Analysis of local damages effect on mechanical responses of underwater shield tunnel via field testing and numerical simulation

Xuyan Tan, Weizhong Chen, Luyu Wang, Jianping Yang

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
14 Downloads (Pure)

Abstract

The investigation of concrete structural performance is crucial to maintain the stability of infrastructure. In order to assess structural stability, this work focuses on the development of an integrated framework to detect damaged conditions in the field and analyze their effect on mechanical performance through nondestructive testing (NDT) technology and numerical models. First, a ground penetrating radar (GPR) and an infrared camera work collaboratively to identify the damaged positions of the concrete structure, with parameters calibrated by laboratory experiments. Then, a finite element model is established to study structural mechanical performance based on field conditions and detected results. In addition, the influenced regions induced by local damage are studied under different boundary conditions. As a case study, the devised method was employed in the Nanjing Yangtze River tunnel for stability assessment and disaster prevention. The detected results of the damaged conditions agree well with the actual conditions in the field. Numerical results show that the circumferential stress component is more significant than that observed longitudinally. The effect of local damage on stress implies a positive correlation with the rise of water pressure, in which the maximum stress response to the variation of water level is 45KPa per meter.

Original languageEnglish
Article number6575
Pages (from-to)1-14
Number of pages14
JournalApplied Sciences (Switzerland)
Volume10
Issue number18
DOIs
Publication statusPublished - 2020

Keywords

  • Damage
  • Mechanical response
  • Nondestructive testing
  • Numerical simulation
  • Underground structure

Fingerprint

Dive into the research topics of 'Analysis of local damages effect on mechanical responses of underwater shield tunnel via field testing and numerical simulation'. Together they form a unique fingerprint.

Cite this