土-结构动力作用体系混合试验研究进展与探讨

Translated title of the contribution: Review and Discussion on Recent Progress of Hybrid Simulation for Soil-structure Dynamic Interaction System

Hai Tao Yu, Yan Xi Li

Research output: Contribution to journalReview articlepeer-review

6 Scopus citations

Abstract

The problem of soil-structure interaction often requires an experimental approach to validate the reasonability of corresponding theories. As a combination of physical tests and numerical simulations, hybrid simulation demonstrates the merits of both numerical and physical methods. Recently, there have been many developments and extensions to practical applications in several fields. The soil-structure interaction system is one of the major application fields in hybrid simulation. With consideration of different research purposes, this paper summarizes the development of hybrid simulation in the field of soil-structure interaction and divides the hybrid simulation into three types: the soil treated as a numerical subdomain and the structure as an experimental subdomain; the soil treated as an experimental subdomain and the structure as a numerical subdomain; and the hybrid simulation of stratigraphic characteristics. Hybrid simulation has provided an effective tool for exploring the interaction mechanism of soil-structure dynamic systems, including traditional soil-structure interaction systems such as multi-span bridge structures and frame structures with shallow foundations, as well as complex soil-structure interaction systems such as pile foundations surrounded by liquefied sites, jack-up platform foundations, and tunnel-pile-superstructure systems. Later, preliminary investigations of the hybrid simulation of underground structures subjected to strong earthquake motions carried out by the authors' group are briefly introduced. The hybrid test framework for underground structures was established based on the OpenSees-OpenFresco platform and was validated by comparison with finite element results, taking Daikai station as an example. In addition, the accuracy of the hybrid simulation with different loading boundary conditions is also discussed. The results show that the predictions from the proposed virtual hybrid simulation match well with those from the pure finite element simulation. The predicted results are very close under the loading boundary conditions with an inflection point or with a complete three-direction loading subjected to a low-level excitation (0.12g). However, a large difference between the results from these two loading boundary conditions is observed under a high-level excitation (0.58g). Finally, a couple of important unsolved problems, as well as suggestions for future developments in the hybrid simulation of soil-structure interaction systems, are also discussed in this paper.

Translated title of the contributionReview and Discussion on Recent Progress of Hybrid Simulation for Soil-structure Dynamic Interaction System
Original languageChinese (Traditional)
Pages (from-to)105-117
Number of pages13
JournalZhongguo Gonglu Xuebao/China Journal of Highway and Transport
Volume33
Issue number12
DOIs
StatePublished - Dec 2020
Externally publishedYes

Keywords

  • Hybrid test
  • Numerical substructure
  • Physical substructure
  • Review
  • Seismic analysis of underground structures
  • Soil-structure dynamic interaction
  • Tunnel engineering

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