{"title":"A new pseudo-static loading scheme for the hyperstatic reaction method - case of sub-rectangular tunnels under seismic conditions","authors":"N. Do, Van Vi Pham, Daniel Dias","doi":"10.1080/23789689.2023.2200521","DOIUrl":null,"url":null,"abstract":"ABSTRACT In 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.","PeriodicalId":45395,"journal":{"name":"Sustainable and Resilient Infrastructure","volume":"8 1","pages":"340 - 356"},"PeriodicalIF":2.7000,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sustainable and Resilient Infrastructure","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/23789689.2023.2200521","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
ABSTRACT In 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.
期刊介绍：
Sustainable and Resilient Infrastructure is an interdisciplinary journal that focuses on the sustainable development of resilient communities.
Sustainability is defined in relation to the ability of infrastructure to address the needs of the present without sacrificing the ability of future generations to meet their needs. Resilience is considered in relation to both natural hazards (like earthquakes, tsunami, hurricanes, cyclones, tornado, flooding and drought) and anthropogenic hazards (like human errors and malevolent attacks.) Resilience is taken to depend both on the performance of the built and modified natural environment and on the contextual characteristics of social, economic and political institutions. Sustainability and resilience are considered both for physical and non-physical infrastructure.
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