One-dimensional semi-analytical model on longitudinal thermal loads of a tram track pile-plank structure buried beneath the pavement

• Autorzy: Shan Yao , Zhou Xiangliang , Zhou Shunhua

Identyfikatory

DOI

10.1007/s43452-021-00190-x

• Języki publikacji: EN

Abstrakty

EN

A novel pile-plank-supported ballastless tram track is employed in southeast of China to mitigate the foundation differential settlement in soft soil regions. In this structure, the channel rails are directly combined with the plank by fasteners and pads. In situ measurement data reveal that the foundation differential settlement is well controlled by this structure and the internal forces of the plank mainly depend on temperature variation. To assess the structural safety and improve the reinforcement design for the pile-plank structure, an efficient and precise calculation algorithm for internal forces of the structure is urgently required. In this work, a one-dimensional (1D) model is proposed to evaluate the longitudinal forces of the embedded pile-plank structure due to temperature variation. The constraints of rails and surrounding concretes (i.e., overlying pavement and the supporting layer) on the embedded structure are considered. The semi-analytical solution of this model is derived and a comprehensive calculation procedure is proposed. Based on the project of Shanghai Tram Line T1, a case study is undertaken to validate the proposed model. The results indicate that the maximum longitudinal displacement of the plank increases with the temperature variation. The critical displacement appears when the temperature variation rises to 15 ℃. The calculated longitudinal forces of the plank are in accordance with the in situ measurement data. This model provides a strong base to the reinforcement design of the pile-plank-supported ballastless tram track.

Słowa kluczowe

EN

tram track; pile-plank structure; semi-analytical solution; thermal load

PL

tor tramwajowy; obciążenie termiczne; krytyczne przemieszczenie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 1
• Strony: 599--616
• Opis fizyczny: Bibliogr. 34 poz., fot., rys., wykr.

Twórcy

autor

Shan Yao

• Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai, China
• Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Shanghai, China

• https://orcid.org/0000-0002-4301-1688

autor

Zhou Xiangliang

• China Railway Eryuan Engineering Group East China Survey and Design Co., Ltd, Hangzhou, China

autor

Zhou Shunhua

• Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai, China
• Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Shanghai, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)