干旱区生态环境知识资源中心(Arid): Experimental study and discrete element analysis on dynamic mechanical behaviour of railway ballast bed in windblown sand areas

Arid

DOI	10.1016/j.conbuildmat.2021.124669
	Experimental study and discrete element analysis on dynamic mechanical behaviour of railway ballast bed in windblown sand areas
	Xiao, Hong; Zhang, Zhihai; Chi, Yihao; Wang, Meng; Wang, Haoyu
通讯作者	Xiao, H (corresponding author), Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China.
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
EISSN	1879-0526
出版年	2021
卷号	304
英文摘要	Due to the limitation of the geological environment, many railways around the world are built in desert areas. The intrusion of sand particles can increase the stiffness of ballast beds and cause corrosion and fracture of fasteners, turnout blockage, etc., even affecting the service safety of railways. In the paper, based on the results of field and laboratory tests, a three-dimensional discrete element model of the sandy ballast bed is developed to study the effect of sand intrusion on the load sharing ratio of sleepers, contact forces between ballast particles, displacements of ballast particles, and energy dissipation in ballast beds. The results show that the axle load in sandy tracks is mainly shared by three sleepers under the single-axle load and six sleepers under the dual-axle load. The maximum contact force under the sleeper in the sandy ballast bed is about 80% larger than that in the clean ballast bed and its normal and tangential contact forces are also larger than that in the clean ballast bed. The ballast particles at the ballast shoulder of the clean ballast bed move downward in the direction of less than 45 degrees, while those in the sandy ballast bed move outward at the direction of 90 degrees. The sand intrusion inhibits the movement of ballast particles and may cause a rheological phenomenon of ballast particles at the ballast shoulder. The intrusion of sand particles mainly affects the elastic strain energy and damping energy in ballast beds but has less effect on friction energy and kinetic energy.
英文关键词	Windblown sand railway Field test Angle of repose test Load sharing ratio Movement of ballast particles Energy evolution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000696914000015
WOS关键词	LATERAL RESISTANCE ; SHEAR BEHAVIOR ; CONTAMINATION ; SLEEPER ; TESTS
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362905
作者单位	[Xiao, Hong; Zhang, Zhihai; Chi, Yihao] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China; [Xiao, Hong; Zhang, Zhihai; Chi, Yihao] Beijing Jiaotong Univ, Beijing Key Lab Track Engn, Beijing 100044, Peoples R China; [Wang, Meng] China Acad Railway Sci Co Ltd, Beijing 100081, Peoples R China; [Wang, Haoyu] Delft Univ Technol, Engn Struct Dept, Delft, Netherlands
推荐引用方式 GB/T 7714	Xiao, Hong,Zhang, Zhihai,Chi, Yihao,et al. Experimental study and discrete element analysis on dynamic mechanical behaviour of railway ballast bed in windblown sand areas[J],2021,304.
APA	Xiao, Hong,Zhang, Zhihai,Chi, Yihao,Wang, Meng,&Wang, Haoyu.(2021).Experimental study and discrete element analysis on dynamic mechanical behaviour of railway ballast bed in windblown sand areas.CONSTRUCTION AND BUILDING MATERIALS,304.
MLA	Xiao, Hong,et al."Experimental study and discrete element analysis on dynamic mechanical behaviour of railway ballast bed in windblown sand areas".CONSTRUCTION AND BUILDING MATERIALS 304(2021).