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Probabilistic modelling of fibre reinforced shotcrete
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.ORCID iD: 0000-0001-8375-581X
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.
2019 (English)In: Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress, CRC Press, 2019, p. 3105-3112Conference paper, Published paper (Refereed)
Abstract [en]

Shotcrete is widely used as rock support and can support the load from blocks either by bonding to the rock or by bending between rock bolts. By introducing fibres, the ductility of the shotcrete will increase and the crack widths decrease. Predictions of the structural behaviour for fibre reinforced shotcrete (FRS) are however complicated due to the large scatter normally seen in test results. The reason is mainly related to the non-uniform distribution and orientation of the fibres which could lead to uncertainties regarding the quality of in-situ shot-crete. The aim with this paper is therefore to investigate if a probabilistic material model for FRS can be used to capture the scatter in the results. An isotropic damage model that combines an exponential softening curve for unreinforced shotcrete and a bi-linear curve to account for the effect of fibres were used. Suitable distributions for each of the parameters in the model have been proposed based on fitting of experimental results. Thereafter, Monte Carlo simula-tions were used to produce results for a large number of lab tests. Results show that the model together with the proposed distributions was able to capture the scatter in test results.

Place, publisher, year, edition, pages
CRC Press, 2019. p. 3105-3112
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering, Concrete Structures
Identifiers
URN: urn:nbn:se:kth:diva-260966DOI: 10.1201/9780429424441-329Scopus ID: 2-s2.0-85068357299ISBN: 9781138388659 (print)OAI: oai:DiVA.org:kth-260966DiVA, id: diva2:1356198
Conference
World Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019; Naples; Italy; 3 May 2019 through 9 May 2019
Note

QC 20191112

Available from: 2019-10-01 Created: 2019-10-01 Last updated: 2019-11-12Bibliographically approved

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Sjölander, AndreasAnsell, Anders

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