PROPOSAL OF STRUCTURAL ANALYSIS METHOD FOR CIRCULAR DEEP SHAFT WITH OPENING FOR SHIELD TUNNEL

Since the stress around the opening of a circular shaft is complicated, it is difficult to properly model it in 2D analysis, and a vertical 2D beam model that is designed for safety is used based on past experience and experience. Often. However, it is not economical compared to the 3D model, and its effect is considered to be large especially when the opening is large. On the other hand, FEM analysis using a 3D model is very complicated, and the design method is not systematized, and the evaluation is based on the designer’s judgment. Therefore, in this study, by using 3D FEM analysis, the authors investigated the effects of an opening and a rail beam on the circular deep shaft behavior around the opening. The authors propose a rational 2D modeling method for the sidewall of the opening considering the 3D effect.

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  • English
  • Japanese

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  • Accession Number: 01768326
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Feb 18 2021 3:41PM