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Progressive collapse: Past, present, future and beyond (2024)
Journal Article
Elkady, N., Augusthus Nelson, L., Weekes, L., Makoond, N., & Buitrago, M. (2024). Progressive collapse: Past, present, future and beyond. Structures, 62, 106131. https://doi.org/10.1016/j.istruc.2024.106131

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.

Uni- and tri-axial tests and property characterization for thermomechanical effect on hydrated lime modified asphalt concrete (2024)
Journal Article
Al-Ashaibi, A., Wang, Y., Albayati, A., Weekes, L., & Haynes, J. (2024). Uni- and tri-axial tests and property characterization for thermomechanical effect on hydrated lime modified asphalt concrete. Construction and Building Materials, 418, https://doi.org/10.1016/j.conbuildmat.2024.135307

Permanent deformation, fatigue and thermal cracking are the three typical distresses of flexible pavement. Using hydrated lime (HL) into the conventional limestone mineral additive has been widely practiced, including in Europe, to improve the mechan... Read More about Uni- and tri-axial tests and property characterization for thermomechanical effect on hydrated lime modified asphalt concrete.

Sensitivities Of Interfacial Bond-Sip Properties In Predicting The Behaviour Of FRP-Strengthened Concrete (2023)
Conference Proceeding
Augusthus Nelson, L., Weekes, L., & Milani, G. (2023). Sensitivities Of Interfacial Bond-Sip Properties In Predicting The Behaviour Of FRP-Strengthened Concrete. . https://doi.org/10.1007/978-3-031-44603-0_7

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.

Thermal properties of hydrated lime-modified asphalt concrete and modelling evaluation for their effect on the constructed pavements in service (2022)
Journal Article
Al Ashaibi, A., Wang, Y., Albayati, A., Byzyka, J., Scholz, M., & Weekes, L. (2022). Thermal properties of hydrated lime-modified asphalt concrete and modelling evaluation for their effect on the constructed pavements in service. Sustainability, 14(13),

Flexible pavements are subjected to three main distress types: fatigue crack, thermal crack, and permanent deformation. Under severe climate conditions, thermal cracking particularly contributes largely to a considerable scale of premature deteriora... Read More about Thermal properties of hydrated lime-modified asphalt concrete and modelling evaluation for their effect on the constructed pavements in service.

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.

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.

Kinky structures (2020)
Thesis
Currie, N. Kinky structures. (Thesis). University of Salford

Rotational springs are not widely used in structural engineering other than within undergraduate texts to aid with the understanding of strut buckling or other similar theoretical exercises. The inclusion of rotational springs can significantly alte... Read More about Kinky structures.

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
Qaftan, O., Toma-Sabbagh, T., Weekes, L., & Augusthus Nelson, L. (2020). Validation of a finite element modelling approach on soil-foundation-structure interaction of a multi-storey wall-frame structure under dynamic loadings. Soil Dynamics and Earthquake Engineering, 131, https://doi.org/10.1016/j.soildyn.2020.106041

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.

Response of soil–foundation–structure interaction of tall building (frame-wall) structural system under seismic effect (2019)
Thesis
Qaftan, O. (in press). Response of soil–foundation–structure interaction of tall building (frame-wall) structural system under seismic effect. (Thesis). University of Salford

The unavailability of standards or validated analysis techniques of estimating the soil -foundation-structure interaction (SFSI) lead to either simplifying or ignoring this interaction. The structural and geotechnical engineers consider the foundatio... Read More about Response of soil–foundation–structure interaction of tall building (frame-wall) structural system under seismic effect.

Experimental & numerical simulation of soil boundary conditions under dynamic effects (2018)
Presentation / Conference
Qaftan, O., Weekes, L., Toma-Sabbagh, T., & Augusthus Nelson, L. (2018, June). Experimental & numerical simulation of soil boundary conditions under dynamic effects. Presented at 16th European Conference on Earthquake Engineering (16ECEE), Thessaloniki, Greece

When conducting earthquake simulation tests, one of the main concerns is the modelling of boundary effects created by artificial boundaries of a soil model container. The function of this soil container is to hold the soil in place during the excitat... Read More about Experimental & numerical simulation of soil boundary conditions under dynamic effects.

Shear behaviour of lightweight concrete beams strengthened with CFRP composite (2018)
Journal Article
Al-Allaf, M., Weekes, L., & Augusthus Nelson, L. (2019). Shear behaviour of lightweight concrete beams strengthened with CFRP composite. Magazine of Concrete Research, 71(18), 949-964. https://doi.org/10.1680/jmacr.17.00488

This paper presents the experimental results obtained from lightweight and normal concrete beams with closed and U-shaped configurations of epoxy bonded Carbon FRP (CFRP) reinforcement in order to compare the shear resisting mechanisms between lightw... Read More about Shear behaviour of lightweight concrete beams strengthened with CFRP composite.

Theoretical assessment of progressive collapse capacity of reinforced concrete structures (2016)
Journal Article
Alogla, K., Weekes, L., & Augusthus Nelson, L. (2017). Theoretical assessment of progressive collapse capacity of reinforced concrete structures. Magazine of Concrete Research, 69(3), 145-162. https://doi.org/10.1680/jmacr.16.00319

The progressive collapse behaviour of reinforced concrete (RC) structures requires consideration of material and geometric non-linearity, concrete crushing and rebar fracture. Compressive arch action (CAA) and catenary action (CTA) are the main res... Read More about Theoretical assessment of progressive collapse capacity of reinforced concrete structures.

A new mitigation scheme to resist progressive collapse of RC structures (2016)
Journal Article
Alogla, K., Weekes, L., & Augusthus Nelson, L. (2016). A new mitigation scheme to resist progressive collapse of RC structures. Construction and Building Materials, 125, 533-545. https://doi.org/10.1016/j.conbuildmat.2016.08.084

Reinforced concrete structures may be vulnerable to progressive collapse due to lack of sufficient continuous reinforcement. In most guidelines, general structural integrity requirements to reduce progressive collapse have been introduced, but the de... Read More about A new mitigation scheme to resist progressive collapse of RC structures.

Progressive collapse resisting mechanisms of reinforced concrete structures (2016)
Presentation / Conference
Alogla, K., Weekes, L., & Augusthus Nelson, L. (2016, July). Progressive collapse resisting mechanisms of reinforced concrete structures. Presented at New Trends on Integrity, Reliability and Failure, Porto/Portugal

Reinforced concrete (RC) buildings may be vulnerable to progressive collapse due to lack of sufficient continuous reinforcement. Progressive collapse is a situation when local failure is followed by collapse of adjoining members, which in turn caus... Read More about Progressive collapse resisting mechanisms of reinforced concrete structures.

An experimental investigation into the bond-slip behaviour between CFRP composite and lightweight concrete (2016)
Journal Article
Mustafa, A., Weekes, L., Augusthus Nelson, L., & Leach, P. (2016). An experimental investigation into the bond-slip behaviour between CFRP composite and lightweight concrete. Construction and Building Materials, 113, 15-27. https://doi.org/10.1016/j.conbuildmat.2016.03.032

Epoxy bonded fibre reinforced polymer (FRP) composites are widely used for the retrofit of ailing reinforced concrete structures, for both shear and flexure. The behaviour of retrofitted concrete structures is governed by the bond strength and the ma... Read More about An experimental investigation into the bond-slip behaviour between CFRP composite and lightweight concrete.

Experimental study on bond-sip behaviour between CFRP sheets and lightweight concrete (2015)
Presentation / Conference
Mustafa, A., Weekes, L., & Augusthus Nelson, L. (2015, September). Experimental study on bond-sip behaviour between CFRP sheets and lightweight concrete. Presented at ACIC 2015, Cambridge, UK

Epoxy bonded fibre reinforced polymer (FRP) composites are widely used for the retrofit of ailing reinforced concrete structures, for both shear and flexure. The behaviour of retrofitted concrete structures is governed by the bond and material charac... Read More about Experimental study on bond-sip behaviour between CFRP sheets and lightweight concrete.

Biomimetic approach for the creation of a deployable structure based on the blooming of the Morning Glory flower (2015)
Presentation / Conference
Fenci, G., Currie, N., & Weekes, L. (2015, August). Biomimetic approach for the creation of a deployable structure based on the blooming of the Morning Glory flower. Presented at International Association for Shell and Spatial Structures (IASS) Symposium 2015 : Future Visions, Amsterdam, The Netherlands

This research project proposes the design of a freestanding, biomimetically inspired, deployable canopy. Nature inspires the structure in terms of mechanism and shape, allowing for the creation of a lightweight, multifunctional, and efficient deploya... Read More about Biomimetic approach for the creation of a deployable structure based on the blooming of the Morning Glory flower.

Optimised strategy by utilising BIM and set-based design : reinforced concrete slabs (2012)
Presentation / Conference
Bavafa, M., Kiviniemi, A., & Weekes, L. (2012, October). Optimised strategy by utilising BIM and set-based design : reinforced concrete slabs. Presented at Conseil International du Bâtiment (CIB) W078 2012 : 29th International Conference, Beirut, Lebanon

Considering the significant amount of material wasted in the construction industry there should be a business case for companies to pay more attention to reducing waste, which would also have a major impact on the environmental issues of the projec... Read More about Optimised strategy by utilising BIM and set-based design : reinforced concrete slabs.

Shear strengthening of reinforced concrete beams using an external Carbon Fibre Reinforced Polymer (CFRP) composites of low elastic modulus (2007)
Thesis
(CFRP) composites of low elastic modulus. (Thesis). Salford : University of Salford

Beam-column joints designed seismically are considered impractical due to the congestion of steel stirrups. Currently, CFRP is used for strengthening reinforced concrete structures that have reduced integrity due to corrosion of steel reinforcement... Read More about Shear strengthening of reinforced concrete beams using an external Carbon Fibre Reinforced Polymer (CFRP) composites of low elastic modulus.