Characteristics of transient pressure in lining cracks induced by high-speed trains

被引：12

作者：

Chen, Yibo ^{[1
,2
,4
]}

Gao, Yang ^{[3
,4
]}

Shi, Songhan ^{[3
,4
]}

Xu, Fei ^{[1
,3
]}

Zhao, Weigang ^{[3
,4
]}

机构：

[1] Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Key Lab Transportat Tunnel Engn, Minist Educ, Chengdu 610031, Sichuan, Peoples R China

[3] Shijiazhuang Tiedao Univ, Sch Safety Engn & Emergency Management, Shijiazhuang 050043, Hebei, Peoples R China

[4] Key Lab Hlth Monitoring & Control Large Struct He, Shijiazhuang 050043, Hebei, Peoples R China

来源：

JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS | 2022年 / 228卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

High-speed railway tunnel; Lining; Crack; Transient pressure; Damage; NUMERICAL-SIMULATION; AERODYNAMIC PRESSURE; TUNNEL; FLOW; WAVE; MECHANISM; EVOLUTION; BEHAVIOR; LENGTH;

D O I：

10.1016/j.jweia.2022.105120

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Rapidly changing pressure waves in the tunnel can aggravate the crack propagation and cause concrete blocks to fall off, posing a threat to trains. Therefore, the influences of aerodynamic pressure on the lining cracks should be considered for high-speed railway tunnels in service. In this paper, the governing equations of air in cracks were derived based on the conservation of mass, momentum, and energy, which was verified by numerical simulations using the software FLUENT. The proposed model was used to analyze the influence of train speed and crack shape on the pressure distribution, peak value and pressure waveform in the crack. Subsequently, the crack tip damage was calculated. The results show that the abrupt change of pressure can amplify the pressure and damage of the crack tip, which can be aggravated by the increase of train speed and crack mouth width.

引用

页数：11

共 43 条

[1]

[Anonymous], 2007, Aerodynamics

[2] Tunnel maintenance in Japan [J].