Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (6): 1669-1676.doi: 10.13229/j.cnki.jdxbgxb.20230075

Previous Articles    

Vertical load distribution mechanism of new steel sleeper bridge deck used for assembled truss beam

Zhi-xing SUN1,2(),Shi-tong CHEN1,2(),Man ZHAO3,Hong-wei XU3,Zhe-xin CHEN4   

  1. 1.State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    2.School of Safety Engineering and Emergency Management，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    3.School of Civil Engineering，Shijiazhuang Tiedao University，Shijiazhuang 050043，China
    4.Jinan Kingyue Highway Engineering Company Limited，Jinan 250101，China
  • Received:2023-01-28 Online:2023-06-01 Published:2023-07-23
  • Contact: Shi-tong CHEN E-mail:sunstar810@126.com;chst@stdu.edu.cn

RICH HTML

 0   

PDF (PC)

215

Abstract:

In order to solve the current situation that the reserve of existing bridge wooden sleepers is seriously insufficient and thus restricts the emergency use of assembled truss beams， a new type of steel sleepers instead of wooden sleepers was studied. To find out the vertical load distribution mechanism of the new steel sleeper used for assembled truss beam， full scale test of 4 m section and finite element simulation analysis were carried out. According to comparison between simulation and test， the influence of loading position， rail stiffness， chord stiffness， steel sleeper stiffness， and bridge vertical stiffness on vertical load distribution was discussed according to real bridge finite element model. It can be concluded that the actual distribution range of vertical load on the bridge sleepers is larger than the theoretical value. The steel sleeper at the position of chord joint bears larger proportion of load than the steel sleepers at the position between chord joints， and the stronger the support stiffness is， the larger the proportion of load is borne. The load extremum ratio of single sleeper borne decreases with the increase of rail stiffness， increases with the increase of steel sleeper stiffness， and has little relationship with the vertical stiffness of bridge structure. The increase of chord stiffness weakens the influence of loading position on the load extremum ratio of single sleeper born. The new type of steel sleeper can be applied to the deck of the assembled truss beams which are used to repair 16~32 m span bridges in common steel rail lines of Chinese railway. It can provide infrastructure support for the emergency repair of the assembled truss beams， and improve the reopened speed.

Key words: disaster prevention and mitigation engineering, steel sleeper, open deck, load distribution, assembled truss beam

CLC Number: 

  • U213.3

Fig.1

Front view of new steel sleeper bridge deck"

Fig.2

Load distribution test of steel sleepers of 4 m section"

Fig.3

Comparison of vertical load distribution of sleepers under three loading cases"

Table 1

Measured values and calculated values of the steel sleeper borned the maximum load of 4 m test section under each loading cases"

加载

工况

受力最大钢枕单枕承受轴重荷载最大百分比/%
试验值仿真值理论值荷载等级为207~759 kN的试验值波动差设计荷载为345 kN的试验值仿真值理论值

试验值/

仿真值

试验值/

理论值

C16#6#6#26.06~26.770.7126.3528.230.2693.487.1
C24#4#4#25.09~25.820.9225.3026.930.2694.183.6
C38#8#8#（9#）24.33~24.910.5824.3625.123.2397.1104.9

Fig.4

Maximum load borned results of single sleeper under each level of three loading cases"

Fig.5

Simulation model and loading cases of 16 m truss bridge"

Table 2

Load extremum ratio of single sleeper"

计算

工况

加载位置单枕荷载极值占比/%
1跨中上弦杆腹杆交叉节点28.6
2跨中左侧2 m位置上弦杆竖杆交叉节点27.6
3跨中左侧0.8 m位置钢枕正上方24.8
4跨中右侧1 m位置右侧节间跨中23.2
5跨中左侧4 m位置上弦杆腹杆交叉节点28.8
6跨中左侧6 m位置上弦杆竖杆交叉节点28.1

Fig.6

Maximum load borned results of single sleeper under each case of different types of rails"

Table 3

Load extremum ratio of single sleeper and the loading case of different types of rails"

轨道类型

对水平轴惯

性矩/cm4

单枕荷载极

值占比/%

加载工况
CHN45148934.26工况5
CHN50203731.90工况5
CHN60321728.76工况5
CHN75449026.68工况5

Fig.7

Maximum load borned results of single sleeper under each case of different types of chords"

Table 4

Load extremum ratio of single sleeper and the loading case of different types of chords"

弦杆编号

对水平轴惯

性矩/cm4

单枕荷载极值占比/%加载工况
313 14028.76工况5
50218 49528.18工况5
50123 85027.93工况5

Fig.8

Maximum load borned results of single sleeper under each case of different types of steel sleepers"

Table 5

Load extremum ratio of single sleeper and the loading case of different types of steel sleepers"

钢枕规格/mm惯性矩/cm4单枕荷载极值占比/%加载工况
F150×4807.8227.21工况5
F150×5982.1228.76工况5
F150×61145.9030.07工况5
F150×81411.8032.17工况5

Fig.9

Maximum load borned results of single sleeper under each case of different vertical stiffnesses of truss bridge"

Table 6

Load extremum ratio of single sleeper and loading case of different vertical stiffnesses of truss bridge"

桁梁跨度/m挠跨比

单枕荷载极

值占比 %

加载工况
161/242428.76工况5
241/105728.78工况5
321/50828.79工况5
1 曾志斌. 既有铁路木枕替代材料的研究现状及发展趋势[J]. 铁道建筑, 2016(8): 1-9.
Zeng Zhi-bin. Research status and development trend of alternative materials of exiting wooden sleepers[J]. Railway Engineering, 2016(8): 1-9.
2 井国庆, 杜文博, 付琪璋. 特殊功能轨枕种类及应用[J]. 中国铁路, 2021(5): 98-102.
Jing Guo-qing, Du Wen-bo, Fu Qi-zhang. Types and application of sleepers with special functions[J]. China Railway, 2021(5): 98-102.
3 Parvez A, Foster S J. Fatigue of steel-fibre-reinforced concrete prestressed railway[J]. Engineering Structures, 2017(141): 241-250.
4 Pachideh G, Gholhaki M. Using steel and polypropylene fibres to improve the performance of concrete sleepers[J]. Proceedings of the Institution of Civil Engineers—Structures and Buildings, 2020, 173(9): 690-702.
5 刘玉祥, 管吉波, 左一舟, 等. 一种新型钢筋桁架轨枕技术的研究[J]. 铁道工程学报, 2016(12): 88-92, 98.
Liu Yu-xiang, Guan Ji-bo, Zuo Yi-zhou, et al. Technical study of a new type of steel bar truss sleeper[J]. Journal of Railway Engineering Society, 2016(12): 88-92, 98.
6 陈成, 李建峰, 段永达, 等. 一种可调间距的X型抗滑动轨枕[P]. 中国: 01910091734.8, 2019-05-07.
7 邵壮, 孙井林, 陈学振, 等. 新型臂展式轨枕和Ⅲc型轨枕横向阻力试验和仿真研究[J]. 铁道勘察, 2022(5): 100-103, 124.
Shao Zhuang, Sun Jing-lin, Chen Xue-zhen, et al. Experimental and simulation study on the ballast bed lateral resistance of new arm-spread-type sleeper and standard IIIc sleeper[J]. Railway Investigation and Surveying, 2022(5): 100-103, 124.
8 庞玲, 强伟乐, 周强, 等. 新型钢枕道床横向阻力试验与分析[J]. 铁道工程学报, 2020(2): 40-45.
Pang Ling, Qiang Wei-le, Zhou Qiang, et al. Test and analysis of lateral resistance of innovated steel sleeper[J]. Journal of Railway Engineering Society, 2020(2): 40-45.
9 张鹏飞, 朱勇, 雷晓燕. 新型钢枕轨道结构受力特性影响因素分析[J]. 铁道标准设计, 2019, 63(9): 1-5.
Zhang Peng-fei, Zhu Yong, Lei Xiao-yan. Analysis of influence factors on mechanical characteristics of new steel sleeper track structure[J]. Railway Standard Design, 2019, 63(9): 1-5.
10 李保龙, 曾志斌, 王冬立, 等. 新型明桥面在重载铁路钢梁上的应用[J]. 铁道建筑, 2021, 61(3): 42-45.
Li Bao-long, Zeng Zhi-bin, Wang Dong-li, et al. Application of new type open deck on steel girder of heavy haul railway[J]. Railway Engineering, 2021, 61(3): 42-45.
11 井国庆, 杜文博, 尤瑞林, 等. 基于DIC 混凝土轨枕和复合轨枕受弯特征分析[J]. 铁道科学与工程学报, 2021, 18(1): 64-70.
Jing Guo-qing, Du Wen-bo, You Rui-lin, et al. Analysis of bending characteristics of FFU composite sleeper and concrete sleeper based on digital image correlation[J]. Journal of Railway Science and Engineering, 2021, 18(1): 64-70.
12 曾志斌. 纤维增强复合材料轨枕的技术参数和试验方法[J]. 铁道建筑, 2021, 61(2): 107-112, 121.
Zeng Zhi-bin. Technical parameters and test methods of sleepers made of fiber reinforced polymer[J]. Railway Engineering, 2021, 61(2): 107-112, 121.
13 孙孝红, 肖林, 李俊, 等. 明桥面木枕受力分析[J]. 铁道建筑, 2007(2): 82-83.
Sun Xiao-hong, Xiao Lin, Li Jun, et al. Load analysis of wooden sleeper on open deck of bridge[J]. Railway Engineering, 2007(2): 82-83.
[1] Li⁃bin ZHANG,Dao WU,Hong⁃ying SHAN,Xiang⁃jing DENG. Design of axle load self⁃adjusting system for multi⁃axle vehicle based on brake tester [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(4): 1081-1091.
[2] MAO Yu-ze, WANG Li-qin. Influence of squirrel-cage flexible support on the dynamic performance of ball bearing [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1508-1514.
[3] WANG Ji-xin, ZHAI Xin-ting, BI Ye-hong-tian, LI Ying-ying. Estimation of piecewise mixed load distribution based on AIC-K-means [J]. 吉林大学学报(工学版), 2018, 48(4): 1092-1098.
[4] ZHAO Chun-Jiang, LIANG Bo, GE Shi-Dong, HUANG Qing-Xue. Simplified matrix model for load distribution of highspeed ball bearing [J]. 吉林大学学报(工学版), 2010, 40(06): 1595-1598.
[5] ZHENG Jian-feng, GAO Zi-you . Congestion and load distribution in complex urban traffic networks [J]. 吉林大学学报(工学版), 2009, 39(增刊2): 31-0034.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd