.png){kind=icon}
.png){kind=icon}
Return
Effects of temperature release measures on fatigue performance of CRTS II slab tracks on transition sections with different end spines
.png){kind=icon}
PRE
AI
R
J
J
Q
S
DOI：10.1016/j.istruc.2026.112441.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Weak longitudinal connection (WLC) and Unitization measures can effectively mitigate temperature stresses in China Railway Track System II (CRTS II) track slabs, but their effects on structural fatigue life remain inadequately understood. This study aims to numerically investigate the effects of these two temperature release measures on the fatigue performance of CRTS II slab tracks on transition sections with inverted T-shaped and π-shaped end spines under coupled temperature and train loads. Based on the Palmgren-Miner linear cumulative damage criterion, fatigue analysis models for CRTS II slab track with different temperature release measures on the two end spine transition sections are developed and validated. Subsequently, thermal stress, displacement reduction, and fatigue life of track slabs and two end spines under the WLC and unitization measures are analyzed and compared, respectively. The results indicate that both WLC and Unitization measures significantly reduce longitudinal and vertical stresses, as well as vertical displacement of the track slab. The Unitization measure reduces the maximum stress of the track slab on the inverted T-shaped and π-shaped end spines by 67.8% and 81.8%, outperforming the WLC measure of 35.3% and 76.0%, respectively. Under the Unitization measure, the fatigue life of the track slab on the inverted T-shaped and π-shaped end spines increases by 106% and 119.4%, which is higher than the increment obtained with the WLC measure of 4.5% and 8.63%, respectively. Moreover, the fatigue life of the π-shaped end spine is greater than that of the inverted T-shaped end spine, and the growth rates of fatigue life for both end spines are slightly higher than those of the track slabs.
Journal
IF:
4.3
Papers:
1.2W
Citations:
2.7W
Organization
Cited Papers