Journal of Northeastern University(Natural Science) ›› 2023, Vol. 44 ›› Issue (2): 289-298.DOI: 10.12068/j.issn.1005-3026.2023.02.018

• Resources & Civil Engineering • Previous Articles     Next Articles

Flexural Behavior and Influencing Parameters of Secant-Pipe-Roof Structure

TANG Xiu-jie1, ZHAO Wen1, LU Bo1, LI Wei-wei2   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou 510010, China.
  • Revised:2021-12-04 Accepted:2021-12-04 Published:2023-02-27
  • Contact: ZHAO Wen
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Abstract: Based on the flexural behavior test of the secant-pipe-roof structure(SPRS), the ABAQUS finite element software was used to establish the SPRS model. After verifying the model’s accuracy, the SPRS′s flexural behavior under loading was studied. The parameters of secant distance, steel tube diameter, steel tube thickness and steel bar diameter were selected for parameter analysis, and the flexural capacities of the structure under different parameter combinations were obtained. The results show that during the loading process, there is a significant redistribution of stress in the steel tube and the core concrete, and the SPRS has good anti-flexural behavior. The steel tube diameter is the most important factor affecting the flexural behavior of the SPRF. When the steel tube diameter is increased by 45.7%, the maximum flexural capacity of the structure can be increased by 294.3 %.

Key words: secant pipe roofing structure; finite element model; flexural behavior; stress redistribution; parameter analysis

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