温升作用下CRTS<b>Ⅱ</b>型板宽窄接缝受力及损伤分析

刘笑凯; 刘学毅; 肖杰灵; 董佳佳

doi:10.3969/j.issn.0258-2724.20210946

温升作用下CRTSⅡ型板宽窄接缝受力及损伤分析

doi: 10.3969/j.issn.0258-2724.20210946

刘笑凯^{1, 2, 3,},
刘学毅^{1, 2},
肖杰灵^{1, 2, ,},
董佳佳^{1, 2}

1.
西南交通大学高速铁路线路工程教育部重点实验室，四川成都 610031
2.
西南交通大学土木工程学院，四川成都 610031
3.
中北大学环境与安全工程学院，山西太原 030051

基金项目: 国家自然科学基金（51978584，51778543）；山西省基础研究计划（20210302124452）

详细信息

作者简介:
刘笑凯（1990—），男，讲师，博士，研究方向为轨道结构与轨道力学，E-mail：jlallk@163.com

通讯作者:
肖杰灵（1978—），男，副教授，博士，研究方向为高速、重载轨道结构及轨道动力学，E-mail：xjling@swjtu.cn

中图分类号: U213.212
计量
- 文章访问数: 266
- HTML全文浏览量: 85
- PDF下载量: 36
- 被引次数: 0
出版历程
- 收稿日期: 2021-12-01
- 修回日期: 2022-02-24
- 网络出版日期: 2023-12-07
- 刊出日期: 2022-04-14

Analysis of Internal forces and Damage of Broad-Narrow Joint of CRTSⅡ Slab Track Under Temperature Rise

LIU Xiaokai^{1, 2, 3
,},
LIU Xueyi^{1, 2},
XIAO Jieling^{1, 2
, ,},
DONG Jiajia^{1, 2}

1.
MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
3.
School of Science, North University of China, Taiyuan 030051, China

摘要

摘要:
为研究宽窄接缝在温升作用下的受力和损伤，根据混凝土塑性损伤理论和内聚力理论，建立考虑新旧混凝土界面的宽窄接缝细部的有限元模型；计算不同温升条件下的宽窄接缝应力和损伤因子，并分析宽窄接缝强度和窄接缝宽度的影响. 研究结果表明：窄接缝挤碎是一种渐变受压损伤，宽、窄接缝交界处断裂是一种脆性受拉损伤；与宽、窄接缝交界处断裂相比，窄接缝挤碎对结构受力影响更大；宽窄接缝尺寸不均匀导致宽、窄接缝交界处垂向受拉，这是宽窄接缝产生损伤的主要原因；提高宽窄接缝的混凝土强度可有效降低垂向拉应力和受拉损伤，但对纵向应力和受压损伤影响较小；为改善受力并降低损伤，建议宽窄接缝混凝土与轨道板等强，并且宽窄接缝上下等宽.
- 无砟轨道 /
- CRTSⅡ型板式轨道 /
- 宽窄接缝
Abstract:
In order to study the internal forces and the damage of broad-narrow joint under a temperature rise, a detailed finite element model with the interface between old and new concrete is established on the basis of concrete damaged plasticity model and cohesive zone model. The damage parameters and stress under different temperature rises are calculated, and the effects of the concrete strength at broad-narrow joint and the narrow joint width are analyzed. The results show that the fracture at the junction between broad and narrow joints is a brittle tension failure, and the breakage of narrow joint is a gradual compression failure. Compared with the fracture at the junction between broad and narrow joints, the breakage of narrow joint has a greater impact on the structural stress. The vertical tension stress arising from the uneven geometry at the junction between broad and narrow joints is the main cause for the damaged broad-narrow joint. Increasing the broad-narrow joint strength reduces the longitudinal compression stress and the compression damage, but contribute less to the vertical tension stress and the tension damage. To reduce damage and improve strength, it is recommended to equate the widths for the broad and narrow joints and the strengths for the concrete at the broad-narrow joint and the slab.
- ballastless track /
- CRTS Ⅱ slab track /
- broad-narrow joint

HTML全文

图 1 平面应力状态下的屈服面

Figure 1. Yield surface in plane-stress state

下载: 全尺寸图片幻灯片

图 2 内聚力单元应力-位移关系

Figure 2. Stress-displacement relationship of cohesive element

下载: 全尺寸图片幻灯片

图 3 轨道结构有限元模型

Figure 3. Finite element model of track structure

下载: 全尺寸图片幻灯片

图 4 宽窄接缝细部有限元模型

Figure 4. Detailed finite element model of broad-narrow joint

下载: 全尺寸图片幻灯片

图 5 试验试件界面参数

Figure 5. Interface parameters of specimens in experiments

下载: 全尺寸图片幻灯片

图 6 界面的应力-位移曲线

Figure 6. Interfacial stress-displacement curves

下载: 全尺寸图片幻灯片

图 7 宽窄接缝的损伤云图

Figure 7. Damage contours of broad-narrow joint

下载: 全尺寸图片幻灯片

图 8 宽窄接缝的力学状态

Figure 8. Mechanical state of broad-narrow joint

下载: 全尺寸图片幻灯片

图 9 实际条件下损伤因子的变化

Figure 9. Variation of damage parameter in actual situations

下载: 全尺寸图片幻灯片

图 10 实际条件下应力的变化

Figure 10. Variation of normal stress in actual situations

下载: 全尺寸图片幻灯片

图 11 不同强度下宽窄接缝的损伤因子

Figure 11. Damage parameters of broad-narrow joint under different strengths

下载: 全尺寸图片幻灯片

图 12 不同强度下宽窄接缝的应力

Figure 12. Normal stress of broad-narrow joint under different strengths

下载: 全尺寸图片幻灯片

图 13 不同窄接缝宽度下宽窄接缝的损伤因子

Figure 13. Damage factors of broad-narrow joint under different widths of narrow joints

下载: 全尺寸图片幻灯片

图 14 不同窄接缝宽度下宽窄接缝的应力

Figure 14. Normal stress of broad-narrow joint under different widths of narrow joints

下载: 全尺寸图片幻灯片

表 1 界面参数

Table 1. Interface parameters

编号	拉伸刚度/ （GPa·m⁻¹）	拉伸强度/MPa	拉伸断裂能/ （N·m⁻¹）	剪切刚度/ （GPa·m⁻¹）	剪切强度/MPa	剪切断裂能/ （N·m⁻¹）
C55−砂浆	2.50	0.522	50.5	1.22	0.587	123.5
C55−C35	3.27	0.704	73.7	1.92	0.952	146.3
C55−C45	3.67	0.950	95.6	2.52	1.470	241.1
C55−C55	4.16	1.548	267.5	2.89	1.960	424.7

下载: 导出CSV

表 2 主要计算参数

Table 2. Main calculation parameters

部件	弹性模量/GPa	泊松比	热膨胀系数/℃	密度/（kg·m⁻³）	宽度/m	厚度/m
轨道板	36.0	0.20	1.0 × 10⁻⁵	2500	2.55	0.20
CA 砂浆	10.0	0.20	1.0 × 10⁻⁵	2000	2.55	0.03
宽窄接缝	31.5	0.20	1.0 × 10⁻⁵	2500

下载: 导出CSV

参考文献(19)

[1]	戴公连,葛浩. 桥上纵连板式无砟轨道初始状态特征统计分析[J]. 铁道工程学报,2020,37(9): 1-6. doi: 10.3969/j.issn.1006-2106.2020.09.001 DAI Gonglian, GE Hao. Statistical analysis of the initial state characteristics of the longitudinally connected ballastless track on bridge[J]. Journal of Railway Engineering Society, 2020, 37(9): 1-6. doi: 10.3969/j.issn.1006-2106.2020.09.001
[2]	刘笑凯,刘学毅,肖杰灵,等. 温度作用下纵连式无砟轨道垂向稳定性研究[J]. 西南交通大学学报,2018,53(5): 921-927,944. doi: 10.3969/j.issn.0258-2724.2018.05.007 LIU Xiaokai, LIU Xueyi, XIAO Jieling, et al. Vertical stability of longitudinal continuous ballastless track under temperature variation[J]. Journal of Southwest Jiaotong University, 2018, 53(5): 921-927,944. doi: 10.3969/j.issn.0258-2724.2018.05.007
[3]	FENG Q S, CHAO H Y, LEI X Y. Influence of the seam between slab and CA mortar of CRTSⅡ ballastless track on vibration characteristics of vehicle-track system[J]. Procedia Engineering, 2017, 199: 2543-2548. doi: 10.1016/j.proeng.2017.09.259
[4]	钟阳龙,高亮,侯博文. 不同植筋方案纵连板轨道砂浆层抗剪性能分析[J]. 西南交通大学学报,2018,53(1): 38-45,63. doi: 10.3969/j.issn.0258-2724.2018.01.005 ZHONG Yanglong, GAO Liang, HOU Bowen. Shear behavior of mortar layer in continuous slab track with different arrangement schemes of embedded steel bars[J]. Journal of Southwest Jiaotong University, 2018, 53(1): 38-45,63. doi: 10.3969/j.issn.0258-2724.2018.01.005
[5]	许玉德,缪雯颖,严道斌,等. 基于改进混合模式内聚力模型的无砟轨道层间损伤分析[J]. 铁道学报,2021,43(4): 125-135. doi: 10.3969/j.issn.1001-8360.2021.04.016 XU Yude, MIAO Wenying, YAN Daobin, et al. Analysis of interlayer interface damage in ballastless track based on improved mixed-mode cohesive zone model[J]. Journal of the China Railway Society, 2021, 43(4): 125-135. doi: 10.3969/j.issn.1001-8360.2021.04.016
[6]	闫斌,娄徐瑞利,谢浩然,等. 冻胀冻融作用下材料劣化对板式无砟轨道性能的影响[J]. 交通运输工程学报,2021,21(5): 62-73. doi: 10.19818/j.cnki.1671-1637.2021.05.005 YAN Bin, LOU Xuruili, XIE Haoran, et al. Effect of material deterioration on slab ballastless track performance under frost heaving and freezing-thawing[J]. Journal of Traffic and Transportation Engineering, 2021, 21(5): 62-73. doi: 10.19818/j.cnki.1671-1637.2021.05.005
[7]	LUBLINER J, OLIVER J, OLLER S, et al. A plastic-damage model for concrete[J]. International Journal of Solids and Structures, 1989, 25(3): 299-326. doi: 10.1016/0020-7683(89)90050-4
[8]	LEE J, FENVES G L. Plastic-damage model for cyclic loading of concrete structures[J]. Journal of Engineering Mechanics, 1998, 124(8): 892-900. doi: 10.1061/(ASCE)0733-9399(1998)124:8(892)
[9]	SARIKAYA A, ERKMEN R E. A plastic-damage model for concrete under compression[J]. International Journal of Mechanical Sciences, 2019, 150: 584-593. doi: 10.1016/j.ijmecsci.2018.10.042
[10]	PARK K, PAULINO G H. Cohesive zone models: a critical review of traction-separation relationships across fracture surfaces[J]. Applied Mechanics Reviews, 2011, 64(6): 060802.1-060802.20.
[11]	LÓPEZ-PUENTE J, ARIAS A, ZAERA R, et al. The effect of the thickness of the adhesive layer on the ballistic limit of ceramic/metal armours: an experimental and numerical study[J]. International Journal of Impact Engineering, 2005, 32(1/2/3/4): 321-336.
[12]	YANG J F, LIAN H J, NGUYEN V P. Study of mixed mode Ⅰ/Ⅱ cohesive zone models of different rank coals[J]. Engineering Fracture Mechanics, 2021, 246: 107611.1-107611.16.
[13]	中华人民共和国住房和城乡建设部. 混凝土结构设计规范: GB 50010—2010[S]. 北京: 中国建筑工业出版社, 2011.
[14]	张劲,王庆扬,胡守营,等. ABAQUS混凝土损伤塑性模型参数验证[J]. 建筑结构,2008,38(8): 127-130. doi: 10.19701/j.jzjg.2008.08.036 ZHANG Jin, WANG Qingyang, HU Shouying, et al. Parameters verification of concrete damaged plastic model of ABAQUS[J]. Building Structure, 2008, 38(8): 127-130. doi: 10.19701/j.jzjg.2008.08.036
[15]	李培刚. CRTSⅡ型板式轨道层间损伤及其影响研究[D]. 成都: 西南交通大学, 2015.
[16]	李再帏,吴刚,朱文发,等. 基于Lamb波的CRTSⅡ型板式无砟轨道层间损伤检测方法[J]. 铁道学报,2020,42(12): 120-126. doi: 10.3969/j.issn.1001-8360.2020.12.016 LI Zaiwei, WU Gang, ZHU Wenfa, et al. CRTSⅡ slab ballastless track interlayer damage detection method based on Lamb wave[J]. Journal of the China Railway Society, 2020, 42(12): 120-126. doi: 10.3969/j.issn.1001-8360.2020.12.016
[17]	赵国堂,刘钰. CRTSⅡ型板式无砟轨道结构层间离缝机理研究[J]. 铁道学报,2020,42(7): 117-126. ZHAO Guotang, LIU Yu. Mechanism analysis of delamination of CRTS Ⅱ slab ballastless track structure[J]. Journal of the China Railway Society, 2020, 42(7): 117-126.
[18]	张鹏飞,涂建,桂昊,等. 温梯荷载下桥上CRTSⅡ型板式无砟轨道的力学特性[J]. 西南交通大学学报,2021,56(5): 945-952. ZHANG Pengfei, TU Jian, GUI Hao, et al. Mechanical properties of CRTS Ⅱ slab ballastless track on bridge under temperature gradient loads[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 945-952.
[19]	欧祖敏,孙璐,程群群. 基于气象资料的无砟轨道温度场计算与分析[J]. 铁道学报,2014,36(11): 106-112. doi: 10.3969/j.issn.1001-8360.2014.11.021 OU Zumin, SUN Lu, CHENG Qunqun. Analysis on temperature field of ballastless track structure based on meteorological data[J]. Journal of the China Railway Society, 2014, 36(11): 106-112. doi: 10.3969/j.issn.1001-8360.2014.11.021