处
车型	荷载类型	纵向	横向	纵向	横向	纵向	横向	纵向	横向
客车	1.0 倍轮重	0.60	0.78	0.79	0.74	0.74	0.73	0.72	0.73
	1.5 倍轮重	0.90	1.16	1.20	1.10	1.11	1.09	1.08	1.09
	3.0 倍轮重	1.80	2.32	2.37	2.18	2.22	2.17	2.17	2.17
货车	1.0 倍轮重	1.07	1.38	1.41	1.30	1.32	1.29	1.29	1.29
	1.5 倍轮重	1.61	2.07	2.11	1.95	1.98	1.94	1.94	1.94
	3.0 倍轮重	3.22	4.13	4.22	3.89	3.97	3.87	3.87	3.86

下载: 导出CSV

表 2 加载频率对应的车速

Table 2. Loading frequency corresponding to train speed km/h

车型	10 Hz	15 Hz	20 Hz
客车	90	120	180
货车	60	90	120

下载: 导出CSV

表 3 荷载组合模拟的车况

Table 3. Mombination of different stress levels and frequencies for train loads simulation

应力水平	频率/ Hz	模拟工况
0.3	10	低速货车
0.3	15	低速客车
0.5	15	普速货车
0.7	15	普速货车（最不利情况）
0.3	20	普速客车

下载: 导出CSV

表 4 混凝土试件抗折强度

Table 4. Flexural strength of the concrete specimens

试件编号	荷载/kN	平均值/kN	抗折强度/MPa
1-1	25.0	29.33	7.48
1-2	31.6
1-3	31.4
2-1	29.7	30.50	7.78
2-2	30.4
2-3	31.4
3-1	32.5	28.57	7.28
3-2	23.7
3-3	26.8
3-4	29.3
3-5	29.3
3-6	29.8

下载: 导出CSV

表 5 混凝土循环加载试验样本

Table 5. Concrete samples of cyclic loading test

工况	应力水平	加载频率/Hz	试件编号
1	0.3	10	1
1	0.3	10	2
2	0.3	15	3
2	0.3	15	4
3	0.5	15	5
3	0.5	15	6
4	0.7	15	7
4	0.7	15	8
5	0.3	20	9
5	0.3	20	10

下载: 导出CSV

表 6 混凝土力学指标衰变测试结果

Table 6. Mechanics indexes degradation results under the stress level

试件序号	加载次数/万次	动弹性模量/GPa	抗折强度/MPa
7	0	35.55	9.27
	97	32.83	8.94
	153	30.14	8.14
	194	27.39	8.07
	257	24.65	7.86
	267	20.54	6.85
7-1	0	28.47	6.75
7-1	0.2	破坏	破坏
7-2	0	27.98	6.48
7-2	0.1	破坏	破坏
7-3	0	27.61	6.47
7-3	0.1	破坏	破坏

下载: 导出CSV

参考文献(28)

何华武. 我国客运专线应大力发展无碴轨道[J]. 中国铁路,2005,1(1): 11-15. doi: 10.3969/j.issn.1001-683X.2005.01.001

HE Huawu. Ballastless track shall be developed in great efforts on Chinese passenger dedicated lines[J]. Chinese Railways, 2005, 1(1): 11-15. doi: 10.3969/j.issn.1001-683X.2005.01.001

陈希荣. 客货共线铁路实现重载运输的必要性分析研究[C]//中国科学技术协会、河南省人民政府.第十届中国科协年会论文集(一). [出版地不详]: 中国科学技术协会学会学术部, 2008: 5-10.

任娟娟,王吉,李家乐,等. 基于混凝土塑性损伤模型的轨道板损伤规律[J]. 浙江大学学报(工学版),2019,53(8): 1448-1456. doi: 10.3785/j.issn.1008-973X.2019.08.003

REN Juanjuan, WANG Ji, LI Jiale, et al. Damage law of track slab based on concrete damaged plasticity model[J]. Journal of Zhejiang University (Engineering Science), 2019, 53(8): 1448-1456. doi: 10.3785/j.issn.1008-973X.2019.08.003

任娟娟,田根源,徐家铎,等. 客货共线单元板式无砟轨道荷载作用特性与疲劳寿命预测[J]. 铁道学报,2019,41(3): 110-116. doi: 10.3969/j.issn.1001-8360.2019.03.015

REN Juanjuan, TIAN Genyuan, XU Jiaduo, et al. Load effect and fatigue life prediction of prefabricated slab track for mixed passenger and freight railway[J]. Journal of the China Railway Society, 2019, 41(3): 110-116. doi: 10.3969/j.issn.1001-8360.2019.03.015

VAN ORNUM J L. The fatigue of cement products[J]. Transactions of the American Society of Civil Engineers, 1903, 51(2): 443-445.

GRAF O, BRENNER E. Experiment for investigating the resistance of concrete under often repeated compression loads[J]. Deutseher Ausschuss fur Stahlbeton, 1934, 76: 17-25.

GRAF O, BRENNER E. Experiment for investigating the resistance of concrete under often repeated compression loads 2[J]. Deutseher Ausschuss fur Stahlbeton, 1936, 83: 45-53.

MARIGO J J. Modelling of brittle and fatigue damage for elastic material by growth of microvoids[J]. Engineering Fracture Mechanics, 1985, 21(4): 861-874. doi: 10.1016/0013-7944(85)90093-1

LACIDOGNA G, PIANA G, CARPINTERI A. Acoustic emission and modal frequency variation in concrete specimens under four-point bending[J]. Applied Sciences, 2017, 7(4): 339. doi: 10.3390/app7040339

马吉成,覃英宏. 高周加载频率对混凝土损伤的影响[J]. 路基工程,2008(1): 87-88. doi: 10.3969/j.issn.1003-8825.2008.01.043

丁兆东,李杰. 基于微-细观机理的混凝土疲劳损伤本构模型[J]. 力学学报,2014,46(6): 911-919. doi: 10.6052/0459-1879-14-041

DING Zhaodong, LI Jie. The fatigue constitutive model of concrete based on micro-meso mechanics[J]. Chinese Journal of Theoretical and Applied Mechanics, 2014, 46(6): 911-919. doi: 10.6052/0459-1879-14-041

卫军,李松林,董荣珍,等. 考虑残余变形影响的混凝土疲劳损伤本构模型[J]. 湖南大学学报(自然科学版),2016,43(7): 57-61.

WEI Jun, LI Songlin, DONG Rongzhen, et al. Fatigue damage constitutive model of concrete considering the effect of residual deformation[J]. Journal of Hunan University (Natural Sciences), 2016, 43(7): 57-61.

吕培印,李庆斌,张立翔. 定侧压混凝土双压疲劳损伤模型[J]. 工程力学,2004,21(5): 77-82. doi: 10.3969/j.issn.1000-4750.2004.05.018

LÜ Peiyin, LI Qingbin, Zhang Lixiang. Damage model for compression fatigue loading of concrete with uniaxial lateral confinement[J]. Engineering Mechanics, 2004, 21(5): 77-82. doi: 10.3969/j.issn.1000-4750.2004.05.018

ZHANG B, PHILLIPS D V, WU K. Effects of loading frequency and stress reversal on fatigue life of plain concrete[J]. Magazine of Concrete Research, 1996, 48(177): 361-375. doi: 10.1680/macr.1996.48.177.361

杨俊斌,赵坪锐,刘永孝,等. 列车荷载对CRTSⅠ型板式轨道疲劳损伤的影响研究[J]. 铁道标准设计,2013,10(1): 19-23.

YANG Junbin, Zhao Pingrui, LIU Yongxiao, et al. Influence of train load on fatigue damage to CRTS-I slab track[J]. Railway Standard Design, 2013, 10(1): 19-23.

朱胜阳,蔡成标. 一种高速铁路无砟轨道混凝土结构疲劳损伤模型[J]. 中国科学:技术科学,2014(7): 714-721.

ZHU Shengyang, CAI Chengbiao. A fatigue damage model of concrete structure for ballastless track in high-speed railway[J]. Scientia Sinica Technologica, 2014(7): 714-721.

李杰, 吴建营, 陈建兵. 混凝土随机损伤力学[M]. 北京: 科学出版社, 2014: 61-75.

刘学毅. 客运专线无砟轨道设计理论与方法[M]. 成都: 西南交通大学出版社, 2010: 88-92.

中华人民共和国建设部. 普通混凝土力学性能试验方法标准: GBT 50081—2002[S]. 北京: 中国建筑工业出版社.

聂彤辉. 冲击回波法现场检测结构混凝土强度及弹模的试验研究[D]. 北京: 北京建筑大学, 2013.

STRATULAT M S, BANU O M, TOMA A M, et al. Experimental assessment techniques for the dynamic properties of concrete[J]. Advanced Engineering Forum, 2017, 21: 226-233. doi: 10.4028/www.scientific.net/AEF.21.226

吕小彬,吴佳晔,李秀琳,等. 冲击回波测试混凝土试件弹性波波速研究[J]. 水利水电技术,2015,46(3): 84-90. doi: 10.3969/j.issn.1000-0852.2015.03.016

LÜ Xiaobin, WU Jiaye, LI Xiulin, at al. Study on elastic wave velocity of testing on concrete specimen with impactecho method[J]. Water Resources and Hydropower Engineering, 2015, 46(3): 84-90. doi: 10.3969/j.issn.1000-0852.2015.03.016

中国建筑科学研究院. 超声回弹综合法检测混凝土强度技术规程CECS02: 2005[M]. 北京: 中国建筑科学研究院, 2005: 15-16.

吴佳晔. 土木工程检测与测试[M]. 北京: 高等教育出版社, 2015: 133-135.

ALLICHE A. Damage model for fatigue loading of concrete[J]. International Journal of Fatigue, 2004, 26(9): 915-921. doi: 10.1016/j.ijfatigue.2004.02.006

宋玉普. 混凝土结构的疲劳性能及设计原理[M]. 北京:机械工业出版社, 2006: 5-36.

吕雁. 玻璃纤维混凝土弯曲疲劳性能及累积损伤研究[D]. 昆明: 昆明理工大学, 2012.

黄娟. 基于损伤理论的高速铁路隧道结构振动响应分析及疲劳寿命研究[D]. 长沙: 中南大学, 2010.

施引文献

附加材料(0)

访问统计