All Outputs (44)

Effect of Moisture and Temperature on FRP-strengthened Masonry Units (2025)
Presentation / Conference Contribution

This study investigates the effects of temperature and humidity on fibre-reinforced polymer (FRP) retrofitted masonry structures bonded with epoxy adhesive. Although FRP strengthening is widely used, there is limited understanding of how moisture and... Read More about Effect of Moisture and Temperature on FRP-strengthened Masonry Units.

Analytical Solutions Incorporating Interfacial Mode II Fracture Energy for Predicting the Shear Response of FRP-Strengthened Concrete Samples (2025)
Presentation / Conference Contribution

Fibre-reinforced polymers (FRPs) are widely used for strengthening and rehabilitating ageing concrete structures, with their effectiveness strongly influenced by the behaviour at the FRP-concrete interface. This study presents a closed-form analytica... Read More about Analytical Solutions Incorporating Interfacial Mode II Fracture Energy for Predicting the Shear Response of FRP-Strengthened Concrete Samples.

The application of scaling in progressive collapse studies (2025)
Journal Article

Investigating the progressive collapse of reinforced concrete structures presents significant challenges. Large-scale tests, essential for accurate representation, are costly, time-consuming, and exceed the capacity of modern labora... Read More about The application of scaling in progressive collapse studies.

Application of the applied element method to a reinforced concrete sub- assemblage under a column-removal scenario (2025)
Presentation / Conference Contribution

This paper validates and calibrates the applied element method (AEM) by modelling experimental results from the literature that examine the behaviour of reinforced concrete sub-assemblages under column-removal scenarios. Additionally, the paper ident... Read More about Application of the applied element method to a reinforced concrete sub- assemblage under a column-removal scenario.

INTERFACIAL BEHAVIOUR OF 3D PRINTED CONCRETE: FRESH AND HARDENED STAGE (2025)
Thesis

The construction industry faces significant challenges in meeting the demands of a growing population and urbanisation, which are compounded by environmental sustainability concerns and low productivity. The 3D Printing Concrete (3DPC) technology can... Read More about INTERFACIAL BEHAVIOUR OF 3D PRINTED CONCRETE: FRESH AND HARDENED STAGE.

Derivation of experimental debonding outputs for FRP-strengthened concrete samples through a fracture energy-based closed form approach (2025)
Journal Article

Numerous bond-slip models have been proposed in the literature to elaborate on the behaviour between concrete and FRP. However, in most of these bond-slip models, the interfacial debonding fracture energy of the bond is not explicit. Furthermore, the... Read More about Derivation of experimental debonding outputs for FRP-strengthened concrete samples through a fracture energy-based closed form approach.

Equilibrium-based Approach To Establish Hinge Locations In Single-span Back-filled Masonry Arch Bridges Under Arbitrary Surcharge (2024)
Presentation / Conference Contribution

The assessment of masonry arches has gained significant importance due to the substantial reliance of transportation infrastructure on historic structures. Over the past few decades, there has been a discernible shift in the focus towards understandi... Read More about Equilibrium-based Approach To Establish Hinge Locations In Single-span Back-filled Masonry Arch Bridges Under Arbitrary Surcharge.

Scaling Laws in Progressive Collapse Studies (2024)
Presentation / Conference Contribution

This state-of-the-art study introduces an innovative approach employing scaling laws to facilitate the utilisation of small-scale models in progressive collapse experimentation. It evaluates the quasi-static behaviour of scaled beam-column sub-assemb... Read More about Scaling Laws in Progressive Collapse Studies.

Unveiling the potential of scaling in progressive collapse studies (2024)
Presentation / Conference Contribution

Progressive collapse: Past, present, future and beyond (2024)
Journal Article

The world has seen a surge in rigorous study efforts on the progressive collapse of structures in the past few decades. These events have led to new standards and provisions in building codes of practice, many of which are still bei... Read More about Progressive collapse: Past, present, future and beyond.

Sensitivities Of Interfacial Bond-Sip Properties In Predicting The Behaviour Of FRP-Strengthened Concrete (2023)
Presentation / Conference Contribution

The performance of FRP-bonded concrete is heavily influenced by the properties of the bond between the two materials. Various bond-slip models incorporating interfacial bond properties have been developed to understand and predict this behaviour. In... Read More about Sensitivities Of Interfacial Bond-Sip Properties In Predicting The Behaviour Of FRP-Strengthened Concrete.

Generalised analytical solutions for linear and non-linear bond-slip models for externally bonded FRP to a concrete substrate (2023)
Journal Article
Augusthus Nelson, L., Weekes, L., Milani, G., & Al-Allaf, M. (2024). Generalised analytical solutions for linear and non-linear bond-slip models for externally bonded FRP to a concrete substrate. Engineering Structures, 298, https://doi.org/10.1016/j.engstruct.2023.117025

This article presents a set of novel analytical derivations from generalised bond-slip models using first principles, which can be used to predict experimental outcomes, including maximum load resistance, load-slip response, and strain throughout the... Read More about Generalised analytical solutions for linear and non-linear bond-slip models for externally bonded FRP to a concrete substrate.

Design of efficient steel trusses to resist progressive collapse (2022)
Journal Article
Elkady, N., Eljajeh, Y., Gilsenan, K., & Augusthus Nelson, L. (2022). Design of efficient steel trusses to resist progressive collapse. Structural engineer (London. 1988), 100(11), 14-17. https://doi.org/10.56330/jiot7288

Size effects in unreinforced and lightly reinforced concrete beams failing in flexure (2021)
Journal Article
Augusthus Nelson, L., Lees, J., & Weekes, L. (2022). Size effects in unreinforced and lightly reinforced concrete beams failing in flexure. Engineering Fracture Mechanics, 259, 107987. https://doi.org/10.1016/j.engfracmech.2021.107987

Fracture-based models commonly use a characteristic length as the basis for
determining size effects in concrete beams. The characteristic length is related
to the concrete fracture process zone and defined in terms of the concrete fracture propert... Read More about Size effects in unreinforced and lightly reinforced concrete beams failing in flexure.

The effect of metakaolin and hybrid polymers on the microstructure of concrete (2021)
Journal Article
concrete. Periodicals of engineering and natural sciences, 9(1), 162-173

It has been established that metakaolin (MK) can be applied as a supplementary cementitious material and
that some polymers can enhance substantial properties of concrete. Previous studies showed that, when used
in combination, MK and polymers can... Read More about The effect of metakaolin and hybrid polymers on the microstructure of concrete.

Experimental investigation of the residual behaviour of damaged masonry arch structures (2020)
Journal Article

New masonry arch bridges are rarely constructed as part of modern transport networks, however they continue to remain an integral part of modern civil infrastructure due to their overall resilience. This resilience has led to extremely long service l... Read More about Experimental investigation of the residual behaviour of damaged masonry arch structures.

Analytical modelling of bond-slip failure between epoxy bonded FRP and concrete substrate (2020)
Journal Article
Augusthus Nelson, L., Al-Allaf, M., & Weekes, L. (2020). Analytical modelling of bond-slip failure between epoxy bonded FRP and concrete substrate. Composite Structures, 251, 112956. https://doi.org/10.1016/j.compstruct.2020.112596

In this paper, a set of explicit theoretical derivations from a generalised
bond-slip model for an epoxy bonded fibre reinforced polymer (FRP) sheet
to concrete are presented. The derivations address the maximum bond resistance, load-slip response,... Read More about Analytical modelling of bond-slip failure between epoxy bonded FRP and concrete substrate.

Validation of a finite element modelling approach on soil-foundation-structure interaction of a multi-storey wall-frame structure under dynamic loadings (2020)
Journal Article

Validated numerical approaches are very important in dynamic studies of soil-structure interaction. Experimental outputs of physical models are required to validate the numerical approaches. Testing and analysis of an experimental scaled model is eco... Read More about Validation of a finite element modelling approach on soil-foundation-structure interaction of a multi-storey wall-frame structure under dynamic loadings.

Modeling the behavior of radially pinned brick triplets (2019)
Presentation / Conference
Haynes, J., Naggasa, A., Augusthus-Nelson, L., El-basir, F., & Alsaleh, A. (2019, October). Modeling the behavior of radially pinned brick triplets. Presented at 9th International Conference on Arch Bridges, Porto, Portugal

The continued use of many UK highway and railway masonry arch bridges is dependent upon maintaining robustness as the materials deteriorate over time. A common failure in multi-ring brickwork arches subject to fatigue, is ring separation.
This pape... Read More about Modeling the behavior of radially pinned brick triplets.

Sustainable high-performance concrete using metakaolin additive and polymer admixture : mechanical properties, durability and microstructure (2019)
Presentation / Conference Contribution

In recent years, there has been a growing interest in the use of supplementary cementitious materials and polymers to produce high-performance concrete. This paper shows the results of a study on the effect of metakaolin and polymer admixture on mech... Read More about Sustainable high-performance concrete using metakaolin additive and polymer admixture : mechanical properties, durability and microstructure.