Developing a smart repair technique towards buckling capacity enhancement for imperfect thin-walled structures. This project will contribute significantly to preventing thin-walled structural members with initial defects from abrupt or progressive buckling failure. The advanced technique developed will offer substantial national benefits, such as improved structural reliability and safety, enhanced structural performance and reduced costs in civil engineering.
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE130100133
Funder
Australian Research Council
Funding Amount
$400,000.00
Summary
National Facility for Physical Blast Simulation (NFPBS). Recent terrorist attacks employing large quantities of high explosives have prompted the international demand for experimental investigation of civil infrastructure response to shock wave loadings. The National Facility for Physical Blast Simulation (NFPBS) is one of only a few in the world that are suitable for conducting experimental research via a physically generated blast approach.
Seismic attenuation of structures through use of magnetorheological dampers. This project aims to improve understanding of the attenuating characteristics of the co-flowing of magnetised solid particles and fluid in a conduit subject to seismic waves generated by rapid ground movement. The distribution of magnetised solid particles in fluid plays an important role in the design of large-scale magnetorhelogical dampers for seismic conditions. These dampers promote the protection of historical str ....Seismic attenuation of structures through use of magnetorheological dampers. This project aims to improve understanding of the attenuating characteristics of the co-flowing of magnetised solid particles and fluid in a conduit subject to seismic waves generated by rapid ground movement. The distribution of magnetised solid particles in fluid plays an important role in the design of large-scale magnetorhelogical dampers for seismic conditions. These dampers promote the protection of historical structures and eliminate costly rebuilding of architectural structures. The project plans to perform experimental and numerical investigations to develop robust and accurate predictive models to improve understanding of the seismic attenuation of next-generation magnetorhelogical dampers, prevalent in semi-active control devices, and of the ability of such devices to suppress elevated structural vibrations.Read moreRead less
Buckling of Functionally Graded Multilayer Graphene Nanocomposites. This project aims to contribute to the development of novel lightweight structural members made of graphene nanocomposites with greatly enhanced resistance to abrupt or progressive buckling failure. Abrupt or progressive buckling failure under excessive compressive loads is a common and often catastrophic problem in engineering structures. The project intends to develop a functionally graded multilayer graphene nanocomposite str ....Buckling of Functionally Graded Multilayer Graphene Nanocomposites. This project aims to contribute to the development of novel lightweight structural members made of graphene nanocomposites with greatly enhanced resistance to abrupt or progressive buckling failure. Abrupt or progressive buckling failure under excessive compressive loads is a common and often catastrophic problem in engineering structures. The project intends to develop a functionally graded multilayer graphene nanocomposite structure and to conduct a combined theoretical, numerical and experimental investigation into its buckling and postbuckling behaviours, taking into account the effect of initial imperfection. The project aims to advance the knowledge base of the mechanical behaviour of lightweight nanocomposite structures with improved structural reliability.Read moreRead less
Optimal Source Control in Urban Water Cycle Management. Major opportunities exist to improve the management of the urban water cycle by better use of source control technology such as the use of rainwater tanks and water-sensitive design. This program will optimise the use of this technology at three scales, allotment, subdivision and regional, using genetic algorithms, parallel computing and shadow pricing. The aim is to minimise community lifecycle costs subject to sustainable use of ecosystem ....Optimal Source Control in Urban Water Cycle Management. Major opportunities exist to improve the management of the urban water cycle by better use of source control technology such as the use of rainwater tanks and water-sensitive design. This program will optimise the use of this technology at three scales, allotment, subdivision and regional, using genetic algorithms, parallel computing and shadow pricing. The aim is to minimise community lifecycle costs subject to sustainable use of ecosystems and maintenance of public health standards. The benefits include national savings of the order of $2 billion and significantly reduced demand on water supply and stormwater infrastructure and its supporting ecosystems.Read moreRead less
A Stochastic Spatial Rainfall Model for Engineering Risk Assessment. Current Australian hydrologic design practice is moving towards use of continuous simulation to more accurately evaluate the performance of the water-related infrastructure for managing floods and droughts. A major impediment is the inability to simulate the temporal and spatial variability of rainfall. This project aims to develop a stochastic rainfall model that will simulate long records of representative six-minute duration ....A Stochastic Spatial Rainfall Model for Engineering Risk Assessment. Current Australian hydrologic design practice is moving towards use of continuous simulation to more accurately evaluate the performance of the water-related infrastructure for managing floods and droughts. A major impediment is the inability to simulate the temporal and spatial variability of rainfall. This project aims to develop a stochastic rainfall model that will simulate long records of representative six-minute duration rainfall throughout the target region. The proposal introduces a three-level hierarchical model of space-time rainfall building on experience of a point rainfall model developed in previous ARC research. Practical issues dealing with data quality and validation will also be addressed.Read moreRead less
Modelling long-term hydrological persistence using hidden state Markov models. Long-term climatic persistence has a pronounced effect on engineering risk assessment of drought and flood severity. Accurate risk assessment is essential for economic design of water resource and flood defence infrastructure. A new, physically realistic, framework for stochastic modelling of persistence is developed, in which the probability distributions of hydrological variables depend on underlying climatic states ....Modelling long-term hydrological persistence using hidden state Markov models. Long-term climatic persistence has a pronounced effect on engineering risk assessment of drought and flood severity. Accurate risk assessment is essential for economic design of water resource and flood defence infrastructure. A new, physically realistic, framework for stochastic modelling of persistence is developed, in which the probability distributions of hydrological variables depend on underlying climatic states. These states are not directly observable, and occasionally change in a random manner. The research program, involving three PhD projects, will develop: estimation techniques and software using climate indices and multi-site data; a new approach to flood risk regionalisation; and seasonal rainfall forecasting methods.Read moreRead less
A stochastic space-time model of rainfall fields in large heterogeneous regions. The extreme temporal and spatial variability of Australia's rainfall affects the quantity and quality of its water resources, the productivity of its agricultural systems, and its aquatic and terrestrial ecosystems. Given the impact of extreme events such as droughts and floods and given the massive investment in water-related infrastructure, evaluation of such risks is an issue of national economic, social and envi ....A stochastic space-time model of rainfall fields in large heterogeneous regions. The extreme temporal and spatial variability of Australia's rainfall affects the quantity and quality of its water resources, the productivity of its agricultural systems, and its aquatic and terrestrial ecosystems. Given the impact of extreme events such as droughts and floods and given the massive investment in water-related infrastructure, evaluation of such risks is an issue of national economic, social and environmental significance. Stochastic space-time rainfall models enable rainfall and climatic variability to be quantified, simulated over arbitrarily long periods, and risks assessed. This research will provide software and the development of rainfall modelling frameworks for large river basins such as the Murray-Darling.Read moreRead less
Thermal Upheaval Buckling of Functionally Graded Pavement Slabs. Upheaval buckling or blowup of concrete pavements due to high environment temperature is a serious problem in transportation infrastructure which quite often leads to road failure or even traffic hazards. The proposed project presents a combined theoretical, numerical and experimental investigation on the effective enhancement of thermal buckling capacity of pavement slabs with or without initial imperfection by using light and gre ....Thermal Upheaval Buckling of Functionally Graded Pavement Slabs. Upheaval buckling or blowup of concrete pavements due to high environment temperature is a serious problem in transportation infrastructure which quite often leads to road failure or even traffic hazards. The proposed project presents a combined theoretical, numerical and experimental investigation on the effective enhancement of thermal buckling capacity of pavement slabs with or without initial imperfection by using light and green functionally graded concrete materials with reduced usage of plain Portland cements for less carbon dioxide emissions. The research outcomes will contribute significantly to the society by offering a novel environmental friendly pavement solution with greatly improved road safety.Read moreRead less
Combined strategies to extinguish underground coal fires and to extract geothermal energy. This project addresses two serious environmental issues that occur worldwide. Firstly, it aims to develop strategies to combat underground coal fires which are a serious environmental problem. It has been estimated that underground coal fires in China alone contribute 2 to 3 per cent of the total world output of carbon dioxide (CO2) from burning fossil fuel. Concentrations of CO2 and CO (carbon monoxide) o ....Combined strategies to extinguish underground coal fires and to extract geothermal energy. This project addresses two serious environmental issues that occur worldwide. Firstly, it aims to develop strategies to combat underground coal fires which are a serious environmental problem. It has been estimated that underground coal fires in China alone contribute 2 to 3 per cent of the total world output of carbon dioxide (CO2) from burning fossil fuel. Concentrations of CO2 and CO (carbon monoxide) of up to 2200 ppm and 1000 ppm, respectively, have been measured in gases produced by underground coal fires. Secondly, the project is a proof of concept to validate the feasibility of production of geothermal energy from burning coal seams. This aspect has the potential to harvest large amounts of geothermal energy which is currently wasted.Read moreRead less