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Friction and contact in soil-structure-interaction. Frictional contact, which occurs at soil-structure interfaces, has a major influence on the behaviour of many civil engineering structures such as building foundations and soil anchor systems. To better understand this phenomenon, new theoretical models and solution algorithms are needed to simulate soil-structure interaction. This project aims to develop these models and algorithms. Its outcomes will lead to improved prediction methods and bet ....Friction and contact in soil-structure-interaction. Frictional contact, which occurs at soil-structure interfaces, has a major influence on the behaviour of many civil engineering structures such as building foundations and soil anchor systems. To better understand this phenomenon, new theoretical models and solution algorithms are needed to simulate soil-structure interaction. This project aims to develop these models and algorithms. Its outcomes will lead to improved prediction methods and better geotechnical design strategies.Read moreRead less
Influence of Spatial Variability on the Design and Performance of Pile Foundations. Currently, no model is available that incorporates the spatial variability of soil properties into the design and analysis of pile foundations. Furthermore, only basic rules-of-thumb are available to assist in determining the scope of appropriate site investigations for piles, and limited data are available for the LRFD of piles. The new and unique finite element model, site investigation guidelines and load re ....Influence of Spatial Variability on the Design and Performance of Pile Foundations. Currently, no model is available that incorporates the spatial variability of soil properties into the design and analysis of pile foundations. Furthermore, only basic rules-of-thumb are available to assist in determining the scope of appropriate site investigations for piles, and limited data are available for the LRFD of piles. The new and unique finite element model, site investigation guidelines and load resistance factors will reduce the over-design and uncertainty associated with pile design, which will lead to more reliable pile foundations and reduced construction cost overruns and delays. Conservatively, it is estimated that this research will result in savings in excess of $10 million per year, in Australia alone.Read moreRead less
Two-scale modelling of geomaterials. Engineering structures such as buildings, highways, bridges, tunnels, dams and offshore oil platforms are all built on or in soils and rocks. The ability to predict the response of these materials under various loading conditions is therefore of major importance in civil engineering design. The traditional method in modelling these materials requires extensive and often costly experimental data. The proposed micro-macro modelling approach will enable us to ta ....Two-scale modelling of geomaterials. Engineering structures such as buildings, highways, bridges, tunnels, dams and offshore oil platforms are all built on or in soils and rocks. The ability to predict the response of these materials under various loading conditions is therefore of major importance in civil engineering design. The traditional method in modelling these materials requires extensive and often costly experimental data. The proposed micro-macro modelling approach will enable us to take advantage of the fast-growing computing power to release some of the pressure in geotechnical testing. It will also improve the quality of engineering analysis and hence leads to more efficient and effective engineering design.Read moreRead less
Progressive liquefaction within marine sediments: comparison between geo-centrifuge modelling, full-scale wave tank tests and numerical modelling. The evaluation of wave-induced liquefaction within the marine sediment is particularly important for coastal and geotechnical engineers involved in the design of foundation around coastal structures. The proposed study will integrate the existing knowledge from the aspects of coastal and geotechnical engineering with that of overseas experts to provid ....Progressive liquefaction within marine sediments: comparison between geo-centrifuge modelling, full-scale wave tank tests and numerical modelling. The evaluation of wave-induced liquefaction within the marine sediment is particularly important for coastal and geotechnical engineers involved in the design of foundation around coastal structures. The proposed study will integrate the existing knowledge from the aspects of coastal and geotechnical engineering with that of overseas experts to provide coastal engineers with an effective tool for the design of foundations around marine structures. It will also assist in reducing the risk of potential environmental damage caused by failure of marine structures.Read moreRead less
Application of flow-round penetrometers for characterising soft sediments. Soft sediments present unique challenges in geotechnical engineering due to their sensitivity to disturbance during sampling. Strength measurement therefore relies on field tests, and novel penetrometers that force soil to flow around the probe have the potential for significantly improved accuracy compared with conventional cone penetrometers. The project aims to establish a definitive framework for interpreting result ....Application of flow-round penetrometers for characterising soft sediments. Soft sediments present unique challenges in geotechnical engineering due to their sensitivity to disturbance during sampling. Strength measurement therefore relies on field tests, and novel penetrometers that force soil to flow around the probe have the potential for significantly improved accuracy compared with conventional cone penetrometers. The project aims to establish a definitive framework for interpreting results of field tests using flow-round penetrometers, through careful comparison of laboratory and field strength measurements. Applications of the work range from characterising deepwater sediments for offshore developments, to monitoring the strength of pastes in the mining and materials handling industries.Read moreRead less
Physical modelling of on-bottom pipelines and offshore anchoring systems. The collaborative research programme will consist of physical modelling of suction caissons, piles and pipeline sections in order to advance the geotechnical design of deepwater facilities for offshore hydrocarbon production. The collaboration will underpin new technologies, such as steel catenary risers and suction caissons for deepwater anchoring, providing benchmark data for the validation of analysis tools. Benefits al ....Physical modelling of on-bottom pipelines and offshore anchoring systems. The collaborative research programme will consist of physical modelling of suction caissons, piles and pipeline sections in order to advance the geotechnical design of deepwater facilities for offshore hydrocarbon production. The collaboration will underpin new technologies, such as steel catenary risers and suction caissons for deepwater anchoring, providing benchmark data for the validation of analysis tools. Benefits also include the exchange of recent technical advances between geotechnical centrifuge facilities in Australia, France and the UK, all of whom are active in modelling offshore foundation systems, ensuring that Australian research remains at the forefront of world best-practice.Read moreRead less
Development of cyclic loading models for application in offshore geotechnics. The response of foundations for offshore structures to repetitive (cyclic) loads is a critical but still inadequately understood area of offshore geotechnics, with designs still usually based on simple modifications to monotonic loading conditions. In this project, a definitive framework for modelling cyclic behaviour will be established. Using this new approach, numerical models will be developed to address problems a ....Development of cyclic loading models for application in offshore geotechnics. The response of foundations for offshore structures to repetitive (cyclic) loads is a critical but still inadequately understood area of offshore geotechnics, with designs still usually based on simple modifications to monotonic loading conditions. In this project, a definitive framework for modelling cyclic behaviour will be established. Using this new approach, numerical models will be developed to address problems at all scales from fundamental constitutive behaviour of soils to macroscopic models for large foundation systems. Their application to offshore design problems (for renewable energy as well as traditional oil and gas applications) will be assessed. Recommendations to current international guidelines will also be made.Read moreRead less
Modelling and simulation of emergent behaviour in particulate assemblies under terrestrial and microgravity conditions: a focus on force propagation. Systems and processes involving particulate matter are complex, and due to inadequate understanding and modelling capabilities, rarely reach more than 60% of the design capacity. Given the prominence of these materials in Australia's leading export industries, the potential economic and social impact of this research program is significant. For exa ....Modelling and simulation of emergent behaviour in particulate assemblies under terrestrial and microgravity conditions: a focus on force propagation. Systems and processes involving particulate matter are complex, and due to inadequate understanding and modelling capabilities, rarely reach more than 60% of the design capacity. Given the prominence of these materials in Australia's leading export industries, the potential economic and social impact of this research program is significant. For example, Australia holds the largest known resources of iron ore with annual exports exceeding $3.8 billion; annual wheat exports exceed $3.4 billion and 90% of Australia's sealed roads (granular paved) cost $1 billion per year to maintain. This research will advance knowledge of fundamental behaviour and deliver predictive tools to control and optimise processes involving particulate matter.Read moreRead less
Contaminant Transport in Marine Sediment. Sediments in bays and estuaries are often contaminated. The inorganic contaminants in sediments can be released back into the water body through mass transfer processes. The mass transfer rate is largely controlled by the wave-driven seepage flux across the seabed. Quantification of this flux is thus a key factor in modelling water quality of coastal water bodies. This project aims to: (1) develop models forwave-induced seepage flux within sediments and ....Contaminant Transport in Marine Sediment. Sediments in bays and estuaries are often contaminated. The inorganic contaminants in sediments can be released back into the water body through mass transfer processes. The mass transfer rate is largely controlled by the wave-driven seepage flux across the seabed. Quantification of this flux is thus a key factor in modelling water quality of coastal water bodies. This project aims to: (1) develop models forwave-induced seepage flux within sediments and contaminant transport; and (2) establish the link between seepage flux and contaminant transport. Outcomes of the proposed research will enhance the understanding of the mechanism of contaminant transport in marine sediment.Read moreRead less
Risk assessment modelling for corrosion affected concrete infrastructure. Aging and deterioration of physical infrastructure is a global problem that has caused widespread premature structural failures and significantly reduced its designed service life. This is an increasing problem also for Australia. For reinforced concrete infrastructure, the corrosion of the reinforcing steel within the surrounding concrete is the most significant factor. The aim of the project is to improve understanding o ....Risk assessment modelling for corrosion affected concrete infrastructure. Aging and deterioration of physical infrastructure is a global problem that has caused widespread premature structural failures and significantly reduced its designed service life. This is an increasing problem also for Australia. For reinforced concrete infrastructure, the corrosion of the reinforcing steel within the surrounding concrete is the most significant factor. The aim of the project is to improve understanding of the factors that influence corrosion mechanics in marine environments, to re-examine corrosion process in practical concrete structures and to develop a model for corrosion to enable prediction of structural deterioration and improved risk assessment.Read moreRead less