Failure response and beam effect of bolt reinforced layer: Numerical modelling using FDM-DEM coupling method

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-03-28 DOI:10.1016/j.engfailanal.2025.109562

Henghong Yang, Mingnian Wang, Li Yu, Xiao Zhang, Zhilong Wang, Dagang Liu

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引用次数: 0

Abstract

Bolts reinforcing surrounding rock is a common reinforcement method. In this paper, through finite-discrete element coupling numerical simulations and model tests, the beam effect within the bolt reinforcement layer (BRL) is visualized, and the failure response of the overall BRL is investigated. First, a finite-discrete element (FDM-DEM) coupled numerical model is developed to conduct loading failure tests on BRL. Second, model tests are conducted to validate the FDM-DEM numerical model, which exhibits concordance with the failure location, evolution process, failure load (σ_F), and ultimate load (σ_U) of experimental results observed in BRL. While BRL without bolt reinforcement (BRLW) presents a “fragmentation” failure, BRL exhibits a comprehensive deformation failure owing to the beam effect, characterized by minor rockfalls of the tunnel crown. Finally, a parameter analysis was conducted to investigate the impact of bolt length (L_b), bolt spacing (θ_s), and bolting range (θ_r) on the failure response and beam effect of BRL. The results suggest that the increase of L_b and θ_r and the decrease of θ_s will each strengthen the beam effect of BRL, consequently enhancing the σ_F and σ_U.

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来源期刊

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.