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All Outputs (39)

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.

Long term durability properties of concrete modified with metakaolin and polymer admixture (2018)
Journal Article
Al Menhosh, A., Wang, Y., Wang, Y., & Augusthus Nelson, L. (2018). Long term durability properties of concrete modified with metakaolin and polymer admixture. Construction and Building Materials, 172, 41-51. https://doi.org/10.1016/j.conbuildmat.2018.03.215

Previous studies show that both metakaolin (MK) and polymer can respectively improve certain mechanical and durability properties of concrete. Also, recent studies show that a combination of MK and polymer further enhances the mechanical properties b... Read More about Long term durability properties of concrete modified with metakaolin and polymer admixture.

An experimental study of the cathodic polarization of the reinforcement in chloride contaminated concrete (2017)
Presentation / Conference
Oleiwi, H., Wang, Y., Curioni, M., Augusthus Nelson, L., Chen, X., & Shabalin, I. (2017, September). An experimental study of the cathodic polarization of the reinforcement in chloride contaminated concrete. Presented at 20th International Corrosion Congress & Process Safety Congress (EUROCORR 2017), Prague

This paper reports an experimental study on the influence of chloride contamination on the polarization resistance, concrete resistivity, and the potential shift of concrete reinforcement under different cathodic protection (CP) current densities. Re... Read More about An experimental study of the cathodic polarization of the reinforcement in chloride contaminated concrete.

Experimental study of cathodic protection for reinforced concrete submerged in saline water (2017)
Presentation / Conference
Oleiwi, H., Wang, Y., Curioni, M., Augusthus Nelson, L., Chen, X., & Shabalin, I. (2017, September). Experimental study of cathodic protection for reinforced concrete submerged in saline water. Presented at 20th International Corrosion Congress & Process Safety Congress (EUROCORR 2017), Prague

Cathodic protection (CP) has been approved in practice to be an effective technique to protect steel reinforcement in concrete from corrosion under severe environmental conditions. Using constant current for CP is the most popular approach in practic... Read More about Experimental study of cathodic protection for reinforced concrete submerged in saline water.

Large-scale physical modelling of soil-filled masonry arch bridges (2017)
Journal Article
masonry arch bridges. International Journal of Physical Modelling in Geotechnics, 18(2), 81-94. https://doi.org/10.1680/jphmg.16.00037

The presence of soil backfill has been shown to have a significant influence on the
load-carrying capacity of masonry arch bridges, with the soil fill providing a number of
important functions, including inter alia, the distribution of surface load... Read More about Large-scale physical modelling of soil-filled masonry arch bridges.

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.

Proposed permissible limit state assessment criteria for masonry arch bridges (2016)
Presentation / Conference
Gilbert, M., Melbourne, C., Smith, C., Augusthus Nelson, L., & Swift, G. (2016, October). Proposed permissible limit state assessment criteria for masonry arch bridges. Presented at ARCH '16. Proceedings of the 8th International Conference on Arch Bridges, Wroclaw, Poland

The Ultimate Limit State (ULS) is commonly used when assessing masonry arch bridges. Traditionally one or more, relatively large, partial factors are applied to the ULS to determine the level of service loading that can be safely applied to a given b... Read More about Proposed permissible limit state assessment criteria for masonry arch bridges.

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.

Two-dimensional experimental and numerical modelling of a soil-filled masonry arch (2015)
Book Chapter
Ahmad, S., Augusthus Nelson, L., & Swift, G. (2015). Two-dimensional experimental and numerical modelling of a soil-filled masonry arch. In Geotechnical Engineering for Infrastructure and Development: XVI European Conference on Soil Mechanics and Geotechnical Engineering. ICE Publishing

The ultimate load carrying capactiy of soil-filled masonry arches is significantly higher than that of bare masonry arches. The soil fill has a stabalising effect on the masonry arch, distributing the live load and providing passive resistance to def... Read More about Two-dimensional experimental and numerical modelling of a soil-filled masonry arch.

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.

Influence of the span rise ratio on the capacity of masonry arch bridges (2014)
Presentation / Conference
Donaghy, J., Wang, J., & Augusthus Nelson, L. (2014, July). Influence of the span rise ratio on the capacity of masonry arch bridges. Presented at 9th International Masonry Conference, Guimarães, Portugal

Current standards promote a holistic approach in appraisal of masonry arch bridges. This is derived from the aspect of a perfect arch with specific span rise ratios. The MEXE (Military Engineering Experimental Establishment) method used as first stag... Read More about Influence of the span rise ratio on the capacity of masonry arch bridges.

Discontinuous analysis of soil-arch interaction in masonry arch bridges (2014)
Presentation / Conference
Ahmad, S., Swift, G., & Augusthus Nelson, L. (2014, July). Discontinuous analysis of soil-arch interaction in masonry arch bridges. Presented at 9th International Masonry Conference, Guimarães, Portugal

Back-filled masonry arches behave in a discontinuous manner, where deformation is governed by interaction at joints and the soil-masonry interface. A discrete element approach is used in order to explicitly model the interactions at discontinuities.... Read More about Discontinuous analysis of soil-arch interaction in masonry arch bridges.

Residual capacity of damaged masonry arch bridges subjected to cyclic loading (2014)
Presentation / Conference
Augusthus Nelson, L., & Swift, G. (2014, July). Residual capacity of damaged masonry arch bridges subjected to cyclic loading. Presented at 9th International Masonry Conference, Guimarães, Portugal

In order to assess the stability of damaged arch structures, the residual capacity of damaged arch bridges needs to be established. This paper reports on two full-scale masonry arches, back-filled with crushed limestone, that were tested up to failur... Read More about Residual capacity of damaged masonry arch bridges subjected to cyclic loading.

Physical modelling of cyclically loaded masonry arch bridges (2013)
Presentation / Conference
Swift, G., Augusthus Nelson, L., Melbourne, C., & Gilbert, M. (2013, October). Physical modelling of cyclically loaded masonry arch bridges. Presented at 7th International Conference on Arch Bridges, Trogi-Split, Croatia

Experimental work involving large-scale physical models of backfilled masonry arch bridges is being undertaken to examine the behaviour of these structures under cyclic loading regimes. The aim of this research is to better understand the relationshi... Read More about Physical modelling of cyclically loaded masonry arch bridges.