All Outputs (11)

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.

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.

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), 7827. https://doi.org/10.3390/su14137827

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 deteriorat... 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.

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.

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

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.

An experimental investigation into the bond-slip behaviour between CFRP composite and lightweight concrete (2016)
Journal Article

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.