Study on the longitudinal equivalent bending stiffness of quasi-rectangular assembled subway stations

被引：0
|
作者：
Huang L. [1 ,2 ]
Jiang K. [1 ]
Liang Y. [1 ,2 ]
Zhang Y. [1 ]
Ding Z. [3 ]
Du F. [3 ]
机构：
[1] School of Aeronautics and Astronautics, Shenzhen Campus of Sun Yat-sen University, Shenzhen
[2] School of Civil Engineering, Sun Yat-sen University, Zhuhai
[3] China Railway 14th Bureau Group Co., Ltd., Jinan
来源：
Journal of Railway Science and Engineering | 2024年 / 21卷 / 04期
关键词：
action range of the circumferential joint; longitudinal equivalent bending stiffness efficiency; longitudinal equivalent continuity model; neutral axis; quasi-rectangular assembled subway station;
D O I：
10.19713/j.cnki.43-1423/u.T20230921
中图分类号：
学科分类号：
摘要：
The longitudinal equivalent bending stiffness (EI)eq of quasi-rectangular assembled subway stations is a critical parameter in assessing mechanical behavior and plays an essential role in both the structural design of components and verification of bending bearing capacity. In order to analyze the longitudinal bending performance of an assembled subway station and its influencing factors, implicit expressions for the longitudinal equivalent bending stiffness (EI)eq and effective ratio of the longitudinal bending stiffness (η) were presented based on the corner calculation formula of an equivalent continuous beam. The influence of component length on the distance from the neutral axis to the x-axis, effective ratio of the longitudinal bending stiffness (η), and maximum stress on the cross-section were discussed through the analysis of section parameters. Furthermore, an in-depth analysis was conducted on the impact of thickness, radius of curvature, central angle of top and bottom plates, as well as semi-short axis length (b) on the maximum stress experienced by assembled components. In order to reflect the actual action range of the circumferential joint of the assembled station, the impact factor of circumferential joint (λ) was proposed, which extends the longitudinal equivalent continuity model of quasi-rectangular assembled linings. The findings indicate that the state of stress distribution in the cross-section and the value of η remains constant across different component lengths, with negligible impact from the direction of the bending moment. The maximum cross-sectional stress was greatly influenced by the semi-short axis length (b) when subjected to a constant bending moment. When the thickness of the top plate (t1) falls within the range of 0.6～2 m, an increase in semi-short axis length (b) results in a decrease of maximum tensile stress by 6.8% to 9.3%. When the thickness of the bottom component (t3) is between 0.6 m and 2 m, an increase in semi-short axis length leads to a reduction of maximum compressive stress by 62.5% to 63.6%. As λ increases from 0 to 1, effective ratio of the longitudinal bending stiffness (η) exhibits a progressively decreasing trend, declining from 1% to 0.05%. This result is consistent with the calculation conclusion of the longitudinal equivalent continuity model. The research findings offer valuable insights into the structural design and bending bearing capacity verification of prefabricated components for assembled subway stations. © 2024, Central South University Press. All rights reserved.
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页码：1554 / 1566
页数：12
相关论文
共 22 条
  • [11] YANG Xiuren, LIN Fang, HUANG Meiqun, Experimental research on flexural rigidity of grouted single mortise-tenon joints for prefabricated metro station structures[J], China Civil Engineering Journal, 53, 3, (2020)
  • [12] YUKIS Shiba, KAZUHIKO Kawashima, NAOMI Obinata, Calculation of internal force of structure during earthquake using response displacement method[C], Proceedings of the Civil Academy, pp. 385-394, (1989)
  • [13] LIAO Shaoming, Research on longitudinal shear transfer of circular tunnel, (2002)
  • [14] XU Ling, Study on longitudinal settlement of shield tunnel in soft soil, (2005)
  • [15] ZHANG Wenjie, XU Xu, LI Xianghong, Et al., Study on generalized longitudinal equivalent continuum model of shield tunnel, Chinese Journal of Rock Mechanics and Engineering, 28, (2009)
  • [16] LI Xiangyu, LIU Guobin, YANG Xiao, Et al., Deformation and stress of tunnel structures based on modified longitudinal equivalent continuous model[J], Chinese Journal of Geotechnical Engineering, 36, 4, (2014)
  • [17] LIANG Rongzhu, WANG Kaichao, HUANG Liang, Et al., Analytical solution for longitudinal equivalent bending stiffness of quasi-rectangular shield tunnels[J], Chinese Journal of Geotechnical Engineering, 44, 2, (2022)
  • [18] YANG Xiuren, Development status of and outlook for construction technology for prefabricated metro stations in China, Tunnel Construction, 41, 11, pp. 1849-1870, (2021)
  • [19] CHEN Jinnan, XU Chengshun, EL NAGGAR H M, Et al., Study on seismic performance and index limits quantification for prefabricated subway station structures, Soil Dynamics and Earthquake Engineering, 162, (2022)
  • [20] TAO Lianjin, SHI Cheng, DING Peng, Et al., Shaking table test of the effect of an enclosure structure on the seismic performance of a prefabricated subway station, Tunnelling and Underground Space Technology, 125, (2022)
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