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

IF 2.7 Q2 ENGINEERING, CIVIL

Sustainable and Resilient Infrastructure Pub Date : 2023-04-14 DOI:10.1080/23789689.2023.2200521

N. Do, Van Vi Pham, Daniel Dias

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.

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一种新的超静力反应法拟静力加载方案——以地震条件下的亚矩形隧道为例

摘要近年来，人们设计了许多不同的方法来计算圆形和矩形隧道中地震引起的结构力。然而，目前尚不清楚亚矩形隧道在承受地震荷载时的表现。采用超静力反应法（HRM）提出了一种新的亚矩形隧道拟静力加载方案。为了描述土壤和隧道衬砌之间的相互作用，开发了新的方程，该方程允许计算施加的主动载荷以及可变弹簧刚度系数。通过考虑各种地震震级、土壤参数、衬砌厚度、隧道尺寸、隧道几何形状和隧道深度的数值研究，对所提出的荷载方案进行了校准和验证。比较表明，所开发的HRM方法在亚矩形隧道初步抗震设计中是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sustainable and Resilient Infrastructure ENGINEERING, CIVIL-

CiteScore

7.60

自引率

10.20%

发文量

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.