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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

邮发代号 80-968

2019 Impact Factor: 1.68

Frontiers of Structural and Civil Engineering  2023, Vol. 17 Issue (5): 763-779   https://doi.org/10.1007/s11709-023-0917-6
  本期目录
Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations
Hua-Fei HE, Zhao-Ping LI(), Shao-Lin MA, Xiang-Yang CUI
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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Abstract

A disadvantage of the conventional quasi-static test method is that it does not consider the soil restraint effect. A new method to test the seismic performance of prefabricated specimens for underground assembled structures is proposed, which can realistically reflect the strata restraint effect on the underground structure. Laboratory work combined with finite element (FE) analysis is performed in this study. Three full-scale sidewall specimens with different joint forms are designed and fabricated. Indices related to the seismic performance and damage modes are analyzed comprehensively to reveal the mechanism of the strata restraint effect on the prefabricated sidewall components. Test results show that the strata restraint effect effectively improves the energy dissipation capacity, load-bearing capacity, and the recoverability of the internal deformation of the precast sidewall components. However, the strata restraint effect reduces the ductility of the precast sidewall components and aggravates the shear and bending deformations in the core region of the connection joints. Additionally, the strata restraint effect significantly affects the seismic performance and damage mode of the prefabricated sidewall components. An FE model that can be used to conduct a seismic performance study of prefabricated specimens for underground assembled structures is proposed, and its feasibility is verified via comparison with test data.

Key wordsunderground structures    precast sidewall specimen    seismic test method    bearing capacity    energy dissipation capacity    plastic deformation
收稿日期: 2022-07-22      出版日期: 2023-07-14
Corresponding Author(s): Zhao-Ping LI   
 引用本文:   
. [J]. Frontiers of Structural and Civil Engineering, 2023, 17(5): 763-779.
Hua-Fei HE, Zhao-Ping LI, Shao-Lin MA, Xiang-Yang CUI. Effect of strata restraint on seismic performance of prefabricated sidewall joints in fabricated subway stations. Front. Struct. Civ. Eng., 2023, 17(5): 763-779.
 链接本文:  
https://academic.hep.com.cn/fsce/CN/10.1007/s11709-023-0917-6
https://academic.hep.com.cn/fsce/CN/Y2023/V17/I5/763
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No.loadingdirectionyield loadpeak loadfailure loadductility μ = ?u/?y
displacement (mm)load (kN)displacement (mm)load (kN)displacement (mm)load (kN)
CWJforward33.83611.2752.03682.7156.09580.301.66
backward?35.91?702.53?51.99?802.68?55.74?682.281.55
PTCWJforward34.62624.860.10714.1363.77607.011.84
backward?39.04?740.67?59.81?875.93?63.51?744.541.63
MTWJforward19.44232.6250.55330.9555.63281.312.86
backward?30.84?444.03?55.18?526.69?59.55?447.691.93
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dilation angle (° )plastic potential eccentricitystress ratioshape of the yielding surfaceviscosity parameter
300.11.160.66670.0005
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