Ho King Hei. / "Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 2005-2006, design report." / Includes bibliographical references (leaf [22] (2nd gp.)). / Chapter 1.0 --- Thesis statement / Chapter 2.0 --- Introduction / Chapter 3.0 --- Design Study / Chapter 3.1.0 --- Site Context / Chapter 3.1.1 --- City Fabric / Chapter 3.1.2 --- City Content / Chapter 3.1.3 --- Elderly Towers / Chapter 3.2.1 --- Building Context / Chapter 3.2.2 --- Building Content / Chapter 4.0 --- Design and Methodology / Chapter 4.1 --- Design Development / Chapter 4.2 --- Design Process / Chapter 4.2.1 --- Programmatic Re-shuffled / Chapter 4.2.2 --- Programmatic Integration / Chapter 4.2.3 --- Structural System / Chapter 4.2.4 --- Site Planning / Chapter 4.2.5 --- Internal Planning / Chapter 4.2.6 --- Vertical Planning / Chapter 5.0 --- Achievement / Chapter 6.0 --- Conclusion and Comments

Thesis. 1977. M.Arch.--Massachusetts Institute of Technology. Dept. of Architecture. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / Bibliography : leaf 74. / M.Arch.

Thesis. 1977. M.Arch.--Massachusetts Institute of Technology. Dept. of Architecture. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ROTCH. / Bibliography : leaf 77. / by Michael B. Johnson. / M.Arch.

Current global efforts for energy conservation and optimization are focused on improvements in energy supply and production systems, and on encouraging the adoption of energy-efficient devices and equipment. However, systematic assessments of economic and technical implications when adopting energy-efficient alternative systems in buildings have not yet been explored thoroughly. The uncertainty about the consequences of investing in alternative energy-efficient systems has led to a prolonged utilization of obsolete building systems (underperforming HVAC systems, inefficient lighting systems, badly maintained and equipment, and so forth). This has led to overall poor energy efficiency, creating considerable burden on the building operation budget. This research discusses the procedure for formulating an investment strategy to improve existing building energy performance. The approach is suitable for large building portfolios where a plethora of potential refurbishment interventions can be considered. This makes our approach especially suited for use on university campuses and most of this report will focus on that particular application utilization protocols especially for use on campuses. This investment model only looks at the energy related savings versus investments; it is well understood that the ultimate selection of the optimal set of improvement options of a portfolio will be determined by additional considerations, such as overall value, occupant satisfaction, productivity improvements, aesthetics, etc. Nevertheless, many campus managers are confronted with the question how much energy they can save with a given investment amount. This is exactly what our approach helps to answer. The investment optimization strategy is implemented in software "InvEnergy," which systematically calculates the costs and benefits of all possible building-technology pairings, taking uncertainties in the saving/investment calculations and estimates into account. This tool empowers decision makers in facility management to make complex investment decisions during continuous building commissioning.

published_or_final_version / Housing Management / Master / Master of Housing Management

This creative project thesis is an exploration of the connected experiences in light, space and time, developed through the 'making'of architecture. The process began with the concept of 'installation', in which the practice evolves from a vast spectrum of disciplines. The objective is to create an alternative spatial experience, occurring within an existing building. A piece of architecture through which the environment may be activated by the presence of light, material and man . An abandoned old building was chosen as the site in which to create the project. The repair and the creation of the new combined, creating the installation of a space which both respects and evolves from the existing. The process of rehabilitation and the 'making' of architecture offering a variety of interactive opportunities; of dialogue and language which furthers the understanding of society and the conception of architecture. / Department of Architecture

A special problem in many reinforced concrete structures built in the 1970s and earlier is the lack of continuity between elements. Continuity is a characteristic of structures essential to preventing collapse. Therefore, in extreme loading conditions such as loss of a column support due to terrorist attack or if earthquake or other extreme actions occur, the structures could be vulnerable to collapse. The study reported here focused on two structural discontinuities in existing reinforced concrete structures, discontinuity in bottom reinforcement in beams (horizontal discontinuity) and poorly detailed lap splices in columns (vertical discontinuity). The objective of this study was to develop rehabilitation methods using CFRP to provide continuity of reinforcement in existing structures. To develop the rehabilitation methods, two separate experimental studies were conducted using beam and column specimens. CFRP materials were applied to the bottom or side face of a beam and anchored using CFRP anchors or U-wraps to provide horizontal continuity in bottom reinforcement and tested under dynamic loading. After CFRP rehabilitation, the ductility of the bottom reinforcement and large rotational capacity of the beam were realized. CFRP materials were also applied to the lap splice region in square and rectangular columns which exhibited a brittle splice failure as-built. After rehabilitating the columns using CFRP jackets and anchors, the failure mode changed from a brittle splice failure to yield of column reinforcement, and the strength and deformation capacity were improved under both monotonic and cyclic loading. Based on the results of beam and column tests, design guidelines for CFRP rehabilitation were proposed. Horizontal and vertical continuities can be provided through the use of CFRP for rehabilitating existing reinforced concrete structures that were designed prior to the introduction of codes that require continuous reinforcement along members and between adjacent members. The vulnerability of such structures to collapse can be reduced through rehabilitation. / text

INTRODUCTIONThis research investigates the assessment for the rehabilitation of the Pretoria State Garage (PSG) for the purpose of accommodating the Pretoria Technology Park (PTP). The Pretoria State Garage courtyard is comprised of industrial type of buildings, most of which stand obsolete due to a shift in the manufacturing process. These buildings are structurally sound and historically significant. They offer a major opportunity for conversion to attract business through providing relatively inexpensive commercial and industrial spaces to small and medium sized companies. The site is located in the southwest quadrant of Pretoria Central in which a number of sites and buildings are currently being downgraded in the urban revitalisation process, due to preferred, other technologies of construction. The assessment for the rehabilitation of the site evaluates the spatial qualities and the physical forms of buildings in relation to the new user, while the establishment of the PTP focuses on maintaining, elongating and innovating the industrial manufacturing tradition of the site. The incorporation of the PTP on the PSG site is implemented through the fitting process. RESEARCH AREAThe research focuses on the three main areas dealing with: <ul><li> Programming and planning of the Pretoria Technology Park </li><li>Rehabilitation assessment of the Pretoria State Garage</li><li> Architectural fitting process <br></li></ul> 1. Programming and planning of the Pretoria Technology Park The development methodology is employed for the establishment of a sustainable Pretoria Technology Park, which stems from local technology demand, supply and transfer. As a result, different centres are established to provide accommodation and services to major activities of the park dealing with administration, provision of advanced technology services and accommodation for technology-based firms. Individual centres are discussed according to their envisaged spatial qualities and design specifications. 2. Rehabilitation assessment of the Pretoria State Garage The rehabilitation assessment explores the historic significance and architectural values of the PSG. The outcome of the rehabilitation assessment defmes the manner and the degree in which various rehabilitation interventions could be executed. The process includes proposals for the demolition of unwanted structures and elements, investigating the long-term resilience of buildings to be retained and assessing negative physical features of the site. 3. Architectural fitting process Specific dimensions and spatial requirements of both the PSG (physical) and the PTP (intellectual) respectively are compared for the purpose of mutual fitting. / Dissertation (MArch)--University of Pretoria, 2005. / Architecture / unrestricted

Air pollution of late has been the focus of many studies due to the detrimental health risks that it poses to individuals. University environments have several academic departments with peculiar activities that could be affecting the indoor and outdoor air quality (AQ) of these environments. University settings differ from other environments because of the variety of activities and different lines of work that go on inside buildings housing academic departments and their surroundings, which are likely to have an impact on indoor air quality (IAQ) and outdoor air quality (OAQ) in this environment. Only a few AQ studies have been done in university sites and surrounds worldwide and in these studies, IAQ was given primary importance; whereas, the outdoor environment was and is often neglected. A study comparing both IAQ and OAQ is critical to further understand the relationship between IAQ and OAQ within a university campus. The University of Limpopo (UL) in the Mankweng township of South Africa has been undergoing some refurbishments with numerous construction activities going on in addition to the academic activities of UL. These activities may be affecting the AQ in this unique environment. The main aim of this study was to determine differences between indoor and outdoor AQ in a university environment and to understand how AQ in this unique environment varies with seasons and building function. The study was carried out in three buildings housing three different academic departments in UL namely: Department of Physiology and Environmental Health (PEH), Department of Biochemistry, Microbiology, and Biotechnology (BMBT) and the Department of Biodiversity (BIOD). Twenty indoor and 20 outdoor measuring sites were identified per departmental building from where real-time measurements of 11 AQ parameters (linear air velocity (LAV), dry-bulb temperature (Tdb), relative humidity (RH), carbon monoxide (CO), carbon dioxide (CO2), ozone (O3), sulphur dioxide (SO2), nitrogen dioxide (NO2), hydrogen sulphide (H2S), non-methane hydrocarbons (NMHCs) and volatile organic compounds (VOCs)) were taken over three consecutive days per season. Thus, a total of 60 indoor and 60 outdoor measurements were taken for each parameter in each of the three buildings of interest per season, leading to 360 measurements per season and 1440 measurement per parameter over the one-year period of study across the study area. A hot-wire anemometer was used to measure LAV, whereas the Q-Trak indoor AQ monitor was used in the measurement of Tdb, RH, CO and CO2. Aeroqual AQ monitors were employed in the measurement of O3, SO2, NO2, H2S, NMHCs and VOCs. The Wilcoxon signed ranks test was used to determine differences between indoor and outdoor environments. Significant differences were found between the indoor and outdoor environments for LAV (all three buildings), Tdb (PEH and BMBT), RH (BIOD), O3 (all three buildings), NO2 (all three buildings), CO (all three buildings), CO2 (all three buildings), NMHCs (BMBT and BIOD), and VOCs (all three buildings) (p < 0.05). Linear air velocity, O3, SO2, CO, CO2, and H2S values/concentrations across the indoor/outdoor environments were within the ASHRAE/DEA/WHO guidelines/standards, whereas Tdb, RH and NO2 values/concentrations were not. Air quality in the study area varied with building, with the best AQ across both the indoor and outdoor environments being within the BIOD building, whilst the worst AQ across both environments was encountered in the PEH building. Seasonal differences between buildings were also identified between indoor and outdoor environments among the PEH, BMBT and BIOD buildings (p < 0.008). Across the indoor environment, the winter season was found to be the season with the best AQ, since all the pollutants were found at minimum concentrations. Factors affecting AQ in the study area included thermal comfort, occupant densities, building function, laboratory emissions, renovation activities, generators, vehicular emissions, among others. The best AQ across the outdoor environment occurred during the autumn season, since all the air pollutants were present at minimal concentrations during this time. The best predictors of LAV, Tdb, CO, CO2, NO2, and NMHCs were seasons (R2 = 1.000, p < 0.01). For the parameters RH, H2S, and VOCs, the best predictor was building type (R2 = 1.000, p < 0.01). The indoor and outdoor environment were the best predictors for SO2 (R2 = 0.999, p < 0.01). Ozone had no single predictor that was found to significantly influence its concentration in this study. In relation to an air pollution index (API), generally all pollutant indices fell within the fair, good to very good range when using mean and maxima concentrations, whereas, corresponding NO2 concentrations throughout the study fell within the poor to very poor range (105.660–250.000). University management should take into consideration ventilation in laboratories, occupant densities and location of standby generators and car parks in the management of AQ on the university campus. All heating, ventilation and air conditioning (HVAC) systems need to be upgraded and work in tandem with natural ventilation when having high occupant densities within buildings. Future studies in this sector could incorporate larger sample sizes, be designed as a longitudinal study, and make use of questionnaires and sample more AQ parameters to get a detailed understanding of a university site and its surrounds. / Environmental Sciences / Ph. D. (Environmental Science)