Otto Terjesen

• Terjesen, Otto; Pinto, Gianclaudio; Kanstad, Terje & Tan, Jesus Reignard Medel (2024). Performance study of crack width calculation methods according to Eurocodes, fib model codes and the modified tension chord model. Structural Concrete. ISSN 1464-4177. p. 1–25. doi: 10.1002/suco.202300367.
• Larsen, Ingrid Lande; Terjesen, Otto; Thorstensen, Rein Terje & Kanstad, Terje (2019). Use of Concrete for Road Infrastructure: A SWOT Analysis Related to the three Catchwords Sustainability, Industrialisation and Digitalisation. Nordic Concrete Research. ISSN 0800-6377. 60(1), p. 31–50. doi: 10.2478/ncr-2019-0007. Full text in Research Archive Show summary

  This paper aims at identifying the direction for more sustainable development of the use of concrete in road infrastructure in an industrialised context. The increase in the global mean temperature is one of the most severe challenges today. The concrete industry is responsible for significant emissions of greenhouse gases, most attributable to cement production. However, concrete is one of the most important building materials in the world and indispensable for the societal development in countries at all development stages. Thus, the concrete industry needs to take measures for reducing emissions. This paper investigates possible directions for the development of the concrete industry, to reduce climatic impact and accommodate positive societal growth. The investigation is carried out as a SWOT analysis, focusing on three terms dominating the present discussion on any development within the construction industry; sustainability, industrialisation and digitalisation. The result is a thorough discussion and a set of recommendations for the direction of future research and innovation on sustainable use of concrete in the construction of road infrastructure. The major opportunities and threats are summarised in the conclusions, and future research to be carried out in two of the authors’ PhD-projects are described.

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• Terjesen, Otto; Kanstad, Terje & Tan, Jesus Reignard Medel (2022). Application of NLFEA for crack width calculations in SLS. Show summary

  In this paper, computer-based simulation is carried out using the Finite Element Analysis (FEA) package Abaqus to study crack widths in reinforced concrete beams. A set of experimentally tested beams are investigated, and measured crack widths are compared with crack widths predicted by nonlinear FEA (NLFEA) and relevant design codes. It is shown that Eurocode 2 (EC2), fib Model Code 2010 (MC2010) and the draft for new EC2 underestimates the crack widths at the outermost concrete face to different extents while they are conservative at reinforcement level. Crack widths predicted by NLFEA, on the other hand, provides good crack width predictions at the outermost concrete face for both investigated beams.

• Terjesen, Otto; Kanstad, Terje & Vertes, Katalin (2019). Digitalisation in modern concrete bridge design: Evaluation of various approaches used for SLS-design in selected computer programs. In et al., , (Eds.), Workshop Proceedings from a Nordic Workshop. Oslo Norway, October 16th-17th, 2019 Design and construction of sustainable concrete structures: causes, calculation and consequences of cracks . Norsk betongforening. ISSN 978-82-8208-069-9. p. 33–34.
• Terjesen, Otto (2024). Formulation of a consistent crack width calculation method for reinforced concrete members. Universitetet i Agder. ISSN 978-82-8427-190-3. Full text in Research Archive

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