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Full-Text Articles in Engineering
Limit States Design Of Railway Concrete Sleepers, Sakdirat Kaewunruen, Alexander Remennikov, Martin H. Murray
Limit States Design Of Railway Concrete Sleepers, Sakdirat Kaewunruen, Alexander Remennikov, Martin H. Murray
Faculty of Engineering - Papers (Archive)
The recently updated information has raised a concern in not only the existing costineffective design method but also the unrealistic analysis mode of railroad prestressed concrete sleepers. Because of the deficient knowledge in the past, railway civil engineers have been mostly aware of the over conservative design methods for structural components in any railway track, which rely on allowable stresses and material strength reductions. Based on a number of proven experiments and field data, it is believed that the concrete sleepers complied with the allowable stress concept possess the unduly untapped fracture toughness. A collaborative research run by the Australian …
A New Method Of Filtration Design On Rail Track Subballast, Laricar Dominic. O Trani, Buddhima Indraratna
A New Method Of Filtration Design On Rail Track Subballast, Laricar Dominic. O Trani, Buddhima Indraratna
Faculty of Engineering - Papers (Archive)
Apart from being a protection layer against subgrade attrition, the subballast of ballasted rail tracks is designed mainly to act as a stress dissipation layer or more commonly known as a capping layer. When considered as a filtration layer, subballast would prove to be inadequate due to the use of design criteria that are primarily based on steady seepage loading common in embankment dams. The seepage hydraulics through porous media would have to be influenced by the cyclic mechanical loading generated by the passing trains. Under the influence of cyclic train loading, subballast particles rearrange and attempt to attain a …
Frontier Technologies In Design And Construction For Sustainable Transport Infrastructure, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Cholachat Rujikiatkamjorn
Frontier Technologies In Design And Construction For Sustainable Transport Infrastructure, Buddhima Indraratna, Sanjay Shrawan Nimbalkar, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
Railways are expected to be one of the main modes of future transport in rapidly developing countries with high population densities, including Sri Lanka. In spite of recent advances in rail track geotechnology, ballasted tracks progressively degrade under heavy cyclic and impact loading. Field studies often provide significant knowledge to better understand track performance and to extend the current state-of-the-art in design. Therefore, comprehensive field trials were carried out on two instrumented rail tracks in Bulli and in Singleton, New South Wales, Australia. In these studies, several track sections were reinforced with different types of geosynthetics placed beneath the ballast …
State-Of-The-Art Design Aspects Of Ballasted Rail Tracks Incorporating Particle Breakage, Fouling, And The Benefits Of Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Michael Martin, Tim Neville, Cholachat Rujikiatkamjorn
State-Of-The-Art Design Aspects Of Ballasted Rail Tracks Incorporating Particle Breakage, Fouling, And The Benefits Of Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Michael Martin, Tim Neville, Cholachat Rujikiatkamjorn
Faculty of Engineering - Papers (Archive)
No abstract provided.
Design Of Water Holding Bulkheads For Coal Mines, Verne Mutton, Alexander Remennikov
Design Of Water Holding Bulkheads For Coal Mines, Verne Mutton, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
Water control has been and remains a fundamentally important aspect of underground coal mine design and operation worldwide. Mining in the vicinity of large bodies of water, below a worked out coal seam or under confined aquifer or abandoned water logged workings is always fraught with the possibility of the danger of inundation. Inrush control is now part the Fatal Hazard Protocols which is a risk based process in all operations. In modern Australian underground coal mines, in which panel layouts have been extended and production rates are approaching 10 Mtpa, there is much focus on the control of water …
Observing Cultural Interactions In Engineering Design,, Timothy J. Mccarthy, Anne Gardner, Thomas L. Goldfinch, Catherine A. Layton, Giles Thomas, Alan Henderson
Observing Cultural Interactions In Engineering Design,, Timothy J. Mccarthy, Anne Gardner, Thomas L. Goldfinch, Catherine A. Layton, Giles Thomas, Alan Henderson
Faculty of Engineering - Papers (Archive)
The University of Wollongong and partner institutions UTAS, UTS, and QUThave engaged in an ALTC funded project to address issues of intercultural competence inengineering. As a major component of this project, observational research techniquesare being employed to assess the current state of intercultural competence in first andsecond year engineering students. The research described in this paper is a processemployed by the authors to observe cultural interactions between students in first orsecond year design subjects. The process involves simple video recordings of the groups¿interactions over the course of a normal project team meeting, which are then coded andanalysed using NVivo 8. …
Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron
Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron
Faculty of Engineering - Papers (Archive)
Performance based design of bridges for earthquake resistance is still not explicitly used in design. However, most codes specify a level of performance for bridges under various earthquake inputs. In principle, design rules suggested in the code should meet stipulated performance criteria. However, it has been highlighted in the past that design rules are not directly related with stipulated performance criteria. After the presentation of performance criteria and their relation with post-earthquake functional requirements, the article examines the case of the Canadian Bridge Design Code (CAN/CSA-S6-06). Performance of bridges designed with this code is predicted and compared to expected levels. …
Yield Curvature For Seismic Design Of Circular Reinforced Concrete Columns, M Neaz Sheikh, H. H. Tsang, T. J. Mccarthy, N.T.K Lam
Yield Curvature For Seismic Design Of Circular Reinforced Concrete Columns, M Neaz Sheikh, H. H. Tsang, T. J. Mccarthy, N.T.K Lam
Faculty of Engineering - Papers (Archive)
Significant research efforts have been devoted in recent years to the development of displacement-based seismic assessment and design methodology, recognising the shortcomings of traditional, code-specified force-based procedures. Recent advances in direct displacement-based seismic design of columns rely on the estimates of yield curvature for determining seismic design forces to satisfy the specified seismic performance levels. This paper presents simple expressions for estimating the effective yield curvature for normal- and high-strength circular reinforced concrete columns based on moment–curvature analyses of a large number of column sections. Such expressions can be programmed into spreadsheet format and can be used for the direct …
Design And Simulation Of Roadway Development Operations To Improve Productivity, Soumya Raghavendra Rao, Christopher D. Cook, Ernest Y. Baafi, R Porteous
Design And Simulation Of Roadway Development Operations To Improve Productivity, Soumya Raghavendra Rao, Christopher D. Cook, Ernest Y. Baafi, R Porteous
Faculty of Engineering - Papers (Archive)
A typical Australian 3–5 Mt/year longwall requires 9 to 15 km of roadway to be developed every year (G. Lewis and G. Gibson: Proc. 13th Austr. Tunnelling Conf., Melbourne, Australia, May 2008, ATS, 317–326.). One of the major challenges faced by the Australian longwall mining industry is that roadway development has been unable to keep pace with improvements in longwall extraction rates. This has affected the profitability, viability and future of underground coal mines (M. Kelly: 'Coordination of roadway development strategy', ACARP report no. C5013, ACARP, Brisbane, Australia, 1997.). Gibson (G. Gibson: 'Australian roadway development– current practices', ACARP report no. …
Design And Implementation Of Edge Detection Algorithm In Dspic Embedded Processor, Prashan Premaratne, Sabooh Ajaz, Ravi Monaragala, Nalin Bandara, Malin Premaratne
Design And Implementation Of Edge Detection Algorithm In Dspic Embedded Processor, Prashan Premaratne, Sabooh Ajaz, Ravi Monaragala, Nalin Bandara, Malin Premaratne
Faculty of Engineering - Papers (Archive)
The research presented here is an attempt to use a very basic, low cost and non-specialized microcontroller for image processing tasks. The applications emanating from such an attempt will result in inexpensive face detection, intelligent motion sensors to low cost vehicle counting systems. We have been able to develop a system based on Microchip dsPIC microcontroller that implements edge detection of still images. Hardware-based signal processors such as Texas Instrument DSP (Digital Signal Processing) or Field Gate Arrays (FPGA) are generally an expensive solution for image processing applications. On the other hand a conventional 8-bit microcontroller doesn’t have enough capability …
A Particle Swarm Optimisation Approach To Reinforced Concrete Beam Design According To As3600, Timothy J. Mccarthy, Sean Mccluskey
A Particle Swarm Optimisation Approach To Reinforced Concrete Beam Design According To As3600, Timothy J. Mccarthy, Sean Mccluskey
Faculty of Engineering - Papers (Archive)
A program has been developed to utilise the Particle Swarm Optimisation Algorithm for the cost optimum design of reinforced concrete beams. Multiple constraints according to Australian Standard 3600 have been implemented along with costing information. A series of tests where conducted to investigate the effect of different parameters of the particle swarm algorithm and some refinement of these parameters was conducted. The value penalty coefficients had a significant effect on the results, causing non-convergence when very large penalty coefficients where used, and convergence on non-viable results when very small penalty coefficients where used.
Design Procedure For Vertical Drains Considering A Linear Variation Of Lateral Permeability Within The Smear Zone, Cholachat Rujikiatkamjorn, Buddhima Indraratna
Design Procedure For Vertical Drains Considering A Linear Variation Of Lateral Permeability Within The Smear Zone, Cholachat Rujikiatkamjorn, Buddhima Indraratna
Faculty of Engineering - Papers (Archive)
A system of vertical drains with surcharge preloading is an effective method for promoting radial drainage and accelerated soil consolidation. This study presents a procedure for the design of vertical drains that significantly extends the previous technique proposed by the authors to include: (i) a linear reduction of lateral permeability in the smear zone, (ii) the effect of overlapping smear zones in a closely spaced drain network, and (iii) the gain in undrained shear strength due to consolidation. Design examples are provided for both single stage and multi-stage embankment construction demonstrating the convenient use of the proposed solutions in practical …
Design And Development Of A 3-Phase Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Frank Darmann
Design And Development Of A 3-Phase Saturated Core High Temperature Superconducting Fault Current Limiter, Jeffrey W. Moscrop, Frank Darmann
Faculty of Engineering - Papers (Archive)
The occurrence of fault currents and system sensitivity to fault currents are both increasing in modern power systems. Along with extensive damage to network hardware, considerable consumer losses (due to network unavailability) can result from fault current events. One device that is designed to reduce the impact of fault currents and increase network availability is the fault current limiter (FCL). This paper describes the design and development of a 3-phase saturated core high temperature superconducting (HTS) FCL. This particular type of FCL exhibits negligible power losses during the un-faulted state and also provides instantaneous reaction and recovery during fault events. …
A Method To Design Transmission Resonances Through Subwavelength Apertures Based On Designed Surface Plasmons, Jinsong Liu, Lan Ding, Kejia Wang, Jianquan Yao
A Method To Design Transmission Resonances Through Subwavelength Apertures Based On Designed Surface Plasmons, Jinsong Liu, Lan Ding, Kejia Wang, Jianquan Yao
Faculty of Engineering - Papers (Archive)
A plasmonic metamaterial is proposed for which an array of subwavelength apertures is pierced into a metallic foil whose one flat surface has been made with periodic rectangle holes of finite depth. Designed surface plasmons sustained by the holes are explored when the size and spacing of the holes are much smaller than those of the apertures. The transmission property of electromagnetic waves through the metamaterials is analyzed. Results show that the designed surface plasmons characterized by the holes could support the transmission resonances of the incident wave passing through the subwavelength apertures, and that the peak transmission wavelengths could …
Validated Computer Simulation Modelling For Complete Conveyor Transfer Design, David B. Hastie, Andrew P. Grima, Peter W. Wypych
Validated Computer Simulation Modelling For Complete Conveyor Transfer Design, David B. Hastie, Andrew P. Grima, Peter W. Wypych
Faculty of Engineering - Papers (Archive)
This paper presents the chute flow analysis for a granular cohesionless material in a hood and spoon style transfer chute and bench scale testing methods to calculate the coefficient of restitution, particle rotation restraint and the coefficient of friction between particles of granular material. The experimental chute flow investigations were performed on a conveyor transfer research facility located at the University of Wollongong, using high-speed video to capture the granular flow and subsequently analysed with the Image Pro Plus software package. The bench scale tests were analysed to determine the input parameters for the DEM simulations of the trajectories and …
Optimal Target Performance For Cost-Effective Seismic Design Of Bridges, M Neaz Sheikh, Frederic Legeron
Optimal Target Performance For Cost-Effective Seismic Design Of Bridges, M Neaz Sheikh, Frederic Legeron
Faculty of Engineering - Papers (Archive)
A systematic approach is proposed for evaluating the cost-effectiveness of existing bridge design codes based on expected lifecycle cost. In the life cycle cost formulation, costs of construction, damage cost, road user cost, as well as discount cost over the design life of the bridge are considered. The optimal performance is selected on the basis of minimum life cycle cost. The performance of a typical two-span bridge designed according to a current code provision for different earthquake ground motion levels is predicted and optimal target performance is selected based on life cycle cost with different assumptions of user cost. It …
Estimation Of Yield Curvature For Direct Displacement-Based Seismic Design Of Rc Columns, M Neaz Sheikh, Hing-Ho Tsang, Nelson Lam
Estimation Of Yield Curvature For Direct Displacement-Based Seismic Design Of Rc Columns, M Neaz Sheikh, Hing-Ho Tsang, Nelson Lam
Faculty of Engineering - Papers (Archive)
Significant research efforts have been devoted in recent years to the development of displacement-based seismic design methodologies, recognizing the shortcomings of traditional, code-specified force-based design procedures. Recent advances in direct displacement-based seismic design of columns rely on the estimates of yield curvature for the determination of seismic design forces to satisfy the specified seismic performance levels. This paper presents simple expressions for estimating the effective yield curvature for normal- and high-strength circular reinforced concrete (RC) columns based on moment-curvature analyses of a large number of column sections. Such expressions can be programmed into the spreadsheet format and can be used …
Design Of Silos For Flow And Strength - The Various Contributors Must Communicate, Peter C. Arnold
Design Of Silos For Flow And Strength - The Various Contributors Must Communicate, Peter C. Arnold
Faculty of Engineering - Papers (Archive)
Too often in the design of silo systems for the storage and handling of bulk solids those involved in the various components of the design process do not communicate. The chemical engineers often have a range of desired outcomes that differ from those of the mechanical engineers and the mechanical and structural engineers are often not aiming for the same range of outcomes. Even if all the designers communicate well the overall result may disappoint if the project manager allows significant (but sometimes subtle) design variations during construction. The result can be a system that does not perform well. Had …
Modelling And Design Of Complete Conveyor Transfers, David B. Hastie, Andrew P. Grima, Peter W. Wypych
Modelling And Design Of Complete Conveyor Transfers, David B. Hastie, Andrew P. Grima, Peter W. Wypych
Faculty of Engineering - Papers (Archive)
This paper presents the chute flow analysis for a granular cohesionless material in a hood and spoon style transfer chute and bench scale testing methods to calculate the coefficient of restitution, particle rotation restraint and the coefficient of friction between particles of granular material. The experimental chute flow investigations were performed on a conveyor transfer research facility located at the University of Wollongong, using high-speed video to capture the granular flow and subsequently analysed with the Image Pro Plus software package. The bench scale tests were analysed to determine the input parameters for the DEM simulations of the trajectories and …
Constriction-Based Retention Criterion For Granular Filter Design, Buddhima Indraratna, A. K. Raut, H. Khabbaz
Constriction-Based Retention Criterion For Granular Filter Design, Buddhima Indraratna, A. K. Raut, H. Khabbaz
Faculty of Engineering - Papers (Archive)
The filter design criteria in practice are currently based on laboratory tests that were carried out on uniform base soil and filter materials. These criteria mostly involve specific particle size ratios, where the system of base soil and filter is represented by some characteristic particle sizes. Consequently, these criteria have limitations when applied to nonuniform materials. In filters, it is the constriction size rather than the particle size that affects filtration. In this paper, a mathematical procedure to determine the controlling constriction size is introduced, and subsequently, a constriction-based retention criterion for granular filters is presented. The model also incorporates …
Some Observations On The Design Data Provided By Three Well Known Devices For Measuring Flow Properties Of Bulk Solids, Wendy G. Halford, Peter C. Arnold
Some Observations On The Design Data Provided By Three Well Known Devices For Measuring Flow Properties Of Bulk Solids, Wendy G. Halford, Peter C. Arnold
Faculty of Engineering - Papers (Archive)
This paper examines the flow properties of three powders determined using the traditional Jenike Direct Shear Tester and the Peschl Rotational Split Level (RSL) Shear Tester. Both instantaneous yield loci and wall yield loci measurements are compared.
Design And Analysis Of General And Travelling Dielectrophoresis, T. Kinkeldei, W.H Li
Design And Analysis Of General And Travelling Dielectrophoresis, T. Kinkeldei, W.H Li
Faculty of Engineering - Papers (Archive)
This paper presents the simulation of general and travelling dielectrophoretic forces, as well as the movement of the particles in a sandwich structure micro-device. The electrode geometry of the micro device used for simulation is an interdigitated bar electrode. The simulation method used to solve the equations is based on the least square finite difference method (LSFD). The simulation first calculates all forces acting at any place in the chamber, with these forces the trajectory of a particle can now be proposed. All of the particles parameters like radius, voltage, initial height, etc can easily be changed and the simulation …
Strategic Design Of Service Orientated Web-Based Supply Chain Infrastructure, Leone J. Dunn, Peter R. Gibson
Strategic Design Of Service Orientated Web-Based Supply Chain Infrastructure, Leone J. Dunn, Peter R. Gibson
Faculty of Engineering - Papers (Archive)
The traditional 'make and sell' attitude of industrial manufacturing organisations has now almost entirely given way to customer orientated 'sense and respond' service philosophies to the extent where this has become a major competitive key success factor in a global manufacturing industry. In order to become service orientated, manufacturing industry is increasingly dependent on efficient and effective supply relationships. This trend is compounded by needs for waste avoidance, minimal inventory, cost efficiency and appropriate service to the customer. This paper considers the strategic opportunities for large engineering project firms that have identified a need to establish advantages over their competitors …
Multidisciplinary Design In Virtual Worlds, M A. Rosenman, G Smith, L Ding, D Marchant, M L. Maher
Multidisciplinary Design In Virtual Worlds, M A. Rosenman, G Smith, L Ding, D Marchant, M L. Maher
Faculty of Engineering - Papers (Archive)
Large design projects, such as those in the AEC domain, involve collaboration among a number of design disciplines, often in separate locations. With the increase in CAD usage in design offices, there has been an increase in the interest in collaboration using the electronic medium, both synchronously and asynchronously. The use of a single shared database representing a single model of a building has been widely put forward but this paper argues that this does not take into account the different representations required by each discipline. This paper puts forward an environment which provides real-time multi-user collaboration in a 3D …
Gene Network Analysis And Design, Matthew J. Berryman, Andrew Allison, Derek Abbott
Gene Network Analysis And Design, Matthew J. Berryman, Andrew Allison, Derek Abbott
Faculty of Engineering - Papers (Archive)
Gene networks are composed of many different interacting genes and gene products (RNAs and proteins). They can be thought of as switching regions in n-dimensional space or as mass-balanced signaling networks. Both approaches allow for describing gene networks with the limited quantitative or even qualitative data available. We show how these approaches can be used in modeling the apoptosis gene network that has a vital role in tumor development. The open question is whether engineering changes to this network could be used as a possible cancer treatment.
A Cost Effective Sensor Design For Granular Flow Visualization, Anton Fuchs, Peter W. Wypych, David B. Hastie, Ian Frew, David M. Cook, B. Bradstatter
A Cost Effective Sensor Design For Granular Flow Visualization, Anton Fuchs, Peter W. Wypych, David B. Hastie, Ian Frew, David M. Cook, B. Bradstatter
Faculty of Engineering - Papers (Archive)
This paper presents a cost-effective sensor design based on an arrangement of light dependent resistors (LDRs) to determine the particle flow velocity and the particle concentration of granular material flow. The sensor is designed for both dense phase and dilute phase flow and can be applied wherever a transparent sightglass is used in material conveying. The measurement setup and its applicability for industrial conveying processes are discussed and measurement results utilising plastic pellets are presented.
Building Vulnerability Design Against Terrorist Attacks, Alexander Remennikov, D. Carolan
Building Vulnerability Design Against Terrorist Attacks, Alexander Remennikov, D. Carolan
Faculty of Engineering - Papers (Archive)
Some of the concepts that can help structural engineers and building owners mitigate the threat of hazards associated with terrorist attacks on new and existing buildings are discussed. The state-of-the-art methods to enhance protection of the building by incorporating low-cost measures at the early stages of building design are highlighted.
Analysis And Design Of Double-Sided High-Rise Steel Pallet Rack Frames, Lip H. Teh, Gregory J. Hancock, Murray J. Clarke
Analysis And Design Of Double-Sided High-Rise Steel Pallet Rack Frames, Lip H. Teh, Gregory J. Hancock, Murray J. Clarke
Faculty of Engineering - Papers (Archive)
In routine design of steel storage rack frames, it is far more common to perform two dimensional (2D) rather than three dimensional (3D) linear buckling analyses. In this paper, it is demonstrated that the global buckling behavior of high-rise steel storage rack frames may not be revealed by 2D buckling analyses as 3D interaction modes are involved. It is shown that the monosymmetric upright columns of a high-rise rack frame fail in a flexural–torsional mode due to the shear-center eccentricity of the sections, and that the 3D frame buckling analysis is more reliable in determining the critical members of a …
Cubic Beam Elements In Practical Analysis And Design Of Steel Frames, Lip H. Teh
Cubic Beam Elements In Practical Analysis And Design Of Steel Frames, Lip H. Teh
Faculty of Engineering - Papers (Archive)
This paper discusses various issues in the use of cubic beam elements for computer structural analysis/design of steel frames. It is pointed out that the concern expressed in recent literature regarding the number of cubic elements required to model a steel member is not justified, and that the inaccuracy of one cubic element in Euler buckling analysis of a simply supported column is largely irrelevant to the second-order elastic analysis/design or advanced analysis of steel frames. The sources of inaccuracy of the cubic element are elucidated. It is also explained that the plastic-zone analysis method is not so inefficient as …
The Concept And Design Of Programmable Array Manipulator, Philip Ciufo, Fazel Naghdy, Christopher D. Cook, Pak Chung Wong
The Concept And Design Of Programmable Array Manipulator, Philip Ciufo, Fazel Naghdy, Christopher D. Cook, Pak Chung Wong
Faculty of Engineering - Papers (Archive)
This paper is the complement to the Programmable Array Manipulator, Part 1. It presents an overview of the R & D program associated with the development of the PAM. The aspects of the control scheme are given as are some experimental results showing the preliminary capabilities of the PAM.