Дисертації з теми "Buildings Environmental engineering"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Buildings Environmental engineering".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Coleman, Keith LaMar. "Building optimization : an integrated approach to the design of tall buildings." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38942.
Повний текст джерелаIncludes bibliographical references (p. 73-75).
There has been much research done on building optimization that deal with the issues within specific individual fields, such as architecture, structural engineering, and construction engineering. However, in practical application these issues must be addressed in a much more holistic manner as building design is becoming much more inclusive. A balance must be made that addresses the constructability and scheduling concerns of the contractor, the enclosure and spatial concerns of the architect, and finally the load-carrying concerns of the structural engineer. What if these issues were considered altogether and integrated more fully into building optimization? These issues and concerns would indubitably result in compromise solutions and tradeoffs that would have to be taken into account. This research will not only investigate and utilize current optimization techniques for the conceptual design of tall buildings, but also introduce a new metric in the dynamic analysis of high rise structures.
by Keith L. Coleman.
M.Eng.
Graham, Mark Christopher. "Design strategies for coupling buildings." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12307.
Повний текст джерелаIncludes bibliographical references (leaves 134-135).
by Mark Christopher Graham.
M.S.
Chok, Kermin 1980. "Lateral systems for tall buildings." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/30135.
Повний текст джерелаIncludes bibliographical references.
The advances in three-dimensional structural analysis and computing resources have allowed the efficient and safe design of increasingly taller structures. These structures are the consequence of increasing urban densification and economic viability. The modern skyscraper has and will thus continue to feature prominently in the landscape of urban cities. The trend towards progressively taller structures has demanded a shift from the traditional strength based design approach of buildings to a focus on constraining the overall motion of the structure. Structural engineers have responded to this challenge of lateral control with a myriad of systems that achieve motion control while adhering to the overall architectural vision. An investigation was carried out to understand the behavior of the different lateral systems employed in today's skyscrapers. The investigation examined the structural behavior of the traditional moment frame, the braced frame, the braced frame with outriggers and finally the tubular structure. The advantages and disadvantages of all schemes were explored from both an architectural and structural efficiency standpoint. Prior to the computer modeling of each lateral system, each scheme was understood from an analytical standpoint to both verify computer results and to illustrate the importance of hand calculations. The study repeatedly illustrated that motion was the governing condition and this led to the proposal of an approach for the design of braced frames.
by Kermin Chok.
M.Eng.
Augé, Laurent J. (Laurent Jacques) 1980. "Structural magnetic induction dampers in buildings." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29332.
Повний текст джерелаIncludes bibliographical references (leaf 49).
This thesis discusses the feasibility of structural magnetic induction dampers for dampening mechanical vibrations in buildings subjected to strong dynamic excitations. The concept of energy harvesting in various fields of engineering is first examined. Then it is applied to the design of magnetic induction dampers in buildings. Various implementations of these dampers are proposed and the related expected performances are estimated. Simulations on buildings modeled as discrete multiple-degree-of-freedom shear beams subjected to earthquakes quantify the results and allow for a comparison of the performances with nonisolated and base-isolated buildings. This study demonstrates the potential efficiency of such dampers for harvesting mechanical energy in buildings and encourages further developments on this topic.
by Laurent J. Auge.
M.Eng.
Gemme, Marie-Claude. "Seismic retrofitting of deficient Canadian buildings." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/51576.
Повний текст джерелаIncludes bibliographical references (p. 74-77).
Many developed countries such as Canada and the United States are facing a significant infrastructure crisis. Most of their facilities have been built with little consideration of seismic design and durability issues. As a result, these structures are vulnerable to earthquake loadings and are in urgent need of repair and retrofit. This thesis provides a literature review of the vulnerability of Canadian infrastructures built prior to the development of seismic design provisions in actual codes of practice and standards. It describes the performance of typical structures under earthquake loading, such as unreinforced masonry buildings, flat slab concrete buildings and steel frame buildings. It then presents the most common retrofitting strategies applicable to low-rise buildings commonly found in major Canadian cities. A case study assessing the performance of hybrid base isolation systems is then presented. The performance of passive and semi-active hybrid base isolation system is evaluated through the use of a SIMULINK computer model of a typical two-story concrete frame building. A significant reduction in interstory displacement is achieved using the passive system and further reduction in base displacement and base shear is accomplished using the semi-active system.
by Marie-Claude Gemme.
M.Eng.
Abboud, Klink Boutros Sami. "Motion-based design methodology for buildings." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/33261.
Повний текст джерелаGianferante, Nicholas F. (Nicholas Frank) 1964. "The application of photovoltaics for buildings." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80151.
Повний текст джерелаIncludes bibliographical references (leaves 83-84).
by Nicholas F. Gianferante.
M.Eng.
Abboud, Klink Boutros Sami. "Motion-based design methodology for buildings." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/41325.
Повний текст джерелаIncludes bibliographical references (leaves 131-132).
by Boutros Sami Abboud Klink.
M.S.
Malmqvist, Tove. "Methodological aspects of environmental assessment of buildings." Doctoral thesis, KTH, Miljöstrategisk analys, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9742.
Повний текст джерелаUtvecklingen av verktyg för miljöbedömning av byggnader är ett område som expanderat kraftigt sedan 1990-talets början. Den ökande medvetenheten om den byggda miljöns omfattande bidrag till samhällets miljöpåverkan i stort har spelat stor roll för denna utveckling. Verktygen förväntas ha en betydelsefull roll i att driva på och underlätta miljöförbättringar och omdaning av marknaden i bygg- och fastighetssektorn. Denna avhandling utforskar olika metodaspekter för verktygsutveckling och bygger på erfarenheterna från två stora svenska metodutvecklingsprojekt för miljöbedömning av byggnader, EcoEffect och ByggaBo:s miljöklassning av byggnader. Båda dessa verktyg togs fram i samarbete med ett stort antal representanter från bygg- och fastighetssektorn, då verktygen syftade till praktisk användning. Ett antal metodaspekter utforskas och diskuteras i avhandlingen. I artikel 3 föreslås och testas ett angreppssätt för systematiskt urval av miljöaspekter som ska bedömas av ett verktyg och dessutom föreslås här och i artikel 2 ett systematiskt tillvägagångssätt för att välja indikatorer för praktiskt användning utifrån både teoretiska (t ex. validitet) och praktiska (t ex. kostnad) kriterier. Ett angreppssätt för att underlätta kommunikation av komplexa miljöbedömningsresultat presenteras genom exempel från 26 flerfamiljshus i artikel 4. Detta angreppssätt möjliggör att redovisa en byggnads ‘miljöeffektivitet’ i ett diagram utan att behöva vikta de två disparata miljöaspekterna energianvändning och innemiljö. Artikel 5 tar upp användning av miljöindikatorer för internt arbete i fastighetsförvaltande organisationer genom litteraturöversikter inom områdena utvärdering av miljöprestanda och organisationsteori samt genom jämförelser med praktiska fallstudier. Verktygen EcoEffect (artikel 1) och nuvarande version av ByggaBo:s miljöklassningssystem sammanfattas också och jämförs i avhandlingen. Genom ett antal fallstudier av verkliga byggnader och erfarenheterna från EcoEffect- och ByggaBo-projekten utvärderas frågor som insamling av indata, beräkningsmetoder och olika praktiska tillämpningar i avhandlingen. Dålig tillgång på indata begränsar ibland möjligheterna att göra miljöbedömningar. Förbättrade interna rutiner samt utveckling av nya typer av databaser inom bygg- och fastighetssektorn kommer med största sannolikhet att underlätta miljöbedömningar i framtiden. Granskning av ett stort antal miljöindikatorer i artikel 3 (och 2) och litteratur på området visade att när miljöindikatorer och miljöklassningsmetoder tagits fram, har miljörelevansen hos dessa sällan haft högsta prioritet. Ett övergripande mål för denna avhandling har därför varit att bidra med rekommendationer som kan stärka miljörelevansen och trovärdigheten hos liknande indikatorer och verktyg. Några av de angreppssätt som föreslås är tillämpliga mer generellt också för andra typer av miljöbedömningar; t ex. hur miljörelevanta miljöindikatorer kan väljas, hur både teoretiska och praktiska överväganden kan hanteras på ett systematiskt sätt vid liknande verktygsutveckling, angreppssätt för viktning och aggregering av resultat samt användning av ett livscykelperspektiv. Vid miljöbedömning av byggnader bör också funktionsbaserade indikatorer i första hand väljas snarare än sådana som baseras på specifika tekniska utföranden. En trolig utveckling är att nya typer av användare i större utsträckning kommer att efterfråga den information som miljöbedömningsverktyg för byggnader kan tillhandahålla. Det kan handla om t ex. myndigheter, husköpare och ekonomiska incitamentsgivare såsom banker. Av denna anledning är de frågor som rör metodutveckling och tas upp i avhandlingen, klart betydelsefulla för att stärka noggrannhet, robusthet och trovärdighet i framtida utveckling av miljöbedömningsverktyg för byggnader.
QC 20100601
Miljöklassning av byggnader
EcoEffect - miljövärdering av byggnader
Miljöstyrning med miljöindikatorer i fastighetsförvaltning
Cheung, Po-leung Alan, and 張寶樑. "Improvement of building legislation to include environmental design incommercial buildings of Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31254858.
Повний текст джерелаRostek, Mateusz. "Constructing steel modular buildings with varying interconnections." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119321.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 86-88).
Modular construction uses prefabricated building components called modules, which are fabricated in a factory, transported to a site, and then assembled together to create a building. A "module" is one of the building blocks used to construct a modular building and may be comprised of a load bearing structure, MEP components, interior finishes, and exterior cladding. This alternate way of building using prefabricated units leads to advantages such as: faster construction, cost savings, and sustainability benefits. Historically, modular construction has predominantly been used in the development of low rise, temporary, or portable buildings. However, recently this prefabricated building technology has spread into multi-story applications and a wider range of building types such as hospitals, residential complexes, and schools. As more high-rise buildings are being built using modular construction, new structural challenges must be addressed. Lateral and gravity loads increase with height and the design of building connections and their lateral force resisting systems becomes ever more critical. Although several case studies describing modular buildings are publicly available, there is a lack of detailed scientific data explaining their structural performance. This thesis attempts to shorten the knowledge gap by investigating the effect interconnections have on the behavior of a modular building. In this study modular interconnections are defined as the connections within modular buildings which link discrete modules together allowing them to act as a single structure. Modular interconnections are a keen area of interest as their design affects the global behavior of a modular building. To understand the effect different interconnections have on the stability of a modular building, a study is conducted where several building prototypes with various interconnections are modelled and analyzed.
by Mateusz Rostek.
M. Eng.
Zheng, Ming M. Eng Massachusetts Institute of Technology. "Modal pushover analysis for high-rise buildings." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82829.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 50).
Pushover analysis is a nonlinear static analysis tool widely used in practice to predict and evaluate seismic performance of structures. Since only the fundamental mode is considered and the inelastic theorem is imperfect for the conventional pushover analysis, a modified Modal Pushover Analysis (MPA) is proposed by researchers. In this thesis, the theories of dynamics for single-degree-of-freedom (SDOF) and multiple-degree-of-freedom (MDOF) are introduced, including elastic analysis and inelastic analysis. The procedures and equations for time history analysis, modal analysis, pushover analysis and modal pushover analysis are discussed in detail. Then an 8-story height model and a 16-story height model are established for analysis. The pushover analysis is conducted for each equivalent SDOF system, and by combination of the distribution of 1 mode, 2 modes and 3 modes, the responses of modal pushover analysis are obtained. The results of pushover analysis and modal pushover analysis are compared with those of time history analysis. The results of the analysis show that the conventional pushover analysis is mostly limited to low- and medium-rise structures in which only the first mode is considered and where the mode shape is constant. The modal pushover analysis is shown to have a superior accuracy in evaluation of seismic demands for higher buildings, especially for story drift ratios and column shears. With this in mind, some design recommendations and areas of future work are proposed in the conclusion.
by Ming Zheng.
M.Eng.
O'Neill, Jeremiah C. (Jeremiah Charles). "Application of damping in high-rise buildings." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34589.
Повний текст джерелаIncludes bibliographical references (;eaf 60).
The outrigger structural system has proven to be an efficient lateral stiffness system for high-rise buildings under static loadings. The purpose of this thesis is to research the incorporation of viscous dampers into the outrigger system to improve the dynamic performance. This study will be conducted on a typical high-rise structure in Boston, MA in attempt to find realistic results. This thesis will utilize two analysis models for the study: a simplified single degree of freedom model and a more sophisticated computer model constructed with the structural analysis software, SAP2000. The models will be used to assess the effect that increasing damping or changing damper locations has on the dynamic performance of the structure. Furthermore, the constructability issues of each damping configuration will be identified and discussed.
by Jeremiah C. O'Neill, Jr.
M.Eng.
Steyer, Marc A. (Marc Andrew) 1978. "Multifunctionality of distributed sloshing dampers in buildings." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84834.
Повний текст джерелаKordahi, Ray Z. (Ray Zahi) 1979. "Underpinning strategies for buildings with deep foundations." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29413.
Повний текст джерелаIncludes bibliographical references (leaf 54).
Nowadays, numerous underpinning methods are available to provide safe, fast and practical solutions to nearly any geotechnical problem related to the foundations of a structure. This paper discusses these techniques with an emphasis on grouting and micropiling underpinning systems. Furthermore, some practical case studies such as the current Boston Central Artery Project (Big Dig), where these techniques were adopted, are presented showing the main stages of their construction execution and their main advantages and disadvantages.
by Ray Z. Kordahi.
M.Eng.
Wathier, Claire-Marine. "Probabilistic evaluation of flood damage in buildings." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90033.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (page 77).
Because the ocean level keeps rising and because hurricanes and storms become increasingly destructive in terms of damage and economic loss, the built environment has become very vulnerable to floods. Every city is building a resilient plan to decrease its vulnerability. However, the studies are often reduced to case studies and if engineers manage to build smarter, to upgrade or strengthen existing systems, they do not necessarily evaluate accurately their effect on damage. This is why this thesis starts by identifying the key factors that define and impact flood damage, then defining other parameters that are more oriented towards resilience. Based on these considerations, a probabilistic evaluation of flood damage in buildings can be conducted and the sensitivity of each parameter is evaluated in order to reduce the total loss. Then a new objective becomes to find how modifying parameters, and consequently the structure, leads to less damage without losing its cost-effectiveness. The first thesis' aim was to evaluate flood damage on buildings. However, building's damage is more diverse than expected and evaluating flood damage effect turns out to be actually only the beginning in the process of resilience.
by Claire-Marine Wathier.
M. Eng.
Wu, Tai-Chieh 1976. "Design of base isolation system for buildings." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84293.
Повний текст джерелаLaub, Errol (Errol Jonathan) 1976. "Design methodologies for controlling vibrations in buildings." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/33824.
Повний текст джерелаIncludes bibliographical references (leaves 44-45).
Although vibration absorbers have been employed in mechanical equipment mounting for over 100 years, they have only recently been used for isolating large-scale structures such as bridges and buildings. Their applications range from acoustic to seismic isolation of structures. Virtually any vibration magnitude can be prevented from degrading the performance of a structure. This thesis is intended to provide a practical introduction to the design and suitability of vibration isolators for various environments. It contains a discussion of the past, present and future of vibration isolation associated with buildings. Analysis and design examples are provided to illustrate the design methodology.
by Errol Laub.
M.Eng.
Park, Daekwon. "Multiscale Thermal Design for Buildings." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:30499027.
Повний текст джерелаSpanos, Ioannis. "An Engineering Design Approach to the Energy and Environmental Management of New Buildings." Thesis, Coventry University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492376.
Повний текст джерелаJoelsson, Anna. "Primary energy efficiency and CO2 mitigation in residential buildings." Doctoral thesis, Mittuniversitetet, Institutionen för teknik och hållbar utveckling, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-7865.
Повний текст джерелаSettlemyre, Kevin (Kevin Franklin) 1971. "Operational, aesthetic, and construction process performance for innovative passive and active solar building components for residential buildings." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9102.
Повний текст джерелаIncludes bibliographical references (leaves 295-300).
A system-based framework creates the ability to integrate operational, aesthetic, and construction process performance. The framework can be used to evaluate innovations within residential construction. By reducing the constraints for use, the framework is adaptable and flexible to specific projects and to the alternatives developed by the user. Passive and active solar design strategies are brought together in the creation of the Energy Producing Wall (EPW) components. Two component types, EPW1 & EPW2, can be adapted to create five different panel types. These units can be installed on the roof or vertical walls, and provide the innovative subject for evaluation within the framework. Four alternatives within two prototype homes, located in two climates, were analyzed to represent the existing and potential stock of housing and to provide the source of input data into the framework. An adaptable spreadsheet analysis, based on past and current analytical methods, establishes the EPW's potential benefit on the heating, cooling, electricity and total energy consumption loads within the prototype designs . Visualization models combined with physical models assess the aesthetics. The development of a Dynamic Process Model for Light Wood Framing (DPM-LWF) represents the framing construction process for the prototype designs, and provides time and cost impacts of the EPW alternatives. The. results from each analytical tool are combined to analyze the impacts of implementation, case results and sensitivities within the cases. A 'case result format' presents the results of the multiple alternatives for direct comparison, and can guide further investigations and information within the document. The EPW components demonstrated a 95% benefit for the electrical load of the "Modern Design" in Phoenix (currently), and the potential to reach over 100% benefit of the heating load in Boston for the "Sears Design."
by Kevin Settlemyre.
S.M.
Besing, Christa 1978. "The retrofitting of existing buildings for seismic criteria." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/30137.
Повний текст джерелаIncludes bibliographical references (leaves 52-53).
This thesis describes the process for retrofitting a building for seismic criteria. It explains the need for a new, performance-based design code to provide a range of acceptable building behavior. It then outlines the procedure for retrofitting a building. This procedure begins with acquiring information about the existing building and its surroundings. The building owner or client then needs to work with the design professional to establish an acceptable performance level, or rehabilitation objective. A rehabilitation method must then be selected that determines how the building should be analyzed. The analysis of the building, including suggested rehabilitation strategies, must then be performed. Once the analysis indicates that the building will perform to its prescribed performance level, the rehabilitation strategies must then be implemented. The thesis ends with a description of two buildings that have recently been retrofitted, or are in the processes of being retrofitted. It gives an overview of the selected rehabilitation strategies and the reasoning behind their selection.
by Christa Besing.
M.Eng.
Gamaniouk, Taras. "Parametric analysis of progressive collapse in high-rise buildings." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89848.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 53).
Progressive collapse has become a topic of interest in recent years leading to a greater focus on the resilience of structures. The propagation of a local failure can become catastrophic and lead to multiple deaths, injuries and destruction of property. These types of events have been predominant in mid to high-rise buildings under both accidental and intentional circumstances. The dire consequences associated with these types of buildings have fueled research efforts into preventative measures for progressive collapse. Three main design methods have been implemented for the design of progressive collapse: tie forces, enhanced local resistance and alternate load path. Each method features its own advantages and disadvantages; however, the alternate load path is currently the preferred procedure as it is accurate and capable of dealing with complex systems. This method is investigated in detail with a specific focus on nonlinear dynamic analysis. The technique is applied for three different structural systems which are commonly used for high-rise buildings: moment frames, braced frames and truss tube systems. A variety of 2D structural models are analysed for their performance under progressive collapse conditions with variable building parameters. The results of the investigation infer that taller buildings are inherently better at preventing progressive collapse as the load is diminished throughout the building allowing less plastic hinges to form. This result was common in all three structural models with the braced frames exhibiting a better structural response to local failure in comparison to moment frame buildings. The study identifies the advantage of implementing hybrid structural frames for the prevention of collapse in high-rise buildings. Integration of moment frames for the lower stories of buildings is shown to be an effective mitigation method for progressive collapse.
by Taras Gamaniouk.
M. Eng.
Tzonev, Tzonu. "Seismic retrofit of precast panel buildings in Eastern Europe." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82720.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 85-87).
Many countries in Eastern Europe, particularly ones from the former Soviet Bloc, are facing a potential crisis regarding their deteriorating precast panel apartment buildings. These complexes were built using industrial methods in response to the housing shortage during the 1960s, 70s and 80s. An ending lifecycle in combination with the poor design and construction quality makes these buildings extremely vulnerable to earthquakes that are frequent in the region. This thesis addresses the need to act urgently in order to rehabilitate these structures and ensure that they meet today's building code requirements. It is achieved through a case study that explores the effectiveness of global bracing seismic mitigation techniques on an existing precast panel building located in Sofia, Bulgaria. The in-situ building is first analyzed using SAP2000 and then again after the bracing is added to the model. A variety of parameters such as drift, floor acceleration and seismic damage are compared with cost and plausibility of the chosen options. As a final outcome, the external bracing scheme used in this study does in fact decrease both the floor accelerations and the interstory drift by at least 10% and in some cases as much as 85%. During the thesis, several local experts and practicing structural engineers were interviewed and consulted. For this study it is assumed that the building has a close statistical representation of other buildings with similar structural system both in Bulgaria and neighboring Eastern European countries.
by Tzonu Tzonev.
M.Eng.
Acuña, Maria Isabel 1971. "Reducing time in the construction of high rise buildings." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/80646.
Повний текст джерелаGerasimidis, Symeon. "Application of knee-bracing system on high-rise buildings." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35079.
Повний текст джерелаIncludes bibliographical references (leaf 60).
The need and ambition of humanity to go higher and higher is something that is amplified as time evolves. It is the same need that leads engineers to push their structures to higher limits. However, when engineers design higher structures their knowledge and their abilities are challenged. In that sense, during the design process of a high-rise building all the strange phenomenon of the behavior of the structure must be considered. A very significant factor that affects the limits of today's high-rise construction is the wind loading. Bracing the building in a clever and more efficient way was always a difficult task for designers and engineers. This thesis deals with a bracing system called the knee-bracing system. The application of knee-bracing system for high-rise buildings is not yet fully determined and this study will try to describe the problem and provide some solutions. Knee-bracing will be checked and the possibility of providing the required results using the minimum amount of material and giving the maximum space for use from the residents or workers of the building will be examined.
(cont.) Several different cases of loading and knee-bracing systems are considered and an optimization for the design of such systems is described. The last part of the document describes the idea of adaptive stiffness, something new for high-rise buildings. Reinforcing these ideas, solutions for the construction of these bracings are also provided.
by Symeon Gerasimidis.
M.Eng.
Collinge, William O. "A dynamic life cycle assessment framework for whole buildings including indoor environmental quality impacts." Thesis, University of Pittsburgh, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3573266.
Повний текст джерелаLife cycle assessment (LCA) can aid in quantifying the environmental impacts of whole buildings by evaluating materials, construction, operation and end of life phases with the goal of identifying areas of potential improvement. Since buildings have long useful lifetimes, and the use phase can have large environmental impacts, variations within the use phase can sometimes be greater than the total impacts of other phases. Additionally, buildings are operated within changing industrial and environmental systems; the simultaneous evaluation of these dynamic systems is recognized as a need in LCA. At the whole building level, LCA of buildings has also failed to account for internal impacts due to indoor environmental quality (IEQ). The two key contributions of this work are 1) the development of an explicit framework for DLCA and 2) the inclusion of IEQ impacts related to both occupant health and productivity. DLCA was defined as “an approach to LCA which explicitly incorporates dynamic process modeling in the context of temporal and spatial variations in the surrounding industrial and environmental systems.” IEQ impacts were separated into three types: 1) chemical impacts, 2) nonchemical health impacts, and 3) productivity impacts. Dynamic feedback loops were incorporated in a combined energy/IEQ model, which was applied to an illustrative case study of the Mascaro Center for Sustainable Innovation (MCSI) building at the University of Pittsburgh. Data were collected by a system of energy, temperature, airflow and air quality sensors, and supplemented with a postoccupancy building survey to elicit occupants’ qualitative evaluation of IEQ and its impact on productivity. The IEQ+DLCA model was used to evaluate the tradeoffs or co-benefits of energy-savings scenarios. Accounting for dynamic variation changed the overall results in several LCIA categories—increasing nonrenewable energy use by 15% but reducing impacts due to criteria air pollutants by over 50%. Internal respiratory effects due to particulate matter were up to 10% of external impacts, and internal cancer impacts from VOC inhalation were several times to almost an order of magnitude greater than external cancer impacts. An analysis of potential energy saving scenarios highlighted tradeoffs between internal and external impacts, with some energy savings coming at a cost of negative impacts on either internal health, productivity or both. Findings support including both internal and external impacts in green building standards, and demonstrate an improved quantitative LCA method for the comparative evaluation of building designs.
Buntrock, Rebecca (Rebecca Miriam). "Structural performance of early 20th century masonry high rise buildings." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60760.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 65-67).
Early generation high rise buildings built between 1890 and World War 11 represent a technical transition between traditional load bearing masonry construction and modern curtain wall systems, and are typically referred to as 'transitional masonry buildings'. These structures comprise a large percentage of the building stock constructed in the early twentieth century. Two pertinent issues have emerged with these structures as they age. The first is the deterioration of the exterior masonry facade, which is largely a result of deficiencies in the construction method of these structures. The second issue is that it is very difficult to properly predict their structural performance because of the complicated interaction between the masonry infill and the structural frame. Underestimating or misdiagnosing the structural performance of a transitional masonry building can result in improper interventions. The aim of this thesis is to increase the understanding of the structural and facade performance of transitional masonry buildings and present methods for their analysis. A case study of a transitional masonry building is structurally analyzed using linear and nonlinear procedures to determine the contribution of the masonry infill as well as to investigate the feasibility of using simplified analytical models to predict structural performance.
by Rebecca Buntrock.
M.Eng.
Cook, Jason A. (Jason Andrew). "Structural steel framing options for mid- and high rise buildings." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34634.
Повний текст джерелаIncludes bibliographical references.
Selecting a structural system for a building is a complex, multidisciplinary process. No design project is the same; however, there are certain criteria that are commonly true in the initial phase of evaluating different structural schemes. These criteria encompass all aspects of a full, functioning building, forcing the design team to be creative in their approach of satisfying all facets. An investigation was carried out for several structural steel framing options available to designers. The schemes describe how each successfully resist lateral loads explaining the advantages and disadvantages of each. Many of the structural design tools available for initial structural system evaluation are strength based. The demand for cheaper, more efficient and taller structures has paved the way for performance based design. A simple cantilever beam performance based analysis was utilized to evaluate three common structural framing schemes in order to gain a better understanding of the performance of each. Results give recommendations for efficient structural solutions for proposed buildings as a function of height.
by Jason A. Cook.
M.Eng.
Gamaliel, Renard. "Frequency-based response of damped outrigger systems for tall buildings." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43899.
Повний текст джерелаIncludes bibliographical references (leaf 77).
The outrigger structural system for tall buildings is known to be effective in reducing lateral drift under quasi-static wind loading. Although keeping lateral deflection below the required value is certainly important, it is found that in most tall buildings without supplementary damping, the design for stiffness is usually governed by occupant comfort under lateral acceleration. This thesis describes the concept of incorporating fluid viscous dampers in the outrigger system to add supplementary damping into the structure. A 40-story building installed with the variant outrigger system is analyzed for dynamic response due to wind effects such as buffeting and vortex shedding. By constructing an 80-dof discrete lumped mass model, and using a frequency-based response approach, two configurations of dampers, namely series and parallel damping are studied in detail. The effect of increasing damper size to overall achievable building damping is monitored for both configurations. Additionally, design and constructability issues with regards to the implementation of the systems are discussed.
by Renard Gamaliel.
M.Eng.
Wasef, Abram. "Serviceability-based design of tall buildings subjected to vortex shedding." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99626.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 95-97).
With the increasing rate of population, there is an increase in demand for housing for people and their families. Due to the limited amount of land space, one of the most viable and feasible solutions is increase the number and height of residential and office buildings leading to a requirement of having a special design for these tall buildings. Due to the advancement of technology leading to an increase in the strength of materials used in construction, these types of buildings can be built. This leads to lesser amounts of materials used and resulting in lightweight structures that are flexible. As the height of the buildings increases, these lightweight structures become more flexible making them susceptible to excessive wind-induced motion. Although there are multiple factors that govern serviceability in tall buildings, it has been deduced from the literature, that acceleration is a very important factor, and that as the level of acceleration increases, people become more uncomfortable. Moreover, across wind response caused mainly due to vortex shedding becomes a very important phenomenon that needs to be dealt with, and which also contributes a significant amount of acceleration on the building. Acceleration due to vortex shedding is the focus of this thesis. To determine a solution, information on factors affecting serviceability of tall buildings, how increasing effects of these factors would affect occupants, and how current standards and codes deal with serviceability requirements were obtained. Using this information, a methodology similar to the Pacific Earthquake Engineering Research Center (PEER) criteria was developed to determine the relationship between these different factors. All of these factors were incorporated in different cost functions and combined together to evaluate the serviceability of tall buildings over their lifetime from an economical perspective. A flexible parametric approach was used to analyze how varying the level of damping, stiffness and the negative effects due to wind-induced acceleration will affect the cost of tall buildings. Moreover, a detailed example was presented to show how the methodology works by analyzing the CAARC Building. Also, the analysis includes varying the location by applying the methodology to three different states to determine how stiffness and damping changed.
by Abram Wasef.
M. Eng.
Martin, Eric Russell 1971. "Understanding the diffusion of energy efficiency technology in residential buildings." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/41422.
Повний текст джерелаSilbiger, Jason Stahl. "Schematic design of distributed mass damping systems for tall buildings." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89868.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 75-77).
As new high-rises grow taller and more slender, the design of tall buildings becomes heavily constrained by the control of lateral displacements and accelerations due to dynamic excitations. This has led to the development of motion control devices, such as the Tuned Mass Damper (TMD) and Tuned Liquid Column Damper (TLCD). Contemporary designs implement devices where the dynamic response is the greatest, often at the top of buildings, occupying entire floors and inhibiting the sale of valuable real estate. Conversely, distributed damping is the concept of dividing the dampers into smaller devices that are placed on several floors throughout the building. Although a greater total mass is required, implementing smaller dampers and using less valuable floor area may be advantageous for buildings with a substantial cost variation between floors. This study presents a methodology where the optimal vertical distribution of TMDs and TLCDs is determined based on the footprint and relative cost of each damping scheme. To perform this analysis, the governing equations for a distributed damping system are developed and its response is derived assuming a periodic excitation. Given the structural properties and performance requirements of the building, a one TMD system is designed using the conventional approach. Ranging through several distribution schemes, the damper mass required for each distribution to meet the same acceleration performance as the one TMD system is determined. This mass is used to calculate the damper footprint for TMD and TLCD systems. From the cost distribution of the building, the relative cost of each scheme may be calculated and compared. Depending on the objective of the designer, the minimum damper footprint or minimum cost scheme may be selected as the optimal distribution. The methodology was demonstrated for 60, 80, 100, and 120-story buildings. It was observed that buildings with approximately half of the floors installed with dampers correspond to the minimum footprint scheme, while the minimum cost scheme was dependent on the building's size constraints and cost distribution. For buildings with significant cost variation in upper floors, distributed damping is not only the least cost solution, but also leads to conveniently small devices.
by Jason Stahl Silbiger.
M. Eng.
Zhang, Yu S. M. Massachusetts Institute of Technology. "Shear wall layout optimization for conceptual design of tall buildings." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111421.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 105-106).
In the design of tall buildings, the lateral system that resists wind and seismic loading usually dominates the structural engineering effort; therefore, optimal lateral system design is important for material efficiency. In a shear-wall-based building, the conventional design process starts with an architect generating a floor plan, which is then passed to a structural engineer, who, based on knowledge and prior experience, tries to place shear walls to balance conflicting requirements: minimum structural weight, satisfactory structural strength and serviceability, conformity to architectural layout. This design process can be slow and inefficient, requiring a trial-and-error approach that is unlikely to lead to the best solution. The work presented in this thesis intends to accelerate the process with an optimization system involving a ground structure program formulation, a modified evolutionary algorithm, and innovative computational techniques. Unlike existing work that focuses either exclusively on structural performance or architectural layout, this research integrates both. An efficient computational design methodology for shear wall layout in plan is introduced. The method minimizes structural weight with constraints on torsion, flexural strength, shear strength, drift, and openings and accessibility. It can be applied from the very beginning of floor plan design or after generating an architectural floor plan. This thesis demonstrates the potential of this approach through a variety of case studies. Key contributions include a novel application of the ground structure method, a fast and robust modified evolutionary algorithm, and a simplified auto-calculation system for reinforced concrete design.
by Yu Zhang.
S.M. in Transportation
Sheppard, Barbara Dorothea. "Assessing the environmental performance of building developments : the Green Building Tool." Title page, table of contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09ENV/09envs549.pdf.
Повний текст джерелаZingano, Bernard Wilson. "Effects of solar radiation on buildings and thermal comfort." Thesis, University of Hertfordshire, 2003. http://hdl.handle.net/2299/14151.
Повний текст джерелаFleming, Cody Harrison. "A design methodology for hysteretic dampers in buildings under extreme earthquakes." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28363.
Повний текст джерелаIncludes bibliographical references (leaves 64-65).
This research proposes a design methodology for hysteretic dampers in buildings under high levels of seismic hazard. Developments in structural materials have led to designs that satisfy strength requirements but are often very flexible. This trend, along with increasingly stringent building performance criteria, suggests a philosophy of controlling structural motion as opposed to merely designing for strength, particularly when related to earthquake design. Included in this thesis is a design algorithm that calibrates stiffness and yield force level, two controlling parameters in the implementation of hysteretic dampers, in order to obtain optimal structural response under two levels of earthquake severity. In addition, a parametric study illustrates the merits and drawbacks of various stiffness and yield force allocations.
by Cody H. Fleming.
M.Eng.
Gaïsset, Ines (Ines Sophie Maya). "Designing buildings for disassembly : stimulating a change in the designer's role." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66828.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 61-63).
Today's industrial infrastructure in the building field results in specific types of problems with current design strategies. Here, the potential of Design for Disassembly (DfD) is explored as a solution for a new type of architecture that allows for both recyclability of material and space. Particular attention is given to the benefits that result from this new way of designing while beginning the process of an industrial re-evolution. Indeed, if environmental and health impacts are the most obvious benefits, indirect effects such as questioning the boundary between the designer and the user should not be neglected. In addition, projects built with DfD methods are being analyzed. The studies range from houses that can expand in the longitudinal plan to houses that can be entirely customized. To further explore DfD methods, experiments based on digital fabrication technologies such as CNC, Water Jet Cutting and rapid prototyping are considered. Finally, conclusions as to how Design for Disassembly can stimulate a change in the designer's role in the building field, and recommendations on how to encourage the implementation of such an innovative and responsible design method are proposed.
by Ines Gaïsset.
M.Eng.
Spencer, Emily D. (Emily Deen). "Seismic assessment of unreinforced masonry buildings in Boston's Back Bay neighborhood." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99634.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 70-72).
This thesis presents a seismic evaluation of the unreinforced masonry buildings in Boston Massachusetts's historical Back Bay neighborhood. This Boston district, famous for its rows of Victorian brownstone residences is considered to be one of the best preserved examples of 19 'h century urban design. There are a few specific reasons to speculate at the vulnerability of this neighborhood to seismic events. First, in 1755, one hundred years before the Back Bay started to be built, the most massive earthquake of New England's history occurred, damaging unreinforced masonry structures in Boston. Approximately eighty percent of the Back Bay neighborhood is now made up of unreinforced masonry structures. Second, seismic design was not required in Boston until 1975, which means a staggering majority of the buildings in the Back Bay were constructed without any kind of anti-seismic lateral system. The aim of this thesis is to assess the structural response of the unreinforced masonry homes of the Back Bay to seismic activity due to these issues. A case study of an unreinforced masonry building in the neighborhood is assessed through structural analysis of its facade and party walls. The performance of this building is extrapolated to represent the state of the unreinforced masonry buildings of the Back Bay.
by Emily D. Spencer.
M. Eng.
Kuo, Chuan-Hua. "Impact of cladding on mid-rise buildings in the Northridge Earthquake." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/51570.
Повний текст джерелаIncludes bibliographical references (p. 58-59).
In this thesis, the importance of cladding panels on mid-rise buildings in an earthquake-prone region is investigated. A cladding panel acts as a protective or an insulating layer to control weather infiltration. The Northridge Earthquake, which took place on January 17, 1994, caused numerous heavy cladding panels to fall off the walls of residential and commercial buildings. The failure of these panels was a result of an insufficient understanding of the cladding behaviors as a subsystem in the three-dimensional framing system. Cladding is designed to be isolated from the structural frame movement during an earthquake. However, numerous studies have concluded that cladding interacts with the structural frame in providing lateral resistance. The advantages and disadvantages of different cladding materials, cladding systems, and cladding connections are presented in this thesis. The effects of cladding on mid-rise buildings in the Northridge Earthquake in the Los Angeles area are simulated in this study. Motion resistance contributed from cladding in a particular mid-rise building, a 19-story office building in downtown Los Angeles, is investigated. Analyses of clad models and unclad models are carried out, and clad models are discovered to displace less than unclad models. Therefore, cladding is able to contribute lateral motion resistance to a building during an earthquake, and structural engineers should include cladding in their analysis models when designing a building.
by Chuan-Hua Kuo.
M.Eng.
Gu, Wenjia M. Eng Massachusetts Institute of Technology. "Trends and innovations in high-rise buildings over the past decade." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99597.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 48-49).
Over the past decade, high-rise buildings in the world are both booming in quantity and expanding in height. One of the most important reasons driven the achievement is the continuously evolvement of structural systems. In this paper, previous classifications of structural systems are summarized and different types of structural systems are introduced. Besides the structural systems, innovations in other aspects of today's design of high-rise buildings including damping systems, construction techniques, elevator systems as well as sustainability are presented and discussed. To better understand current high-rise buildings, information about buildings above 200 meter completed within recent ten years and the current 100 tallest building in the world is collected and analyzed. Structural systems of worldwide 100 tallest buildings are discussed, from which trends are found. Data shows that tubular systems are in vast majority in recent high-rise building designs and an increasing number of buildings are using concrete and composite materials instead of steel. Developments in structural systems also reduce structures' dependence on auxiliary damping devices. Additionally, sustainability has been given more and more consideration.
by Wenjia Gu.
M. Eng.
Murray, Nicholas S. (Nicholas Stephen) 1977. "Applicability of high strength concrete for buildings in active seismic regions." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84268.
Повний текст джерелаGupta, Siddharth S. M. Massachusetts Institute of Technology. "Estimating the presence of people in buildings using Call Detail Records." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111437.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 92-97).
As geographic data about individual movement become increasingly available, they open LIP the possibility of understanding and modeling urban mobility patterns. While no all-encompassing dataset regarding mobility is available, this study explores how Call Detail Records (CDRs), a highly ubiquitous dataset, can be leveraged to create models that can reproduce mobility patterns observed from time consuming, capital-intensive and infrequent travel surveys. While mechanisms have been proposed for reproducing particular characteristics of individual mobility, this is the first attempt to generate all mobility patterns at fine spatial and temporal scales at the level of individual buildings. Two shortcomings of any dataset include spatial uncertainty at very high resolution and the presence of high-fidelity traces for only a fraction of the population. While the proposed model addressed the former to some extent by providing high accuracy counts at the level of census tracts, a separate method has been explored to address this along with the latter phenomenon. To achieve this, the study leverages hyper-local datasets such as building footprints and places of interest. In the absence of primary datasets, the study is able to provide a model to estimate of the presence of people at the level of individual buildings. Hence, this study provides a pipeline to proceed from high fidelity location traces from a fraction of the population to building level occupancy profiles using fairly ubiquitous data sources.
by Siddharth Gupta.
S.M. in Transportation
Kawar, Alexandra(Alexandra Alba). "Comparative study of bracing patterns and materials for tall timber buildings." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127286.
Повний текст джерелаCataloged from the official PDF of thesis.
Includes bibliographical references (pages 77-81).
Exploration of new designs for urban environments is increasingly focusing on reducing carbon emissions generated by construction and operation of tall buildings. With recent technological advances in timber construction and its potential to mitigate the carbon embodied in structural materials, tall timber buildings are gaining acceptance as various forms are considered for their designs. Recently built and proposed buildings demonstrate the use of mass timber to resist gravity and lateral loads. There are inherent efficiencies in placing lateral load resisting systems on the perimeter of a structure along with the possibilities to integrate versatile geometric patterns and effective structural solutions. However, timber material properties may lead to elements of larger volume than those made of steel or concrete. This study compares structural stiffness gains and carbon emission reductions for exterior bracing created in timber and timber-steel hybrid configurations. Numerical analyses are used to explore braced frame geometries and layouts for the steel and timber elements, to predict structural response, and compare the effects of material placement.
by Alexandra Kawar.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Civil and Environmental Engineering
Mikou, Saad. "Mitigation of wind induced movement of buildings using the modified friction device." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66843.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 64-65).
Building higher skyscrapers increases the concern of wind induced motion. Indeed, in order to ensure serviceability and safety standards, it is the engineers' responsibility to investigate the response of high-rise buildings to wind excitation. Tuned mass dampers are usually used to limit the response of the buildings to wind. However, these devices are generally tuned for a particular bandwidth of frequencies. Therefore, in order to improve the effectiveness of these devices, control schemes must be implemented. For this thesis, the design of a modified friction device (MFD) has been studied. Requiring only a small amount of energy, the MFD is a new kind of semi-active damper that provides stability, accurate control and effectiveness. Using a MATLAB program, it was possible to model a primary structure hit by a certain wind excitation. The modified friction device was designed to counterbalance the effects of wind and decrease displacements and accelerations. It was placed on the top of the building where the displacements are generally the highest. The parameters of the MFD were examined, and many simulations were run in order to optimize the action of the device on the mitigation of wind excitation. The results demonstrate that the MFD effectively mitigates wind induced motion in buildings. Therefore, this thesis corroborates the benefits of implementing modified friction devices in civil structures.
by Saad Mikou.
M.Eng.
Leonard, Johan M. Eng Massachusetts Institute of Technology. "Investigation of shear lag effect in high-rise buildings with diagrid system." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39269.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (leaves 43-44).
In the recent years, there have been many new skyscrapers built which soar into new heights. The most efficient building system for high-rises has been the framed tube system. However, the framed tube building suffers from shear lag effects which cause a nonlinear distribution of axial stresses along the face of the building. A particular structural system called a diagrid system has caught the attention of the public. The diagrid system is not a new invention. The idea had been around since 1960 and few buildings have been built with the diagrid system. However, the implementation in a larger scale of such tall building was not practical due to high cost related to the difficult node connections. It is only in recent years that the technology has allowed for more reasonable cost of making the diagrid node connections. Despite becoming the new trend in high-rise structures, there are not many technical publications related to diagrid building system. A recent thesis by Moon (2005) studied the various angles of the diagrid to find optimum angle. He has also reviewed the design considerations for diagrid building. This thesis attempts to build on the study by Moon related to the shear lag effect in diagrid building. Diagrid buildings of different configuration are modeled in SAP2000 and analyzed for shear lag effect and structural performance.
by Johan Leonard.
M.Eng.
Lee, Jooeun S. M. Massachusetts Institute of Technology. "The role of the aerodynamic modifications of the shapes of tall buildings." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66869.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
With the advances in technology, recent tall building design has undergone a shift to the free-style geometric forms in the exuberant and liberal atmosphere. As a height of the building increases, it is more susceptible to vibration caused by wind because of its asymmetric distribution of mass and stiffness, increased flexibility and insufficient inherent damping. This wind-induced motion, in particular crosswind response, endangers the dynamic response of tall structures, the performance of cladding and window, and the habitability of occupants. Therefore, much research on mitigating wind induced excitations of tall buildings has been carried out. This thesis focuses on the effect of shape modification on the wind flow pattern around tall buildings. An appropriate choice of this architectural modification can significantly reduce aeroelastic instabilities. Four aerodynamic modifications to reduce wind-induced responses of a tall building, such as a basic square model, a corner recession model, a 3- step setback model, and a 180 degree helical model, are evaluated through commercial CFD (Computational Fluid Dynamics) software, STAR-CD and compared with results from wind tunnel tests. Based on this comparison, the optimal model to effectively mitigate adverse wind excitations is recommended.
by Jooeun Lee.
S.M.
Chen, Yuan, and 陳源. "An embodied GHG emissions auditing and benchmarking model for assessing the environmental impacts of buildings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195969.
Повний текст джерелаpublished_or_final_version
Civil Engineering
Doctoral
Doctor of Philosophy
Isbiliroglu, Yigit D. "Coupled Soil-Structure Interaction Effects of Symmetric and Asymmetric Buildings In Urban Regions." Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/268.
Повний текст джерела