Mechanical behaviors of “easy cracking zones” of precast rectangular utility tunnels

Wang, Shuhong; Jierula, Alipujiang; Wang, Pengyu; Zhao, Yong

doi:10.1016/j.cscm.2021.e00648

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…This section uses ABAQUS finite element software to establish a rectangular pipe jacking model 23 , 24 and analyse the shear response of the joint of the pipe section to better reveal the shear mechanical response of the F-type socket joint in a rectangular pipe jacking tunnel based on the laboratory joint test.…”

Section: Numerical Analysismentioning

confidence: 99%

Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

Xu,

Zhao,

Zhang

et al. 2023

Sci Rep

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The shear mechanical properties of F-type socket joints in rectangular pipe jacking tunnels are currently unknown. To investigate the shear mechanical response and deformation failure of the F-type socket joint in rectangular pipe jacking tunnels under different foundation coefficients, a laboratory joint test and numerical simulation method were used, considering the structural features of the joint. The results showed that the deformation process of a joint subjected to shear consists of four stages: gap closure, elastic growth, shear strengthening, and yield failure. The ultimate shear capacity of the joint increases by 25% to 34% for every 3 mm increase in the steel ring thickness. The chamfer yield damage area comprises approximately 15% of the steel ring. The joint concrete crack first appears at the top of the socket joint, and the concrete damage area accounts for about 40% of the whole pipe section. The failure characteristics of the joint are primarily manifested as drum and warp of the steel ring or cracking of the weld, and the concrete at the joint is crushed. In practical engineering, the weld should not be located at the chamfer. The steel ring at the chamfer needs to be locally strengthened, and the chamfer and the reinforcement at the top and bottom need to be increased to improve the bearing capacity of the concrete.

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Section: Numerical Analysismentioning

confidence: 99%

Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

Xu,

Zhao,

Zhang

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

Seismic Response of Utility Tunnel in Trapezoidal Backfilled Soil Under P Wave and Amplification Effect of Ground Motion

Zhang,

Wang

et al. 2024

Journal of Earthquake Engineering

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Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

Zhang

et al. 2023

Preprint

View full text Add to dashboard Cite

The shear mechanical properties of F-type socket joints in rectangular pipe jacking tunnels are currently unknown. To investigate the shear mechanical response and deformation failure of the F-type socket joint in rectangular pipe jacking tunnels under different foundation coefficients, a laboratory joint test and numerical simulation method were used, considering the structural features of the joint. The results showed that during shear deformation of pipe sections, the intermediate pipe is damaged centrosymmetrically. The deformation process of a joint subjected to shear consists of four stages: gap closure, elastic growth, shear strengthening, and yield failure. The ultimate shear capacity of the joint increases by 25–34% for every 3 mm increase in the steel ring thickness. The chamfer yield damage area comprises approximately 15% of the steel ring, while the concrete damage area comprises approximately 40%. The failure characteristics of the joint are primarily manifested as drum and warp of the steel ring or cracking of the weld, and the concrete at the joint is crushed and shows evidence of cracks.

show abstract

Mechanical behaviors of “easy cracking zones” of precast rectangular utility tunnels

Cited by 4 publications

References 37 publications

Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

Seismic Response of Utility Tunnel in Trapezoidal Backfilled Soil Under P Wave and Amplification Effect of Ground Motion

Shear mechanical response and deformation failure of F-type socket joint in a rectangular pipe jacking tunnel under different geologic conditions

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