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Siripun, Komsun. "Characterisations of base course materials in Western Australia pavements." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/960.
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Western Australia (WA) has a road network of approximately 177,700 km, including a 17,800 km stage highway system (Main Roads Western Australia 2009). This infrastructure supports a population of only about two million, and road funds always have to be carefully considered when allocated to highway authorities or other organisations. Pavement design is a process intended to find the most economical combination of suitable materials and layer thicknesses for construction. The pavement must have a carefully-specified unbound granular base to further reduce construction costs, and must be surfaced with an approximately 30 mm asphalt surface in WA. High quality aggregates are therefore required for the base course layer of a pavement because of its proximity to the road surface. Traffic loads on the road surface result in high stress levels on the base course layer. Consequently, Hydrated Cement Treated Crushed Rock Base (HCTCRB) was developed.Current pavement analysis and design in WA is thought to be sub-standard. A number of highways and roads in WA are exhibiting extensive surface damage as a result of the increasing numbers of vehicles in use. Since pavement analysis and design in WA relies predominantly on empirical design, experience and basic experimentation, explanations for the damage occurring under present conditions are difficult to determine and assess.In most areas of the USA and Europe, pavement design and analysis has entered a new era with mechanistic design replacing empirical design. Unlike the empirical approach, a mechanistic approach seeks to explain pavement characteristics under real operational pavement conditions (loads, material properties of the pavement structure, and environments), and is based on design parameters derived from sophisticated tests which can simulate real pavement conditions in the test protocol (WSDOT 2008). The mechanistic approach to pavement design produces more relevant and useful results and these procedures, along with linear elastic analysis, were introduced into Australia by the 1987 NAASRA Guide (NAASRA 1987), of which the revised version became the AUSTROADS Guide (Austroads 2004) to the Structural Design of Road Pavements. AUSTROADS published a National Pavement Research Strategy which has been the keystone for the national co-ordination of pavement research, both within government and industry.Adaptation of the Cement Modified Crushed Rock Base concept has brought about an excellent road base material for Western Australia (WA) by the addition of a small amount of cement (1-2% by mass) to a fresh crushed rock material. The mix is stockpiled for a hydration period, and after that retreated before construction, unlike the traditional concept for cement modified/stabilised materials. This material is usually called Hydrated Cement Treated Crushed Rock Base (HCTCRB), a name established by Western Australia Mainroads (MRWA). More than 250,000 tonnes of HCTCRB has been used at a cost in excess of $10 million over the last eight years.Recently, as a result of early damage on new highways and roads in WA, MRWA and its contractors and organisations have attempted to identify the cause of this damage. HCTCRB, which is currently the best option for base course materials in WA, and Crushed Road Base (CRB), the original road base material, need to be re-examined to overcome the shortcomings in terms of analysis, design, and application. All of the factors involved in HCTCRB and CRB for today’s pavement conditions have been extrapolated far beyond the bounds of the original data, and current experience shows these require detailed re-investigation.This research aimed to study on the characteristics of CRB and HCTCRB and to determine reliable mathematical material models for the improvement in the current pavement design criteria. This study also investigated both elastic and plastic behaviour of CRB and HCTCRB. In this study, there were two relevant factors of both pavement materials which are considered in order to fulfil a lack of understanding in realistic conditions in pavements of the current pavement design. 1) The material strength which indicates the limitation and stability of pavement materials under traffic loads. This study employed the Mohr-Coulomb failure envelope to define the limitation of material implementation and also brought in the resilient modulus of materials to be the significant input parameter for multilayer finite element analysis to characterise the stress distribution in pavements. 2) The pavement failure of long term road performance relating to the design life of pavements. The permanent deformation behaviour and the shakedown concept under various stress conditions, simulated from repeated load triaxial (RLT) tests, therefore, were taken into account to investigate such long-term performance of HCTCRB and CRB and then the implementation of the findings was made to the current pavement analysis and design. Furthermore, more reliable mathematic models of base course materials for short and long term performance during their service life were established based on the laboratory test results of this study.
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Alba, Jorge Luis. "Laboratory determination of resilient modulus of granular materials for flexible pavement design." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/21274.
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Goede, William Gunter. "Pervious concrete investigation into structural performance and evaluation of the applicability of existing thickness design methods /." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/w_goede_112409.pdf.
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Thesis (M.S. in civil engineering)--Washington State University, December 2009.Title from PDF title page (viewed on Jan. 22, 2010). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 98-102).
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Smith, Brad Steven. "Design and Construction of Pavements in Cold Regions: State of the Practice." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1654.pdf.
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Craciun, Ovidiu Engineering & Information Technology Australian Defence Force Academy UNSW. "Matric suction response of unbound granular base materials subject to cyclic loading." Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/43927.
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The emergence of analytically-based pavement design has encouraged investigations toward a better understanding of the behaviour of pavement layers under cyclic loading. Unbound granular base (UGB) materials are commonly placed as base course layers in the design of pavement foundations. Due to their nature and geometry they are unsaturated geo-materials and therefore, it is desirable to study their behaviour using the framework of unsaturated soil mechanics. Current literature reflects very limited achievements in this direction. This thesis presents the development of a cyclic triaxial testing system and associated testing methodology that meets the challenges of testing an UGB material as an unsaturated soil. The testing system enables the initialisation of a specimen to target matric suction and facilitates direct measurement of its evolution under cyclic loading. In conjunction with the use of accurate on-specimens strain measurement transducers, ???clean??? strain and matric suction cyclic responses are obtained. Two types of cyclic triaxial testing are investigated: with constant cell pressure (i.e., CSeries testing) and with varying (cyclic) cell pressure where both axial and radial stress components are simultaneously (and in phase) pulsed (i.e., V-Series testing). Different initial matric suctions, si will be imposed in the testing program and the influence of si on material behaviour is analysed. This is investigated in a similar manner for C- and V-Series testing. The influence of si appears to be significant for both cyclic and permanent strain responses. A strong stress path dependency is found to characterise the behaviour of the UGB material. Under a wide range of cyclic deviator stress magnitudes, permanent strain response is found to correlate with that of matric suction response. Both appear to indicate better the relative performance of a UGB material than the response of resilient modulus. Another particular aspect investigated is the influence of additional fines on the behaviour of the UGB material. To ???isolate??? the effects of additional fines the cyclic and permanent strain responses of ???equivalent??? specimens with equivalent compaction and unsaturation condition, but different fines content, are compared. The results showed that the relative performance of the two materials (distinguished by the different percentage of fines content) in intertwined with the strong stress path dependency. It is also found that a material compacted at higher dry density may not improve its behaviour under cyclic loading, but may worsen with load cycles. Soil-water characteristic curve tests are conducted for the UGB materials investigated, showing high sensitivity of initial matric suction to moisture content, which increases further for the material with additional fines. This explains the notion of ???sensitivity??? of UGB materials as commonly suggested by practicing pavement engineers.
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Shami, Haroon I. "Evaluating permanent deformation in asphalt concrete using Georgia loaded wheel tester." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/19606.
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Teague, Frederick Thomas. "Characterization of road materials and environmental conditions for the analysis and design of flexible pavements in Hong Kong." Thesis, Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21451473.
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Edwards, Jonathan Paul. "Laboratory characterisation of pavement foundation materials." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/3067.
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Pavement foundations for major roads in the UK were historically designed on an empirical basis, related to a single design chart, restricting the incorporation of superior performing materials or materials for which the empirical data sets were not available. The adoption of performance based specifications was promoted as they are perceived to 'open up' the use of alternative materials (including 'local' sources of primary materials) or techniques, and allow for the incorporation of superior performance into the overall pavement design. Parallel developments to the performance based design of pavement foundations (allowing for superior performance) and in situ testing required the support of laboratory based performance tests. These laboratory based tests were required to determine material performance parameters (elastic modulus and resistance to permanent deformation) for both unbound and hydraulically bound pavement foundation materials. A review of the available laboratory apparatus indicated that they were either; unrealistic (and hence unable to provide the required material performance parameters), or overly complex and more suited to fundamental research. Therefore, the requirement for developmental research work was identified. The research reported herein details the development, manufacture and initial evaluation of simplified laboratory apparatus (the Springbox for unbound materials and static stiffness test for hydraulically bound mixtures) designed to produce the performance parameters of elastic modulus and relative resistance to permanent deformation for pavement foundation materials. The equipment and test procedure evaluation was undertaken across a range of materials, giving initial guidance on likely in situ performance. The innovative laboratory apparatus and materials guidance (including the potential to use recycled and secondary aggregates) was incorporated into key Highways Agency specification and guidance documents, which in turn influence construction practice outside of motorways and major trunk roads. This research concludes by outlining a number of recommendations for continued development and evaluation, including feeding back data sets from long term in situ performance testing for subsequent refinement of assumptions.
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Ng'anjo, Peter. "Research into the properties of lateritic gravels and their impact on pavement design." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51897.
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Thesis (M.Ing.)--Stellenbosch University, 2000.ENGLISH ABSTRACT: Laterites are used extensively in the tropics as road building materials in unbound base, sub-base layers and in surface layers. However, most base course specifications usually require the provision of crushed and graded stone or stabilized base and often exclude the general use of as-dug laterites or other naturally occurring gravels. Various field studies in the past have clearly indicated that many lateritic gravel deposits can be used successfully as base course materials in roads carrying low to medium traffic without incurring additional maintenance costs and with considerable cost savings in pavement construction rehabilitation. Further research is needed for the more precise definition of the relationship between laterite characteristics, traffic loading, environment, and pavement performance. In this study, extensive use was made of static and cyclic triaxial testing to investigate the fundamental behaviour of a lateritic gravel material. The tests produce information for characterizing the shear strength, stress-strain properties and behaviour under repeated loading. The gravel was sourced from stockpile at Malans Transport borrow pit at Maaitjies Kuil near Cape Town. Testing was conducted on the material both as granular material and stabilized with cement and foamed bitumen. Testing was done under various conditions of stress, moisture and compaction. The resilient modulus of the lateritic gravel was found to be affected by moisture and compaction apart from the stress condition. Well known models were used to characterize the stressdependent resilient modulus. A model for prediction of permanent deformation was developed which together with the resilient modulus model were applied to the design of a light pavement structure composed of lateritic gravel base.
AFRIKAANSE OPSOMMING: Lateriete word wydverspreid gebruik in die trope as 'n padbou materiaal. Die materiaal word gebruik in ongebonde kroonlae, stutlae en oppervlaklae. Die meeste spesifikasies vir kroonlae vereis dat gegradeerde gebreekte klip of gestabiliseerde materiaal in die kroonlaag gebruik word. Die spesifikasies maak nie voorsiening vir lateriet en gruis wat natuurlik voorkom nie. Verskeie veldstudies in die verlede het duidelik getoon dat lateritiese materiaal met sukses gebruik kan word in die kroonlae van paaie wat ligte tot medium verkeer dra. Lateriete kan gebruik word sonder addidionele onkoste vir instandhouding en daar is merkbare kostebesparings wanneer plaveisels rehabiliteer word. Die verhouding tussen lateriet eienskappe, verkeerslas, omgewingsinvloede en plaveisel werkverrigting moet beter gedefinieer word deur verdere navorsing. In hierdie studie is omvattend gebruik gemaak van eenmalige en herhaalde belasting drie-assige toetse om die fundamentele gedrag van lateritiese materiaal te definieer. Hierdie toetse se resultate lewer inligting oor die skuifsterkte, spanning-vervorming eienskappe en gedrag onder herhaalde belasting. Die gruis wat gebruik is, is verkry vanaf 'n materiaalopslag by die leengroef van Malans Transport te Maaitjies Kuil naby Kaapstad. Die materiaal is getoets as granulêre materiaal en gestabiliseer met sement en skuim-bitumen. Die toetse is gedoen onder verskillende toestande van spanning, voginhoud en verdigting. Daar is bevind dat die veerkragtigheidmodulus van die lateritiese gruis nie net deur die aangewende spanning beïnvloed word nie, maar ook deur die voginhoud en verdigting van die materiaal. Welbekende modelle is gebruik om die spanningsafhanklike gedrag van die materiaal te karakteriseer. 'n Model is ook ontwikkel om die permanente vervorming van die materiaal te voorspel. Die twee modelle vir die veerkragtigheidsmodulus en permanente vervorming is gebruik om 'n ligte plaveiselstruktuur mee te ontwerp wat 'n lateritiese kroonlaag bevat.
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Stephenson, Gregory John. "Use of stone mastic asphalt mixtures in road pavement maintenance and construction." Thesis, Queensland University of Technology, 2002.
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Joseph, Mathews. "P-WOLC model for heavy duty pavements project evaluation." Thesis, Queensland University of Technology, 2001. https://eprints.qut.edu.au/36155/1/36155_Joseph_2001.pdf.
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This research is aimed at developing a probabilistic based model for heavy-duty pavement project evaluation. To achieve this objective studies were conducted in the
area of traffic flow, traffic delay modelling, pavement deterioration, pavement condition monitoring, maintenance diaries, vehicle operating cost parameters and economic
theories related to asset management. Extensive literature reviews on related topics were carried out as part of the process of developing this model. The major features of the model are its ability to assign random probabilities to various pavement maintenance options and calculate the probabilistic based whole of life cost for any pavement type, for a given design life. To accomplish the task of developing the model a simple traffic delay model was developed. Traffic delay and costs were alculated using the model for predetermined pavement and traffic conditions. Studies were conducted using this model to prove the validity of considering user costs as the predominant cost in any pavement project evaluation process. A probabilistic based whole of life costing model concept was developed along with a supporting traffic delay model and a range of spreadsheets to meet the objectives of this research. This concept was tested using a complete range of data and by making some
realistic assumptions. The results obtained from this model are quite encouraging and are expected to provide the basis for a new innovative tool to pavement project
engineers for the purpose of pavement project evaluation.
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Honeywill, Greer 1945. "Colours of the kitchen cabinet : a studio exploration of memory, place, and ritual arising from the domestic kitchen." Monash University, Dept. of Fine Arts, 2003. http://arrow.monash.edu.au/hdl/1959.1/5621.
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Chilukwa, Nathan Ntanda. "Vibratory hammer compaction of granular materials." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80132.
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Thesis (MScEng)--Stellenbosch University, 2013.ENGLISH ABSTRACT: Compaction is one of the key processes in the construction of road pavement layers. Not only is it significant in ensuring the structural integrity of the material in the road layers, but it also has an influence on the engineering properties and performance of the soil material. A poorly compacted material is characterised by low density, high porosity and below standard shear strength. This, as a result causes rutting, moisture susceptibility, potholing, corrugations and passability problems on the road. Therefore, it is vitally important that field compaction is done correctly. For this reason, laboratory compaction methods have been developed to simulate the field compaction process in the laboratory. The Mod AASHTO test has long been used as the laboratory compaction method of choice by virtue of its simplicity and the lack of bulky equipment required. However, previous studies have established that the Modified AASHTO method does not adequately simulate field compaction criteria especially for cohesionless materials. Two reasons have been advanced; The Mod AASHTO compaction method does not adequately simulate the compaction done in the field when the granular mix is laid; The compaction method may cause disintegration of the material. Alternative tests have been considered and much research has focused upon the use of a modified demolition hammer (vibratory hammer) for laboratory compaction of granular materials. This study undertook to evaluate the influence of test factors pertinent to the vibratory hammer compaction method. The influence of these test factors on compaction time and obtainable material density was assessed with the objective of developing a compaction method for granular materials. Vibratory hammer compaction tests were conducted on G3 hornfels, G4 hornfels and G7 sandstone material types and to a lesser extent, reclaimed asphalt (RA). Densities obtained were referenced to Mod AASHTO compaction density. Findings of the study showed that, the mass of the tamping foot has a significant influence on the obtainable compaction density. Other factors such as, moisture content, frequency and frame rigidity were also found to affect compaction with the vibratory hammer. In addition, it is shown that the surcharge load does not significantly influence the obtainable compaction density but does contribute to the confinement of the material and restricts the upward bounce of the hammer. On the basis of the results and findings, a compaction method was proposed, incorporating test parameters and factors that would provide ideal results for a set compaction time. Repeatability tests showed that, the developed vibratory hammer compaction method was effective in compacting graded crushed stone material types (i.e. G3 and G4) and probably RA. The test was not as effective on the G7 material. Further studies on this material (G7) are required. In addition to the previous testing regime, a comparative assessment of the developed vibratory hammer compaction method in relation to the vibratory table method was done. The results show that the vibratory hammer is capable of producing specimens of densities comparable to those of the vibratory table. A sieve analysis undertaken before and after compaction showed that compaction with the developed vibratory hammer compaction method does not result in any significant material disintegration. Based on the results of this study, a specification for the determination of maximum dry density and optimum moisture content of granular material using the vibratory hammer is recommended.
AFRIKAANSE OPSOMMING: Kompaksie is een van die belangrikste prosesse in die konstruksie van die padplaveisel. Dit is nie net waardevol vir die versekering van strukturele integriteit van die materiaal, maar dit het ook 'n invloed op die ingenieurseienskappe en vermoë van die grond materiaal. 'n Swak gekompakteerde materiaal word gekenmerk deur 'n laë digtheid, hoë porositeit, on onvoldoende skuifweerstand. Die kenmerke maak die material vatbaar vir vogen. Lei tot spoorvorming, slaggate, golwe en deurgangs probleme op die pad. Dit is dus uiters noodsaaklik dat veld kompaksie korrek gedoen word. Om hierdie rede, is kompaksie metodes in die laboratorium ontwikkel om sodaend veldkompaksie te simuleer. Die “Mod AASHTO” laboratorium kompaksie toets is die gekose laboratorium kompaksie metode op grond van sy eenvoudigheid en gebruik van minimale toerusting. Vorige studies het egter bevestig dat die “Mod AASHTO”-metode nie veldkompaksie akkuraat kan simuleer nie, veral vir kohesielose materiaal. As gevolg van twee hoofredes; Die Mod AASHTO kompaksiemetode is nie ‘n realistiese en vergelykende simmulering van kompaksie soos dit in die veld gedoen word nie; Die kompaksie metode mag verbrokkeling van die materiaal veroorsaak. Alternatiewe toetse was oorweeg en baie navorsing het gefokus op die gebruik van 'n aangepaste vibrerende hamer. Hierdie studie het onderneem om verskeie relevante toetsfaktore van die vibrerende hamer en hul invloed op die kompaksie en verkrygbare digtheid te bestudeer. Die invloed van hierdie toetsfaktore op kompaksietyd en verkrygbare materiaal digtheid was geassesseer met die doel om 'n kompaksiemetode vir granulêre materiaal te ontwikkel. Vibrerende hammer kompaksietoetse was uitgevoer op G3 hornfels, G4 hornfels en G7 sandsteen materiaal en tot 'n mindere mate herwinde asfalt. Digthede verkry was verwys na die Mod AASHTO kompaksie digtheid. Resultate van die studie het getoon dat die gewig van die stamp voet ‘n merkwaardige invloed het op die verkrygbare kompaksie digtheid. Ander faktore soos voginhoud, frekwensie en raam styfheid het ook getoon om kompaksiedigtheid te beïnvloed met die vibrerende hammer. Benewens was ook getoon dat die toeslaglading geen beduidende invloed het op die verkrygbare kompaksie digtheid nie, maar wel bydrae tot die inperking van die materiaal en verhoed die vertikale terugslag van die hammer. Gebaseer op die resultate en bevindinge was ‘n kompaksiemetode voorgestel wat toets parameters integreer met toetsfaktore en tot volg ideale resultate vir ‘n gegewe kompaksietyd voorsien. Herhaalde kalibrasie toetse het getoon dat die ontwikkelde kompaksiemetode effektief is in die kompaktering van gegradeerde gebreekte klip materiaaltipes (G3 en G4) en moontlik herwanne asfalt. Die toets was nie so doeltreffend op die G7 materiaal nie. Verdere studies op hierdie materiaal (G7) is dus nodig. Addisioneel tot die vorige toets, is bevind dat ‘n vergelykende assesering van die ontwikkelde vibrerende hammer kompaksiemetode in verhouding tot die vibrerende tafel. Die resultate wys dat die vibrerende hammer die vermoë het om toetsmonsters met digthede vergelykbaar met die vibrerende tafel te produseer. Sifanalise voor en na kompaksie het getoon dat verdigting met die ontwikkelde vibrerende hamer kompaksie metode nie lei tot die disintegrasie van die materiaal nie. Gebasseer op die resultate van dié studie was ‘n spesifikasie vir die bepaling van maksimum droé digtheid en optimale voginhoud van granulêre material aangeraai.
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Stephens, Anthony W. "Improving the aesthetic and other experiential design aspects of bicycle paths in Western Australia." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2010. https://ro.ecu.edu.au/theses/874.
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Governments around Australia are in the process of promoting cycling as both a sustainable form of transport that can be a viable alternative to the motor vehicle, particularly for shorter trips, and as a healthy recreational pursuit that can play an important role in addressing the growing problem of obesity and illnesses associated with a sedentary lifestyle in the community. As part of this initiative, the development of effective and efficient infrastructure for bicycles is seen as a vital step for achieving higher participation rates.
A major component of the nation’s bicycle infrastructure is the growing networks of paved paths and natural surface trails located in both urban and regional areas. A well-designed path or trail must meet agreed standards related to safety and function and, in order to achieve maximum usage, it must also create a desirable riding experience. While requirements for safety and function are well understood by path and trail planners, little empirical information has been produced to enable these planning professionals to understand the elements that impact upon an individual’s riding experience and to then incorporate them into the design process.
Accordingly, the overall aim of this research was to investigate how the aesthetic, cultural and other experiential design aspects of bicycle paths and trails can enhance the perceived riding experience. A secondary objective of the project involved a determination of the procedural factors guiding the local path and trail design protocols and process. A third objective was to gain an insight into the most effective method of communicating the benefits of these riding environments to important target groups.
Following the establishment of a theoretical framework incorporating the psychophysical nature of cycling, the effect of landscape and current design practices, the research progressed through several stages beginning with an autoethnography examining the researcher’s extensive experience in the promotion of cycling in Western Australia, augmented by in-depth discussions with leading key informants. This was followed by a mix of quantitative and qualitative methodology to gauge perception of various elements of in-situ and photo-surrogate path-riding environments among the general population in Perth, Western Australia.
The findings indicate that there are specific experiential design aspects related to the riding environment, surrounding landscape or associated features that can directly influence a person’s decision to use a particular path, trail or route. The research also identified preferred communication strategies and found deficiencies in the current design process that if addressed, could lead to the development of better received and patronised riding environments.
It is intended that the outcome of this research will be to provide a design framework to guide path and trail planners in the development of facilities that enhance the overall riding experience. A number of agencies responsible for developing bicycle infrastructure, or design standards, have indicated a desire to access parts of this research project for use in the decision-making process, thus achieving a better balance between safety, functional and experiential aspects.
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Nanagiri, Yamini Varma. "Development of a rational method of designing hot mix asphalt (HMA) for low volume roads." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-01055-115823/.
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Gravina, Rebecca Jane. "Non-linear overload behaviour and ductility of reinforced concrete flexural members containing 500MPa grade steel reinforcement." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phg777.pdf.
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Includes corrigenda (inserted at front) and list of publications published as a result of this research. Includes bibliographical references (leaves 192-199) Investigates the overload behaviour and modes of collapse of reinforced concrete flexural members containing 500MPa grade reinforcing steel and evaluates the adequacy of current ductility requirements for design according to AS 3600 to ensure strength and safety.
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Mahony, Luke T. School of Mining UNSW. "Development of a laboratory facility for testing shear performance of installed rock reinforcement elements." Awarded by:University of New South Wales. School of Mining, 2006. http://handle.unsw.edu.au/1959.4/25700.
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Rock reinforcing elements provide a significant proportion of their ground control capability through offering resistance to shear movement of adjacent rock masses or blocks. This potential shear movement may take the form of sliding on horizontal bedding planes leading to strata bending; or block displacement along other geological structures such as joints or similar discontinuities. Much has been reported about this type of behaviour of rock bolts and other tendons, in theoretical concepts. However, there is a shortage of quality data available on the exact nature of this mechanism for shear resistance, and the role played by parameters such as pre-tensioning. A clearer understanding of the nature and significance of this type of behaviour has major implications for rock reinforcing materials and installation design. This thesis, which was supported by the Australian Coal Research Program (ACARP) describes the design, construction and commissioning of a laboratory testing facility at the School of Mining Engineering, University of New South Wales (UNSW), Australia and a subsequent testing program. The single failure plane design adopted in the test rig has been successful in allowing shear loading to be directly applied to fully installed rockbolts. Rockbolts were installed into an offset concrete rockmass, which consisted of two separate concrete samples that created a smooth shear plane surface. The reinforced samples were subjected to an applied shear load and critical parameters such as load and shear displacement were recorded. Influencing parameters such as concrete strength and applied pre-tension were altered and recorded to determine their effects on the overall shear performance of the sample. The failure mode of the rockbolts was also examined. The results indicate that a relative stronger rockmass material caused the rockbolt to fail within a lower shear displacement compared to a relatively weaker material. Also, a pre-tensioned rockbolt tended to resist shear displacement at least initially, until high shear loads developed. This phenomena is beneficial to ground support as less movement would tend to maintain integral strength of the rockmass. The use of strain-gauged rockbolts indicated as would be expected that the shear loading arrangement induced a compressive axial loading that tended to dissipate with distance from the shear surface.
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El-Gharib, Georges. "Evaluation of the Empirical Deck Design for Vehicular Bridges." UNF Digital Commons, 2014. http://digitalcommons.unf.edu/etd/489.
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This research evaluated the feasibility of the empirical design method for reinforced concrete bridge decks for the Florida Department of Transportation [FDOT]. There are currently three methods used for deck design: empirical method, traditional method and finite element method. This research investigated and compared the steel reinforcement ratios and the stress developed in the reinforcing steel for the three different methods of deck design. This study included analysis of 15 bridge models that met the FDOT standards. The main beams were designed and load rated using commercial software to obtain live load deflections. The bridges were checked to verify that they met the empirical method conditions based on the FDOT Structures Design Guidelines – January 2009. The reinforced concrete decks were designed using the traditional design method. Then the bridges were analyzed using three-dimensional linear finite element models with moving live loads. The reinforced concrete decks were designed using dead load moment, live load moment, and future wearing surface moment obtained from the finite element models. The required reinforcing steel ratio obtained from the finite element method was compared to the required reinforcing steel ratio obtained from traditional design method and the empirical design method. Based on the type of beams, deck thicknesses, method of analysis, and other assumptions used in this study, in most cases the required reinforcing steel obtained from the finite element design is closer to that obtained from the empirical design method than that obtained from the traditional design method. It is recommended that the reinforcing steel ratio obtained from the empirical design method be used with increased deck thicknesses to control cracking in the bridge decks interior bays.
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Taylor, John J. "Joseph John Talbot Hobbs (1864-1938) : and his Australian-English architecture." University of Western Australia. Faculty of Architecture, Landscape and Visual Arts, 2010. http://theses.library.uwa.edu.au/adt-WU2010.0100.
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Architect and soldier Sir J.J. Talbot Hobbs was born on 24 August 1864 in London. After migrating from England to Western Australia in the late 1880s, Hobbs designed many buildings that were constructed in Perth, Fremantle, and regional areas of the State. Although Talbot Hobbs has previously been recognised as a significant and influential contributor to architecture in Australia, his development as an architect has not been documented, nor has his design output undergone critical analysis. A number of problems confront attempts to interpret Hobbs' contribution to architecture. One is that a number of his most prominent building designs have been demolished. Another is that national recognition for his achievements as a First World War Army General have overshadowed his extraordinarily productive pre and post-war career as an architect. Military service was intrinsic to his character, and thus is woven in to this architectural biography. The thesis examines Hobbs' life and work, filling the gap in documented evidence of his contributions, and fitting it within the context of Australian architectural and social history. The main proposition to be tested is whether Hobbs' Australian architecture, of English derivation, combined with vast community service, warrants his recognition as an architect and citizen of national significance. Completely new important issues, information, discussion and facts that have resulted from the research for this thesis are: 1. Biographical knowledge about Hobbs' life including his upbringing, education and training in England, and his fifty years of comprehensive work and community service in and for Australia; 2. The elucidation of the late nineteenth and early twentieth century architectural issues that were relevant to Hobbs and other architects in Western Australia; 3. Examination of the important works of Hobbs' architect predecessors and contemporaries in Perth, and the setting of his own work within this context; 4. Revelation of his primary and pivotal role in war memorial design and organisational work for the far-flung theatres of Australian Army conflicts and selected personal design works within Australia itself during 1919-38; and 5. A chronology and summary of Hobbs' life, with thorough documentation of his output as a sole practitioner in the period 1887-1904 by development of a detailed web-based database - an extremely valuable tool for future researchers.
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Jooste, Fritz Joubert. "Structural classification of granular base pavements using measured deflection bowl parameters." Thesis, 2014. http://hdl.handle.net/10210/10224.
Full textAbstract:
M.Ing. (Civil Engineering)The: structural classification of granular base pavements by means of resilient deflection bowl parameters measured by the Impulse Deflection Meter and application of measured deflections at network level were investigated. The Investigation consisted of a mechanistic analysis and an analysis of observed field results. Curves for structural classification of granular base pavements obtained by regression are presented. The Curves obtained by the analysis of field observations compare well with local experience and theoretical failure criteria. It was found that the mechanistic model used in this study did not yield satisfactory results when simulating deflection behaviour through linear elastic programs. The parameters recommended for future use are Maximum Deflection (Y-rnax), Base Layer Index, or DLl (formerly SCI), Middle Layer Index, or MLl (formerly DOl) and Radius of Curvature. The use of deflection measurements at network level was also investigated. A method for calculating a Structural Stiffness Index to be incorporated into Pavement Management Systems as a Structural Indicator is proposed. Recommendations regarding the density of testing and identification of roads for testing at network level are also made. Several factors influencing deflections and structural bearing capacity are discussed and some recommendation." are made. The main factors influencing deflections and predicted pavement structural capacity were shown to be Temperature, Seasonal Influences and Condition of Surfacing. Further research into the specific influence of these factors on deflections and hearing capacity is needed.
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Liebenberg, Johannes Jacobus Erasmus. "A structural design procedure for emulsion treated pavement layers." Diss., 2003. http://hdl.handle.net/2263/25951.
Full textAbstract:
Please read the abstract (Dissertation Summary) in the section, 00front, of this documentDissertation (M Eng (Transportation Engineering))--University of Pretoria, 2008.
Civil Engineering
unrestricted
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Kuo, Yao-chen. "Highway earthwork and pavement production rates for construction time estimation." Thesis, 2004. http://www.lib.utexas.edu/etd/d/2004/kuoy81347/kuoy81347.pdf#page=3.
Full textAbstract:
Thesis (Ph. D.)--University of Texas at Austin, 2004.Vita. Includes bibliographical references (p. 329-334). Also available online via the University of Texas Libraries website (http://www.lib.utexas.edu/).
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Medina, Chávez César Iván. "Development and implementation of a mechanistic-empirical design procedure for a post-tensioned prestressed concrete pavement (PCP)." 2003. http://wwwlib.umi.com/cr/utexas/fullcit?p3116120.
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Hashiro, Reyn S. "Correlation of resistance value (R-value) with California Bearing Ratio (CBR) for use in the design of flexible pavements." Thesis, 2005. http://hdl.handle.net/10125/20481.
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Viyanant, Chirayus. "Potential use of recycled asphalt pavement and crushed concrete as backfill for mechanically stabilized earth walls." Thesis, 2006. http://hdl.handle.net/2152/2945.
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Trevino, Frias Manuel. "Techniques and procedures for bonded concrete overlays." 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3110594.
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Theyse, Hechter Luciën. "A mechanistic-empirical design model for unbound granular pavement layers." Thesis, 2010. http://hdl.handle.net/10210/3095.
Full textAbstract:
D.Ing.Unbound granular material has and is still being used with great success in the construction of road pavements in South Africa and many other countries around the world. Often this material is used in the main structural layers of the pavement with very little protection provided against high traffic induced stresses by way of a surface treatment or thin asphalt concrete layer. The performance of unbound granular pavement layers depend mainly on the level of densification and degree of saturation of the material in addition to the stress levels to which the layers are subjected. The main form of distress of unbound granular layers is the permanent deformation of the layer, either through the gradual deformation or rapid shear failure of the layer. Design engineers need accurate and appropriate design procedures to safeguard the road against such rapid shear failure and to ensure that the road has sufficient structural capacity to support the traffic loading over the structural design period. The recent trend in pavement design has been to move away from empirical design methods towards rational mechanistic-empirical design methods that attempt to relate cause and effect. Although a mechanistic-empirical pavement design method has been available in South Africa since the midseventies, increasing criticism has been levelled against the method recently. The models for characterising the resilient response and shear strength and estimating the structural capacity of unbound material have been of particular concern. The purpose of the research reported in this thesis was therefore to develop an improved mechanistic-empirical design model, reflecting the characteristics and behaviour of unbound granular material. The new design model consists of three components namely a resilient modulus, yield strength and plastic deformation damage model with each model including the effects of the density and moisture content of the material unbound granular where appropriate. The models were calibrated for a range of unbound materials from fine-grained sand and calcrete mixture to commercial crushed stone products using the results from static and dynamic tri-axial tests. An approximation of the suction pressure of partially saturated unbound material was introduced in the yield strength model and was validated with independent matric suction measurements on the sand and calcrete mixture. The yield strength model which is a function of the density and moisture conditions as well as the confinement pressure was calibrated for the individual materials with a high accuracy. A single plastic strain damage model was calibrated for the combined plastic strain data from all the crushed stone materials but a single model could not be calibrated for the plastic strain data of the natural gravels as these materials vary too much in terms of particle size distribution and the properties of the fines found in these materials. The formulation of the plastic strain damage model includes the density and degree of saturation of the material. A single resilient modulus model was calibrated for the combined resilient modulus data from all the materials excluding the data from a limited number of tests during which large plastic strain occurred. The resilient modulus model again ii incorporates the density, degree of saturation and the stress dependency of unbound granular material and is on an effective stress formulation for the bulk stress. Finally, the yield strength, resilient modulus and plastic strain damage models are combined in a mechanistic-empirical design model for partially saturated unbound granular material. Results from the proposed design method seem more realistic than results from the current design model and the model is not as sensitive to variation in the design inputs as the current design model is. In addition to this, the effects of the density and moisture content of the partially saturated, unbound granular material on the resilient response and performance of the material is explicitly included in the formulation of the proposed design model.
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Medina, Chávez César Iván. "Development and implementation of a mechanistic-empirical design procedure for a post-tensioned prestressed concrete pavement (PCP)." 2003. http://hdl.handle.net/2152/12357.
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Guya, Solomon Ramas. "Calibration of discrete element modelling parameters for bulk materials handling applications." Thesis, 2018. https://hdl.handle.net/10539/26654.
Full textAbstract:
A dissertation submitted in fulfilment of the requirements for the degree of Master of Science in Engineering to the Faculty of Engineering and the Built Environment, School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Johannesburg , 2018The Discrete Element Method (DEM) models and simulates the flow of gran ular material through confining geometry. The method has the potential to significantly reduce the costs associated with the design and operation of bulk materials handling equipment. The challenge, however, is the difficulty of determining the required input parameters. Previous calibration approaches involved direct measurements and random parameter search. The aim of this research was to develop a sequential DEM calibration framework, identify ap propriate calibration experiments and validate the framework on real flows in a laboratory-scale silo and chute. A systematic and sequential DEM calibration framework was developed. The framework consists of categorising the DEM input parameters into three cat egories of determining the directly measured input parameters, obtaining the literature acquired input parameters, and linking physical experiments with DEM simulations to obtain the calibrated parameter values. The direct mea surement parameters comprised the coefficients of restitution and the particle to wall surface coefficient of rolling friction. Literature obtained parameters were the Young’s Modulus and Poisson’s ratio. The calibrated parameters comprised the particle to wall surface coefficient of sliding friction calibrated from the wall fiction angle, the particle to particle friction coefficients (sliding and rolling) calibrated from two independent angles of repose, particle den sity calibrated from bulk density, and adhesion and cohesion energy densities. The framework was then tested using iron ore with a particle size distribution between +2mm and - 4.75 mm in LIGGGHTS DEM software. i Validation of the obtained input parameter values in the silo and chute showed very good qualitative comparisons between the measured and simulated flows. Quantitative predictions of flow rate were found to be particularly sensitive to variations in the particle to particle coefficient of sliding friction. It was concluded that due to their inherent limitations, angle of repose tests were not totally reliable to calibrate the particle to particle coefficient of sliding friction. Sensitivity tests conducted showed that in the quasi-static flow regime, only the frictional parameters were dominant, while both the frictional and colli sional parameters were dominant in the dynamic flow regime. These results are expected to lay a solid foundation for further research in systematic DEM cali bration and greatly increase the effectiveness of DEM models in bulk materials handling applications.
XL2019
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Saxton, Robert W. "Evaluation of crumb rubber modified mixtures using performance based analyses." Thesis, 1994. http://hdl.handle.net/1957/35184.
Full textAbstract:
This study investigated the laboratory performance of crumb rubber modified
mixtures compared to a standard bituminous mixture using performance based test
procedures. This study was part of an asphalt resurfacing program for the Seattle
Washington area. Laboratory analyses were used to estimate the long term pavement
performance of these mixtures in the field. Six mixtures were tested: The standard
Class 'A' surface mixture for the Seattle area, Plus Ride II�� base course gradation (dry
process) using AC 5 and AR 4000W binder types, Plus Ride II�� surface course
gradation (dry process) using AC 5 and AR 4000W binder types, and ARHM-GG
surface course gradation using crumb rubber modified (CRM) AR 2000 (wet process).
The performance based tests used on each mixture evaluated the different failure
modes a pavement may encounter in the field: fatigue cracking, permanent
deformation (rutting), thermal cracking, age hardening, and water sensitivity. Many of
the tests used were developed by the Strategic Highway Research Program (SHRP) to
test for a mixtures susceptibility in these failure modes.
Test results indicate the CRM mixtures performed better than the Class 'A'
surface mixture, with respect to fatigue cracking. All of the Plus Ride II�� mixtures
performed inadequately when tested for permanent deformation. On the other hand,
the ARHM-GG surface mixture performed well, even better than the Class 'A' surface
mixture with respect to permanent deformation. The ARHM-GG surface mixture
showed better low temperature characteristics when compared to the Class 'A' surface
and Plus Ride II�� mixtures. The CRM mixtures were less susceptible to aging than the
Class 'A' surface mixture. Finally, all of the mixtures demonstrated low moisture
sensitivity.
The final conclusions were made relative to the Class 'A' surface mixture. The
ARHM-GG surface mixture performed as well as, and in some cases better than, the
Class 'A' surface mixture. The ARHM-GG surface mixture may be used where the
Class 'A' surface mixture was specified. The Plus Ride II�� base and surface (AC 5
and AR 4000W) mixtures did perform better than the Class 'A' surface mixture in
some tests, however it performed worse in others. Therefore, it was recommended
that the Plus Ride II�� mixture designs be re-evaluated to provide adequate performance
in the failed tests.Graduation date: 1995
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Williamson, Terry J. "Concept(s) of the energy-efficient house in the temperate regions of Australia : a critical review / Terence John Williamson." 1997. http://hdl.handle.net/2440/19138.
Full textAbstract:
Computer disk in pocket attached to back cover.Bibliography: leaves 159-170.
System requirements for accompanying computer disk: Macintosh or IBM compatible computer. Other requirements: Microsoft Excel V 5.0 or later.
ix, 228 leaves : ill., map ; 30 cm + 1 computer disk (3.5")
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
In addressing the identification of the scope of energy-efficient goals within the broader design problem, the conceptions of the energy-efficient dwelling are examined, along with how published advice for the design of energy-efficient houses is derived from these conceptions, and the adequacy of this published advice as a basis for good design decisions.
Thesis (Ph.D.)--University of Adelaide, Dept. of Architecture, 1997
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Williamson, Terence John. "Concept(s) of the energy-efficient house in the temperate regions of Australia : a critical review / Terence John Williamson." Thesis, 1997. http://hdl.handle.net/2440/19138.
Full textAbstract:
Computer disk in pocket attached to back cover.Bibliography: leaves 159-170.
System requirements for accompanying computer disk: Macintosh or IBM compatible computer. Other requirements: Microsoft Excel V 5.0 or later.
ix, 228 leaves : ill., map ; 30 cm + 1 computer disk (3.5")
In addressing the identification of the scope of energy-efficient goals within the broader design problem, the conceptions of the energy-efficient dwelling are examined, along with how published advice for the design of energy-efficient houses is derived from these conceptions, and the adequacy of this published advice as a basis for good design decisions.
Thesis (Ph.D.)--University of Adelaide, Dept. of Architecture, 1997
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Gravina, Rebecca Jane. "Non-linear overload behaviour and ductility of reinforced concrete flexural members containing 500MPa grade steel reinforcement / by Rebecca Jane Gravina." Thesis, 2002. http://hdl.handle.net/2440/21791.
Full textAbstract:
Includes corrigenda (inserted after title page) and list of publications published as a result of this research.Includes bibliographical references (leaves 192-199)
xxvii, 223 leaves : ill. ; 30 cm.
Investigates the overload behaviour and modes of collapse of reinforced concrete flexural members containing 500MPa grade reinforcing steel and evaluates the adequacy of current ductility requirements for design according to AS 3600 to ensure strength and safety.
Thesis (Ph.D.)--University of Adelaide, Dept. of Civil and Environmental Engineering, 2002
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Wong, Anthony Kar Man. "Theoretical investigation of Australian designed reinforced concrete frames subjected to earthquake loading." Thesis, 1999. http://hdl.handle.net/2440/114585.
Full textAbstract:
Studies the behaviour of reinforced concrete frame structures designed in accordance with AS3600 concrete structures code using a non-linear computer model. A computer model of a multi-storey multi-bay prototype structure was created.Thesis (M.Eng.Sc.) -- University of Adelaide, Dept. of Civil and Environmental Engineering, 1999
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Fowler, Smith Juliet, University of Western Sydney, and College of Social and Health Sciences. "Inhabiting space and place : from installation to the clinical setting." 2002. http://handle.uws.edu.au:8081/1959.7/25608.
Full textAbstract:
This paper explores the relationship between place in installation art and its relevance to the practice of placemaking in a hospital setting. The discussion draws on phenomenology, psychodynamic theory and contemporary art, in particular the author's art experience of places, their formal qualities and potential meanings, along with, an examination of what creates an embodied sense of being contained at home ( emotionally and physically). Some of the questions posed for discussion include; what is it about places that becomes inherent to memory and shapes its form? How do places impact on what we do there and who we are? Is place more significant in memory for a young child or someone in a vulnerable state of being (as in the hospital setting)? Process issues, along with physical outcomes, in installations and in the hospital projects are discussed.Master of Arts (Hons)
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Stasinopoulos, Peter. "A system dynamics approach to life cycle assessment." Phd thesis, 2013. http://hdl.handle.net/1885/150676.
Full textAbstract:
Cars consume a large amount of energy and material resources, and generate large environmental impacts, through their production, use, and disposal. Some automotive engineers use the life cycle assessment (LCA) method to estimate and understand these environmental impacts arising from their design decisions. The standard LCA method, however, makes some limiting assumptions that exclude changes in parameter values over time. This lack of the temporal dimension leads to uncertainty in estimates, especially for new, high-volume, long-life products, such as cars. The aim of this thesis is to explore the value and challenges of an LCA method that can account for changes in resource consumptions and environmental impacts over time. This thesis modifies the standard LCA method to include some dynamics-the way that the state of a system changes over time in response to internally-generated and externally-imposed forces. A case study considers the technological intervention of replacing steel with lightweight materials in passenger cars in Australia. It considers the dynamics of the wider 'car system' at the level of the product fleet and resource flows, but not at the level of the environmental impacts. This thesis takes a System Dynamics (SD) approach by developing a computational model, a hypothesis of how the system works. The model explains the growth in the Australian car-fleet fuel consumption despite persistent policy intervention by government to decrease fuel consumption, compliance and technology innovation by car manufacturers, and shifts in transportation preferences to non-car modes by travellers. The model also allows the exploration of future scenarios wherein some car manufacturers adopt lightweight-material components and battery-electric powertrains. The computed values are used in spreadsheet calculations of resource flows and environmental impacts. The simulations of the SD model estimate that many resource benefits of lightweight cars take decades to accumulate because steel cars drain out of the fleet slowly. Furthermore, if the population of car travellers continues to grow, then oil depletion and growth in urban density could cause rapid declines in driving intensity and in the size of the petrol car fleet. Low driving intensity makes it difficult to recover the high energy investment in lightweight materials. Finally, the adoption of battery-electric cars enables car travellers to avoid most effects of oil depletion, but traffic congestion could still cause moderate declines in driving intensity and in the car fleet. The inclusion of the dynamics in an LCA study leads to surprising insights-some computational parameters, usually assumed to be constants or fixed functions of time, are considerably nonlinear. The results of the case study suggest that mass-reduction and similar 'efficiency' interventions are less effective than intended because the balancing loops and buffers of the system prevent parameters from operating in critical ranges that shift feedback loop dominance. The considerable investment into such technological interventions could be redirected, for greater effect, to policy interventions that target fuel security and traffic congestion through the behaviour and decision-making of travellers. The superiority of such interventions can be difficult to identify with a linear worldview of complex systems.
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Swift, John Paul. "Reframing the dynamics: a case study of the interaction between architectural computing and relationship-based procurement at the National Museum of Australia." 2006. http://hdl.handle.net/2440/47785.
Full textAbstract:
The National Museum of Australia (NMA) (1997- 2001) by architects Ashton Raggatt McDougall (ARM) in association with Robert Peck von Hartel Trethowan was commissioned by the Australian Commonwealth Government for the Centenary of Federation in 2001. It was conceived as a gift to the people of Australia and now stands on Acton Peninsula in Canberra, the nation's Capital. It is a visually complex manifestation of the design architects' (ARM) dialogue with the ambiguities of Australian history and national identity. The architectural realisation of these complexities was facilitated through advances in computer technologies and a complementary non-traditional procurement method, both at the leading edge of Australian architectural practice of the time. Completed three years earlier was probably the most debated work of architecture of the 1990s, the Guggenheim Museum (GMB) (1991-98) in Bilbao, Spain, by Frank O. Gehry and Associates (FOG&A). This satellite museum of the Guggenheim Foundation of New York was heralded as the quintessential example of a kind of architecture only possible because of advances in computer technologies. Both visually complex museums were conceived as flagship projects and consequently share many political, functional, and cultural expectations. Both were procured outside the usual adversarial designer/builder paradigm of western architecture and featured the innovative use of three-dimensional (CAD) software for design, documentation and analysis. The NMA project used a government instigated procurement method which was embraced by a group of design and construction companies who formed a joint venture known as the Acton Peninsula Alliance. This non-traditional or relationship-based procurement method required ARM to reassess their approach to generate and disseminate design data and their traditional relationship with other design and construction professionals. As part of this process, ARM were required to devolve some of their design authority to a project delivery team via a Design Integrity Panel and an Independent Quality Panel; both innovations integral to the Acton Peninsula Alliance. The NMA project reframed many of the enduring professional relationships of Australian architecture and in so doing extended the skill set and expectations of the architects and others to include a more substantial engagement with 3D CAD and a procurement system which was less subject to many of the common impediments inherent in the more traditional processes. Through a series of interviews with the architects and other stakeholders, a qualitative methodology was used to investigate the NMA as a case study which uses the GMB as an internationally recognised comparison. This thesis examines how these two projects have been successfully completed within time and budgetary constraints in an environment where flagship projects have had a history of highly publicised difficulties. It reveals that the successful realisation of the NMA was due to the relationships built or reframed as a result of this cooperative approach in conjunction with high levels of engagement with computer technologies. This is in contrast to the seamless flow of data and high levels of prefabrication integral to the success of the GMB.http://proxy.library.adelaide.edu.au/login?url= http://library.adelaide.edu.au/cgi-bin/Pwebrecon.cgi?BBID=1255317
Thesis (Ph.D.) -- University of Adelaide, School of Architecture, Landscape Architecture and Urban Design, 2006.
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Swift, John Paul. "Reframing the dynamics: a case study of the interaction between architectural computing and relationship-based procurement at the National Museum of Australia." Thesis, 2006. http://hdl.handle.net/2440/47785.
Full textAbstract:
The National Museum of Australia (NMA) (1997- 2001) by architects Ashton Raggatt McDougall (ARM) in association with Robert Peck von Hartel Trethowan was commissioned by the Australian Commonwealth Government for the Centenary of Federation in 2001. It was conceived as a gift to the people of Australia and now stands on Acton Peninsula in Canberra, the nation's Capital. It is a visually complex manifestation of the design architects' (ARM) dialogue with the ambiguities of Australian history and national identity. The architectural realisation of these complexities was facilitated through advances in computer technologies and a complementary non-traditional procurement method, both at the leading edge of Australian architectural practice of the time. Completed three years earlier was probably the most debated work of architecture of the 1990s, the Guggenheim Museum (GMB) (1991-98) in Bilbao, Spain, by Frank O. Gehry and Associates (FOG&A). This satellite museum of the Guggenheim Foundation of New York was heralded as the quintessential example of a kind of architecture only possible because of advances in computer technologies. Both visually complex museums were conceived as flagship projects and consequently share many political, functional, and cultural expectations. Both were procured outside the usual adversarial designer/builder paradigm of western architecture and featured the innovative use of three-dimensional (CAD) software for design, documentation and analysis. The NMA project used a government instigated procurement method which was embraced by a group of design and construction companies who formed a joint venture known as the Acton Peninsula Alliance. This non-traditional or relationship-based procurement method required ARM to reassess their approach to generate and disseminate design data and their traditional relationship with other design and construction professionals. As part of this process, ARM were required to devolve some of their design authority to a project delivery team via a Design Integrity Panel and an Independent Quality Panel; both innovations integral to the Acton Peninsula Alliance. The NMA project reframed many of the enduring professional relationships of Australian architecture and in so doing extended the skill set and expectations of the architects and others to include a more substantial engagement with 3D CAD and a procurement system which was less subject to many of the common impediments inherent in the more traditional processes. Through a series of interviews with the architects and other stakeholders, a qualitative methodology was used to investigate the NMA as a case study which uses the GMB as an internationally recognised comparison. This thesis examines how these two projects have been successfully completed within time and budgetary constraints in an environment where flagship projects have had a history of highly publicised difficulties. It reveals that the successful realisation of the NMA was due to the relationships built or reframed as a result of this cooperative approach in conjunction with high levels of engagement with computer technologies. This is in contrast to the seamless flow of data and high levels of prefabrication integral to the success of the GMB.Thesis (Ph.D.) -- University of Adelaide, School of Architecture, Landscape Architecture and Urban Design, 2006.
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Li, Wen. "Mechanisms for phosphorus elimination in constructed wetlands: a pilot study for the treatment of agricultural drainage water from dairy farms at the Lower River Murray, South Australia / Li Wen." 2002. http://hdl.handle.net/2440/21868.
Full textAbstract:
Includes list of publications issued during the candidature.Bibliography: leaves 176-197.
iii, ix, 197, [22] leaves : ill., maps ; 30 cm.
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
Phosphorus retention was measured in five pilot-scaled constructed wetlands with different configurations in terms of macrophyte species and substrates in order to evaluate the phosphorus removal efficiency of water plants and substrates in experimental ponds; assess the contribution of macrophytes to phosphorus removal through direct uptake, modification of water chemistry and impacts on the phosphorus adsorption characteristics of substrate; and, contribute to the optimal design and operation of constructed wetlands for the treatment of agricultural drainage water.
Thesis (Ph.D.)--University of Adelaide, Dept. of Soil and Water, 2002?
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Li, Wen. "Mechanisms for phosphorus elimination in constructed wetlands: a pilot study for the treatment of agricultural drainage water from dairy farms at the Lower River Murray, South Australia / Li Wen." Thesis, 2002. http://hdl.handle.net/2440/21868.
Full textAbstract:
Includes list of publications issued during the candidature.Bibliography: leaves 176-197.
iii, ix, 197, [22] leaves : ill., maps ; 30 cm.
Phosphorus retention was measured in five pilot-scaled constructed wetlands with different configurations in terms of macrophyte species and substrates in order to evaluate the phosphorus removal efficiency of water plants and substrates in experimental ponds; assess the contribution of macrophytes to phosphorus removal through direct uptake, modification of water chemistry and impacts on the phosphorus adsorption characteristics of substrate; and, contribute to the optimal design and operation of constructed wetlands for the treatment of agricultural drainage water.
Thesis (Ph.D.)--University of Adelaide, Dept. of Soil and Water, 2002?