基于承载功能的地下结构抗震回弹评价方法的发展及其应用

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-10-02 DOI:10.1016/j.tust.2025.107134

Chao Ma , Xiaolei Li , Jingwei Chi , Dechun Lu , Guosheng Wang

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引用次数: 0

摘要

地下结构抗震评价是提高城市基础设施抗灾能力的关键问题之一。然而，传统的地震恢复力评估方法侧重于修复时间和经济损失等间接指标，忽视了结构功能的退化。本文旨在提出一种基于承载功能损失模型的地下框架结构抗震回弹评估分析框架和抗震回弹指标。该指标量化了抵抗弹性和恢复弹性，可用于描述弹性概念。为此，通过考虑地震的不确定性和地震时构件功能的退化程度，量化了地震荷载与结构构件承载功能之间的关系。随后，将地震回弹曲线扩展为地震回弹面，既强调了结构抗震能力因地震而退化的过程，又强调了结构抗震能力因恢复而增强的过程。此外，通过案例研究逐步介绍了分析框架的评估过程，重点是承载功能的退化。案例研究表明，目标结构在遭受频繁地震、罕见地震和极罕见地震时的抗震恢复指数分别降至0.70、0.52和0.43。在考虑可能发生地震的情况下，经过240天的修复，地震恢复指数可以恢复到初始水平。与传统的通过间接指标评估震后结构恢复力的方法相比，本文提出的分析方法为决策过程提供了可量化的功能评估指标。

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A development of seismic resilience evaluation method for underground structures based on load-carrying functionality and its application

The seismic resilience assessment of underground structures is one of the critical issues for improving the disaster adaptation capacity of urban infrastructures. However, traditional seismic resilience assessment methods focus on indirect indicators such as repair time and economic losses, neglecting the degradation of structural functionalities. This paper aimed to propose an analytical framework and seismic resilience index for assessing the seismic resilience of underground frame structures based on the loss model of load-carrying functionality. This seismic resilience index quantifies the resistance resilience and recovery resilience, which could be used to describe the resilience concept. For this purpose, the relationship between seismic loads and the load-carrying functionality of structural components was quantified by considering the uncertainty of earthquakes and the degree of degradation of the component functionality during earthquakes. Subsequently, the seismic resilience curve was expanded to a seismic resilience surface, which emphasizes the process of both the degradation of structural seismic capacity due to earthquakes and the enhancement of structural seismic capacity due to recovery. Additionally, the assessment procedure for the analytical framework is presented step-by-step through a case study, focusing on the degradation of the load-carrying functionality. Case study presented that the seismic resilience index of the target structures dropped to 0.70, 0.52, and 0.43 when suffered to frequent earthquakes, rare earthquakes, and very rare earthquakes, respectively. When considering earthquakes might be suffered, the seismic resilience index could be recovered to the initial level after 240 days of repair. Compared to the traditional method of assessing post-earthquake structural resilience through indirect indicators, the proposed analytical approach offered a quantifiable functional assessment indicator for the decision-making process.

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.