Evolution of cracking damage and load-bearing performance of in-service tunnel linings with cracks

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-02-20 DOI:10.1016/j.tafmec.2025.104897

Zhi Lin , Wanlin Feng , Kaixin Jin , Xiang Chen , Hongyun Yang , Yongbo Hu

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Abstract

China ranks first globally in tunnel scale and quantity, and as service life increases, a significant number of operational tunnels are exhibiting varying degrees of cracking and damage. Understanding the evolution of cracks and load-bearing performance in cracked tunnel linings under load has gradually become a research hotspot in the industry. This provides technical support for maintenance decisions, thereby enhancing the safety and lifespan of tunnel structures.

This paper conducted full-scale tests on tunnel arch lining components and established a concurrent multi-scale numerical model of the full tunnel lining ring. Results shows that: 1) The fracture mechanism of tunnel lining is complex. The fracture initiation stage shows mixed Mode I/II fracture type fracture, then Mode I fracture type fracture in rapid development stage, and the mixed fracture mode again in failure stage. 2)existing cracks accelerate damage evolution and significantly reduce load-bearing capacity compared to intact linings. 3) The tunnel lining showed obvious multi-stage crack propagation process. When horizontal crack propagation occurs, or the crack height reaches about 60% of the section height, the structure can be considered to enter the accelerated failure stage. 4) The damage and distribution characteristics of the inner surface of the lining are different during the secondary expansion of cracks under different lining damage states, based on which the internal damage status of the structure can be preliminarily assessed.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.