Teses em Engenharia Civil (Doutorado) - PPGEC/ITEC
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/9887
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Navegando Teses em Engenharia Civil (Doutorado) - PPGEC/ITEC por Orientadores "MAUÉS, Luiz Maurício Furtado"
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Item Acesso aberto (Open Access) Identificação e quantificação de desplacamento cerâmico em fachadas de edifícios no contexto da indústria 4.0(Universidade Federal do Pará, 2023-03-24) SOUSA, Alcineide Dutra Pessoa de; MAUÉS, Luiz Maurício Furtado; http://lattes.cnpq.br/7497951647889934; https://orcid.org/0000-0002-1762-8617The facade maintenance process is guided by the results obtained in the inspection phase. Some proposals for methods aimed at improving the inspection process have been discussed, and among these, those that are conducted based on Digital Image Processing (PDI) techniques captured by Unmanned Aerial Vehicle (UAV) stand out. The use of UAVs to capture images on facades streamlines access to the inspected area, and PDI techniques help to automate the process of identifying pathological manifestations. In addition, the fourth industrial revolution has allowed the use of various technological tools in the most varied engineering applications. Among these technologies we can mention cloud computing and computer vision algorithms. In this context, this research aims to apply PDI techniques to detect regions with ceramic displacement on building facades using technologies relevant to industry 4.0 (fourth industrial revolution). The methodological procedure used starts with the formation of a database (images) captured by cell phone and UAV. For modeling purposes, the YOLO (You Only Look Once) object detection algorithm was applied to the images that make up the database using cloud computing. The applied methodology resulted in a program written in python capable of identifying the regions with displacement, quantifying the missing ceramics and exporting the quantification results in a spreadsheet. The identification process had success rates close to 99% and the quantification errors of less than one ceramic per image, which leads to the conclusion of the feasibility of the proposed computational programItem Acesso aberto (Open Access) Método para capacitação de ocupantes de edifícios residenciais em segurança contra incêndio(Universidade Federal do Pará, 2022-03-24) SARAIVA, Raísse Layane de Paula; MAUÉS, Luiz Maurício Furtado; http://lattes.cnpq.br/7497951647889934; Https://orcid.org/0000-0002-1762-8617Despite the existence of norms, laws and executive orders that provide safety in residential buildings, fires continue to occur in Brazil and worldwide and can be fatal given their severity and provided occupants do not know what to do. This problem becomes even more complex in high buildings (height greater than 30 meters), where fire protection systems are employed, but still there is no – in Brazil – mandatory fire training for occupants. Authors focused on the study of human behavior in fire situations have already stated that the adequacy of responses (or behavior) is the key for the building to be safely abandoned in case of need and to ensure greater safety to the building occupants. In view of the above, this work, through Design Science Research (DSR), aimed to develop a fire training method for occupants of tall residential buildings. The method had two aspects of composition: i) theoretical analysis (where norms, laws, executive orders, good practices and fires already occurred were used as sources of information) and ii) computational simulation (where the hypotheses were tested). As products, a flowchart and a listing of the contents to be used in the training were developed. Then, the method was validated, analyzing the internal validity, external validity, content validity and construct validity. To this end, specialist professionals from the Fire Department, in 12 Brazilian states, answered 42 questionnaires attesting to the validity of the method and considering it appropriate, understandable, objective, replicable and appropriate for the objective to which it was available. In addition to confirming the negative impact of premovement time, it was also possible to verify that the number of occupants in the building, as well as the distances covered by these are extremely important factors in the abandonment process and should be verified in new projects aimed at improving their safety. In addition, three buildings were used for the development of the study and had the training method applied, finally being evaluated by the occupants themselves and training participants, who considered it acceptable and responsible for providing them with more safety.Item Acesso aberto (Open Access) Método para identificação, análise e controle dos fatores de atraso de obras na gestão dos projetos de construção: um estudo baseado na metodologia multicritério construtivista de apoio à decisão (MCDA-C).(Universidade Federal do Pará, 2023-01-26) CARVALHO, André Brasil de; MAUÉS, Luiz Maurício Furtado; http://lattes.cnpq.br/7497951647889934The delay in works is observed globally in civil construction and affects the economy of countries, directly influencing the costs and low quality of works, the occurrence of disputes between the parties and other consequences, such as social issues related to the housing deficit, for instance. Thus, it is essential to identify the causes of work delays to minimize its consequences. In this context, the objective of this work is the elaboration of a method of identification, analysis, and control for the factors of delay of works in the management of construction projects. The research methodology included, first, a systematic review of the literature (RSL); subsequently, a survey was conducted, through questionnaires and interviews, to observe the most frequent causes of work delay, which were also evaluated for their correlations by the statistical technique of factor analysis. In this case, the results showed that the 12 main causes identified are correlated with four factors of delay of works: supply management, labor management, project management and management of weather conditions. Finally, after this first phase of the research and aiming at the development of the proposed model, the Design Science Research (DSR) method was applied in a local project management company, using as a research tool the multicriteria constructivist methodology of decision support (MCDA-C), seeking to carefully examine the decision-making process related to the delay factors observed; that were used as initial parameters in the structuring stage of the MCDA-C method. The results generated were the development and validation of the proposed method, identified as an artifact generated by the DSR, as well as the elaboration of descriptors (performance indicators) for all causes of delay evaluated. Similarly, control recommendations were obtained in the institution's performance in the factors of work delay in question, mainly regarding the management of supplies and project management that did not present satisfactory performances. In this case, it is worth mentioning the changes that occurred in the organization chart and work methodology of thecompany as actions implemented as a result of the process, carried out jointly with the decision-taker. It is concluded, therefore, that the research allowed an in-depth analysis of which issues should be prioritized in the strategies of actions aimed at minimizing the occurrence of delays in the execution of projects in civil construction and that the delay factors identified can be considered as "management deficiencies" of the enterprises.