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All Outputs (12)

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.

An experimental study of concrete resistivity and the effects of electrode configuration and current frequency on measurement (2018)
Presentation / Conference
Oleiwi, H., Wang, Y., Xiang, N., Augusthus Nelson, L., Chen, X., & Shabalin, I. (2018, July). An experimental study of concrete resistivity and the effects of electrode configuration and current frequency on measurement. Presented at Sixth International Conference on Durability of Concrete Structures, University of Leeds, UK

Electrical resistivity, a measurable parameter of the state of concrete, plays an important role in the assessment of reinforced concrete structures. An experimental study using two-electrode method has been conducted to evaluate the resistivity of P... Read More about An experimental study of concrete resistivity and the effects of electrode configuration and current frequency on measurement.

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.

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.

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.

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.

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.