Experimental study on temperature field characteristics of CRTS III prefabricated slab track in cold regions

• Autorzy: Ren Juanjuan , Qu Changheng , Liang Jie , Zhang Peng , Zhang Kaiyao , Deng Shijie

Identyfikatory

DOI

10.1007/s43452-024-00921-w

• Języki publikacji: EN

Abstrakty

EN

A long-term monitoring experiment was conducted to investigate the spatial and temporal variation rule of the slab track temperature in cold regions using statistical analysis methods. The sensitivity of track temperature to meteorological factors was analyzed using the finite element method. The study found that temperature, solar radiation intensity, and full-section temperature of the track structure exhibit a reciprocal change with a daily cycle. Additionally, the temperature change of each structural layer lags with increasing depth. The measured data showed that the maximum positive and negative temperature gradient of the track slab exceeded the standard design value (90 °C/m, − 45 °C/m), suggesting that the design value of positive and negative temperature gradient in cold regions should be 95 °C/m and − 55 °C/m, respectively. Furthermore, the finite element model analysis indicated that the overall temperature of the track slab is strongly influenced by the daily average temperature, the solar radiation intensity, and the wind speed, while the temperature gradient of the track slab is strongly influenced by the daily temperature amplitude and solar radiation intensity. The maximum positive temperature gradient warning value of the track slab under extreme high-temperature weather was found to be 100 °C/m. These findings can provide valuable insights for the optimization design and temperature effect research of CRTS III prefabricated slab tracks in cold regions.

Słowa kluczowe

EN

meteorological factors; temperature field; slab track; spatial and temporal change rules

PL

czynniki meteorologiczne; pole temperatur; metoda elementów skończonych

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2024
• Tom: Vol. 24, no. 3
• Strony: art. no. e152, 2024
• Opis fizyczny: Bibliogr. 35 poz., rys., wykr.

Twórcy

autor

Ren Juanjuan

• School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
• State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

• https://orcid.org/0000-0001-9500-452X

autor

Qu Changheng

• School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
• State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

autor

Liang Jie

• School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
• State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

autor

Zhang Peng

• China Railway Development and Investment Group Co., Kunming 650500, People’s Republic of China

autor

Zhang Kaiyao

• School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
• State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

autor

Deng Shijie

• School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China
• State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610031, People’s Republic of China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)