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 "DUARTE, André Augusto Azevedo Montenegro"
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Item Acesso aberto (Open Access) Bem-estar no trabalho: proposta de uma escala para operários da construção(Universidade Federal do Pará, 2019-10-08) MOREIRA, Felipe de Sá; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973Well-being concepts, which are widespread in the social sciences, are gaining more space and are being worked on in several other areas. Two theories of approach are typically used: subjective well-being through hedonic theory and psychological well-being supported by eudaimonic theory. Based on these theories the field of study called well-being at work (WBW) was developed, which seeks to understand the factors that provide happiness or well-being in organizations. Despite the intensive use of labor, the construction industry does not seem to apply such knowledge, but develops many aspects of worker quality of life. Thus, the objective of this research is to propose a scale of WBW aimed at the workers in the construction industry. For this, the Item Response Theory (IRT) was used to design the instrument used in the scale. Through a Systematic Literature Review (RSL) conducted in 10 research bases, 92 studies were mapped that pointed out 89 aspects related to the welfare of this group of workers. Based on these aspects, several instruments already validated in other researches were sought to constitute the initial instrument of this study, which consists of 53 items related to the following themes: WBW, stress, work-family relationship, safety, alcohol and tobacco consumption, physical health and musculoskeletal disorders. The instrument was applied to 376 construction workers. The results were tabulated and IRT was applied using the Samejima model for gradual items. The final instrument is composed of 32 items, since 2 items had reduced factor loading (less than 0.30) and 19 items had low discriminatory power (below 0.65). The scale consists of 5 levels (-2, -1, 0, +1 and +2), classifying the individual according to their perception of the following aspects: WBW, stress, work-family relationship and physical health. This research is expected to contribute to the theoretical framework of WBW, as well as to the promotion of such perspectives in civil construction.Item Acesso aberto (Open Access) Modelo para estimar o prazo de execução de obras residenciais verticais: por meio da lógica fuzzy(Universidade Federal do Pará, 2017-05-26) MAUÉS, Luiz Maurício Furtado; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973The definition of the execution time of vertical residential buildings occurs, in most cases, empirically and during the economic and financial feasibility study of the project. This generates high risks and uncertainties regarding the deadline compliance. However, there are tools of computational intelligence that can contribute to the reduction of the degree of uncertainty, among them the fuzzy logic. This work aims to develop a hybrid model to estimate, in a reasonable way, the construction period of vertical residential buildings by associating factor analysis and fuzzy logic. For this it was used a database from the Municipal Secretary of Urban Development of Belém (SEURB) and the developers of the city, which are target of the case study, in the period from 08/24/2015 to 09/11/2015. To build the model, in the first step, i.e., the factor analysis, 127 projects were used; in the second step, the fuzzy inference, 71 projects were used; and, for the validation phase, 16 projects were used. Results obtained showed a significant level of assertiveness, with accuracy of 75%, taking into account an interval whose limits (upper and lower) were calculated in the mean absolute percentage error (MAPE). The model delivered a prediction performance superior to other models already accepted in literature. As theoretical contribution, the work allows a better understanding of the uncertainties and risks regarding the definition of the execution time of real estate projects, and also about how the modeling can help entrepreneurs/construction campany and technicians to make better decisions based on a hybrid model, considering the uncertain and complex environment of the economic and financial feasibility study phase for future projects.