Testing and modeling of cyclically loaded rock anchors

Tistel, Joar; Grimstad, Gustav; Eiksund, Gudmund

doi:10.1016/j.jrmge.2017.07.005

Cited by 16 publications

(6 citation statements)

References 18 publications

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“…Prestressed anchor cables have been widely applied as an effective rock mass reinforcement method in slopes (Koca et al, 2011;Xu et al, 2018), tunnels (Gao et al, 2016;Sun et al, 2019), mine roadways (Cao et al, 2020;, dams (Brown, 2015), geological disasters Xia et al, 2022;, and other projects (Tistel et al, 2017;. Prestressed anchor cables are usually made of steel strands or high-strength steel wires.…”

Section: Introductionmentioning

confidence: 99%

Water-Related Natural Disasters in Mountainous Area, volume II

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Section: Introductionmentioning

confidence: 99%

Water-Related Natural Disasters in Mountainous Area, volume II

2024

Frontiers Research Topics

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“…Prestressed anchor cables have been widely applied as an effective rock mass reinforcement method in slopes (Koca et al, 2011;Yang et al, 2015;Xu et al, 2018), tunnels (Gao et al, 2016;Sun et al, 2019), mine roadways (Cao et al, 2020;Shan et al, 2022), dams (Brown, 2015), geological disasters (Zheng H. et al, 2021;Xia et al, 2022;Yin et al, 2022), and other projects (Tistel et al, 2017;. Prestressed anchor cables are usually made of steel strands or high-strength steel wires.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the mechanical properties and failure modes of BFRP bar anchor systems under static tension loading

et al. 2023

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Basalt fiber-reinforced polymer bars are lightweight composite materials with high strength, low density, and excellent corrosion resistance. The anchor system made from basalt fiber-reinforced polymer bars is worthy of being developed and expected to be used in rock anchoring projects. In this work, four different basalt fiber-reinforced polymer anchor systems were designed, the influences of different design parameters on the ultimate bearing capacity of the anchor system were investigated through tension tests, and the failure modes of different anchor systems were elucidated. The test results indicated that failure modes, such as the transverse fracture of these bars and debonding of the bonding medium, were widely present in the wedge-modified anchor system and the steel-pipe-protected anchor system. These two anchor systems performed poorly with the wedge anchorage, whereas the basalt fiber-reinforced polymer bars protected by seamless steel pipes burst under the tension imposed by a universal testing machine. The threaded steel-pipe-bonded anchor system and the steel strand–basalt fiber-reinforced polymer bar composite anchor system had maximum anchorage efficiency coefficients of 97.7% and 98.5%, respectively. The bars in the corresponding test groups all exhibited burst failure, indicating that these two anchoring structures achieved effective anchorage of the basalt fiber-reinforced polymer bars.

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“…Huang(2018) proposed a method for calculating the critical anchorage length of anchor bolts and verified its feasibility through engineering case studies [16]. Based on the bonding effect, The anchorage length has a serious influence on the bearing capacity of anchor bolts and shear stress on interfaces under the effect of cyclic load [17][18][19]. The calculation formula for the critical anchorage length of anchor bolts can be deduced according to the principle of displacement compatibility between the anchorage body and surrounding rock [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Load transfer mechanism and critical length of anchorage zone for anchor bolt

Xu¹,

Tian²

2020

PLoS ONE

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The length of anchorage zone of an anchor bolt affects the distribution of axial force and shear stress therein. Based on a shear-displacement model, the load distribution of anchor bolts in the elastic deformation stage was analysed. Moreover, the mechanical response of threaded steel anchor bolts with different anchorage lengths was explored through pull-out test and numerical simulation. The results showed that axial force and shear stress were negatively exponentially distributed within the anchorage zone of anchor bolts in which there were the maximum axial force and shear stress at the beginning of the anchorage zone. In the elastic deformation stage of the anchorage, the longer the anchorage length, the more uniformly the shear stress was distributed within the anchorage zone and the larger the ultimate shear stress; however, there was a critical anchorage length, which, when exceeded, the ultimate shear stress remained unchanged. The calculation formula for the critical anchorage length was deduced and a reasonable anchorage length determined. The research result provides an important theoretical basis for rapid design of support parameters for anchor bolts.

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Testing and modeling of cyclically loaded rock anchors

Cited by 16 publications

References 18 publications

Water-Related Natural Disasters in Mountainous Area, volume II

Water-Related Natural Disasters in Mountainous Area, volume II

Experimental study on the mechanical properties and failure modes of BFRP bar anchor systems under static tension loading

Load transfer mechanism and critical length of anchorage zone for anchor bolt

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