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A new pseudo-static loading scheme for the hyperstatic reaction method - case of sub-rectangular tunnels under seismic conditions

Authors :
Do, Ngoc Anh
Pham, Van Vi
DIAS, Daniel
Source :
Sustainable and Resilient Infrastructure; May 2023, Vol. 8 Issue: 3 p340-356, 17p
Publication Year :
2023

Abstract

ABSTRACTIn recent years, many different methods for calculating the structural forces caused by earthquakes to be created in circular and rectangular tunnels have been devised. However, it is still unclear how sub-rectangular tunnels would behave when subjected to seismic loadings. A new pseudo-static loading scheme for sub-rectangular tunnels using the Hyperstatic Reaction Method (HRM) is the main topic of the current paper. In order to depict the interaction between the soil and the tunnel lining, new equations that allow for the computation of applied active loading as well as a variable spring stiffness coefficient are developed. Through a numerical study that takes into account a variety of seismic magnitudes, soil parameters, lining thickness, tunnel dimension, tunnel geometries, and tunnel depth, the proposed loading scheme is calibrated and validated. The comparisons demonstrate the effectiveness of the developed HRM method for the preliminary seismic design of sub-rectangular tunnels.

Details

Language :
English
ISSN :
23789689 and 23789697
Volume :
8
Issue :
3
Database :
Supplemental Index
Journal :
Sustainable and Resilient Infrastructure
Publication Type :
Periodical
Accession number :
ejs63075027
Full Text :
https://doi.org/10.1080/23789689.2023.2200521