Architecture, Building and Planning - Research Publications
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ItemThe lIfe cycle performance of Monomur in Australian residential construction(Green Building Council Spain, 2014)Brick veneer is the most dominant construction type in Australia; however it is not necessarily the most advantageous for the climate. Mass wall types, where massing is evident on the interior of the building, can help to achieve greater thermal performance. Monomur thermal blocks are a thermal mass system, based on single leaf construction. They are resistant to compression, transfer of heat, and are made from natural clay. Monomur has shown to benefit construction in Europe, most predominantly France, where the push for low energy buildings is high on the national agenda. This study aimed to determine the life cycle energy performance of the use of the monomur system in Australian residential construction. A life cycle energy analysis (LCEA) was used to quantify and compare the life cycle energy performance of two case study houses, one built from monomur and one from brick veneer. It was shown that there is minimal difference in the performance of these two construction approaches, paving the way for the potential use of monomur in the Australian context.
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ItemAn early-stage life cycle model for low-energy buildiings(Green Building Council Spain, 2014-10-30)The aim of this study is to demonstrate the application of a model previously developed by the authors for low-energy building design, to show how the availability of comparable energy performance information at the building design stage can be used to better optimise a building’s energy performance. The life cycle energy demand of a case study building was quantified using a comprehensive embodied energy assessment technique and TRNSYS thermal energy simulation software. The building was then modelled with variations to its external assemblies in an attempt to optimise its life cycle energy performance. The alternative assemblies chosen were those shown through the authors’ early-stage life cycle energy model to result in the lowest life cycle energy demand for each building element. The study showed that significant life cycle energy savings, up to 45%, are possible through the modelling of individual building elements for the case study building.
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ItemBuilding service life and its effect on the life cycle embodied energy of buildings(Elsevier, 2015)The building sector is responsible for significant energy demands. An understanding of where this occurs across the building life cycle is critical for optimal targeting of energy reduction efforts. The energy embodied in a building can be significant, yet is not well understood, especially the on-going ‘recurrent’ embodied energy associated with material replacement and building refurbishment. A key factor affecting this ‘recurrent’ embodied energy is a building's service life. The aim of this study was to investigate the relationship between the service life and the life cycle embodied energy of buildings. The embodied energy of a detached residential building was calculated for a building service life range of 1–150 years. The results show that variations in building service life can have a considerable effect on the life cycle embodied energy demand of a building. A 29% reduction in life cycle embodied energy was found for the case study building by extending its life from 50 to 150 years. This indicates the importance of including recurrent embodied energy in building life cycle energy analyses as well as integrating building service life considerations when designing and managing buildings for improved energy performance.
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ItemConcept and barriers for the economic value of low-energy houses(Royal Institution of Chartered Surveyors, 2015)This study explores the market revealed price of low-energy residential buildings and why the economic value of low-energy housing products is less transparent in active residential markets. It explores Australian and Japanese conditions and examines the proposition by using embodied energy, operational energy and market price data of selected housing stock in Australia. The study aims to examine a new perspective towards understanding the barriers to ascertaining the economic value of low-energy buildings. In particular, the study examines the composition of energy consumption associated with the residential property life cycle. Operational energy is linked to consumer preference by its inter-temporal value estimate of future expected utility or benefit flow. A ‘low’ embodied energy house is an environmental construct, which does not appear to currently link to short-term market value perception. It does not strongly link to an expected (intuitive) benefit. This ‘gap/disconnect’ creates a barrier to estimating a holistic economic value of low-energy residential property.
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ItemExploring the relationship between Melbourne’s water metabolism and urban characteristics(State of Australian Cities Research Network, 2015)Cities can be seen as complex urban systems that mobilise local and global resource flows to meet the needs of their inhabitants and their manufacturing sector. However, the local consumption of resources can be responsible for major local and global environmental changes that impact the human health and wellbeing inside and outside of the boundary of the urban system. With global urban population expected to continue to grow, the mitigation of further future environmental pressures from urban consumption is of critical importance. The complexity of the interrelationships between the local social, political, cultural, economic and environmental facets of a city as well as the interrelationship between these local characteristics and urban consumption, dictate that each city will have a different set of parameters that drive urban consumption. This research will investigate this issue by exploring the relationship between Melbourne’s water metabolism and its urban characteristics. In practice, this study will correlate the spatially disaggregated water use of Melbourne with local factors such as demography, average income, territorial organisation, etc. It will then be possible to identify which urban characteristics have the greatest influence on water use and ultimately help to inform the development and implementation of the most appropriate and best targeted policies for reducing water use across Melbourne Metropolitan Area.
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ItemA holistic model for designing and optimising sustainable prefabricated modular buildings(University of Moratuwa, 2012)
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ItemMore than a survey: An interdisciplinary post-occupancy tracking of BER schools(Taylor & Francis, 2012)In February 2009, the Australian Government announced the $16.2b Building the Education Revolution (BER) as part of an economic stimulus package. In the context of a global financial crisis, the Government called for ‘shovel ready’ projects requiring state education departments to develop template designs to speed the delivery process. Three years later, new facilities have been completed in over 1100 government schools in Victoria (DEECD, 2012). This article outlines research by an interdisciplinary team to track the early occupation of a template design used inVictoria. The design template was unusual: it enabled schools to continue using traditional classroom teaching or to slide open walls to form larger neighbourhoods suitable for team teaching. Our research linked different methodological frameworks to undertake post-occupancy evaluation (POE) of the new spaces. POE strategies are often driven by construction and project management perspectives rather than focus on organizational issues and user behaviour.
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ItemTime-efficient post-disaster housing reconstruction with prefabricated modular structures(Open House International Association, 2014-09-01)With many natural disasters such as earthquakes, cyclones, bushfires and tsunamis destroying human habitats around the world, post-disaster housing reconstruction has become a critical topic. The current practice of post-disaster recon- struction consists of various approaches that carry affected homeowners from temporary shelters to permanent hous- ing. While temporary shelters may be provided within a matter of days as immediate disaster relief, permanent hous- ing can take years to complete. However, time is critical, as affected communities will need to restore their livelihoods as soon as possible. Prefabricated modular construction has the potential to drastically improve the time taken to pro- vide permanent housing. Due to this time-efficiency, which is an inherent characteristic of modular construction, it can be a desirable strategy for post-disaster housing reconstruction. This paper discusses how prefabricated modular struc- tures can provide a more time-efficient solution by analysing several present-day examples taken from published post- disaster housing reconstruction processes that have been carried out in different parts of the world. It also evaluates how other features of modular construction, such as ease of decommissioning and reusability, can add value to post- disaster reconstruction processes and organisations that contribute to the planning, design and construction stages of the reconstruction process. The suitability of modular construction will also be discussed in the context of the guidelines and best practice guides for post-disaster housing reconstruction published by international organisations. Through this analysis and discussion, it is concluded that prefabricated modular structures are a highly desirable time-efficient solu- tion to post-disaster housing reconstruction.
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ItemA Social Network based framework for assessing risks and vulnerability in built environment(The University of Newcastle, 2015)The highly interconnected infrastructure networks are the backbones for supporting community within our society. The community is highly vulnerable to catastrophic failures of these networks and the cascading effect of such failures can affect society at multiple levels such as business, end-user or neighbourhood levels. This research aims to develop a model for understanding the community dependency on the infrastructure operations, assessing risks and vulnerability and developing resilience in the community in the advent of disruptions. Traditional risk management practice for identifying the risks and impacts is based on subjective judgement. Such practice does not provide any good basis to understand the cascading effects of risks being propagated from one to the next and differential impacts upon the various groups of community by their roles and dependencies with the infrastructure systems. A new computational model is thus required for accurate representation of the interconnected infrastructure networks and service provisions supporting the multi-level community groups. The multilevel community groups or sub-groups usually include wider community differentiated by the roles such as businesses, neighbourhoods or users etc. Social Network Analysis (SNA) methodology provides a significant opportunity to address these challenges by mapping out the key actors and their associations with the risk events in any particular context. Based on a pilot study, this research develops a model that allows visualising the interconnectedness of the risk events associated with the critical infrastructures and the community and assessing impacts on community in the event of any disturbances in the infrastructure networks. Application of model allows understanding the impacts and thereby developing resilience and supporting wellbeing within the vulnerable community.
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ItemNo Preview AvailableHouse size and future building energy efficiency regulations in Australia(The Architectural Science Association and The University of Melbourne, 2015)The size of houses in Australia has significantly increased over the last decades. New houses have higher embodied and operational energy requirements due to their increased use of materials and larger area. Yet, current building energy efficiency regulations fail to adequately capture the effect of house size because of their omission of embodied energy and their sole use of a spatial functional unit for operational energy (e.g. MJ/m²). This study quantifies the effect of house size on life cycle energy demand in order to inform future building energy efficiency regulations. It uses a parametric model of a typical suburban house in Melbourne, Australia and varies its floor area from 100 to 392 m² for different household sizes. Both initial and recurrent embodied energy requirements are quantified using hybrid analysis and all operational energy end-uses (thermal and non-thermal) are calculated in primary energy terms over 50 years. Results show that larger houses appear to be more energy efficient per m² than smaller houses while actually having a much higher life cycle energy demand. Also, embodied energy represents 49-70% of the energy demand across all 360 variations. Guidelines are provided to improve current building energy efficiency regulations.