Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development

The importance of considering thermal bridges and their impacts on thermal transmittance calculation is an issue that has been discussed in cold season climate regions in Brazil. The presence of vulnerable points on the building envelope may affect thermal performance, besides the implications in th...

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主要な著者:	Freitas, Julye Ramalho de, Leitzke, Rodrigo Karini, Cunha, Eduardo Grala da
フォーマット:	Online
言語:	eng
出版事項:	Universidade Estadual de Campinas 2020
オンライン･アクセス:	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8656062
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spelling	oai:ojs.periodicos.sbu.unicamp.br:article-86560622020-08-18T18:33:38Z Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development Pontes térmicas em estruturas de concreto: análise das condições de formação de fungos filamentosos Freitas, Julye Ramalho de Leitzke, Rodrigo Karini Cunha, Eduardo Grala da Thermal bridges Filamentous fungi Computational simulation Pontes térmicas Fungos filamentosos Simulação computacional The importance of considering thermal bridges and their impacts on thermal transmittance calculation is an issue that has been discussed in cold season climate regions in Brazil. The presence of vulnerable points on the building envelope may affect thermal performance, besides the implications in the building walls and roofs' compositions, such as the filamentous fungi development. Internationally, it is observed the consideration of this theme in different rules and regulations. This study aims to discuss, through computer simulation, the need for Brazilian performance standards to consider the possibility of filamentous fungi formation in buildings with low and high thermal insulation. The analysis examines the thermo-hygrometric conditions near the building model's reinforced concrete structure where the thermal bridges occur and the surfaces of the vertical masonry enclosures for all facades. The results show a high probability of filamentous fungi growth in thermal bridges when the building is insulated, i.e., with low thermal transmittance. This study also points out that aspects related to the building's occupants, such as the control of natural humidity, can interfere with the indoor air's humidity level and, consequently, favor the formation of filamentous fungi. A importância de considerar as pontes térmicas e seus impactos no cálculo de transmitância térmica é um assunto que tem sido discutido em regiões de clima com estação fria no Brasil. A presença de pontos vulneráveis no envelope do edifício pode ter consequências no desempenho térmico, além das implicações nas paredes e coberturas do edifício, como por exemplo a formação de fungos filamentosos. Várias normas e regulamentos tratam da temática. Esse estudo tem por objetivo discutir, por intermédio de simulação computacional, a necessidade das normas Brasileiras de desempenho considerarem a possibilidade de formação de fungos filamentosos nas edificações com baixo e elevado isolamento térmico. Na análise examina-se as condições termo-higrométricas próximas a estrutura de concreto armado do modelo da edificação onde ocorrem as pontes térmicas, e as superfícies dos fechamentos vertical, de alvenaria, para todas as fachadas. Os resultados mostram que existe uma elevada probabilidade de crescimento dos fungos filamentosos nas pontes térmicas quando o edifício é mais isolado, ou seja, apresenta baixa transmitância térmica. Universidade Estadual de Campinas 2020-12-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Text Texto application/pdf https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8656062 10.20396/parc.v11i0.8656062 PARC Pesquisa em Arquitetura e Construção; Vol. 11 (2020): Continuous publication; e020027 PARC Pesquisa em Arquitetura e Construção; Vol. 11 (2020): Publicação contínua; e020027 PARC Pesquisa em Arquitetura e Construção; v. 11 (2020): Publicação contínua; e020027 1980-6809 eng https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8656062/25693 South region of Brazil; Comtemporary Região Sul do Brasil; Contemporâneo Copyright (c) 2020 PARC Pesquisa em Arquitetura e Construção https://creativecommons.org/licenses/by/4.0
institution	Universidade Estadual de Campinas
collection	OJS
language	eng
format	Online
author	Freitas, Julye Ramalho de Leitzke, Rodrigo Karini Cunha, Eduardo Grala da
spellingShingle	Freitas, Julye Ramalho de Leitzke, Rodrigo Karini Cunha, Eduardo Grala da Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
author_facet	Freitas, Julye Ramalho de Leitzke, Rodrigo Karini Cunha, Eduardo Grala da
author_sort	Freitas, Julye Ramalho de
title	Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
title_short	Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
title_full	Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
title_fullStr	Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
title_full_unstemmed	Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
title_sort	thermal bridges in concrete structures: analysis of the conditions of filamental fungi development
description	The importance of considering thermal bridges and their impacts on thermal transmittance calculation is an issue that has been discussed in cold season climate regions in Brazil. The presence of vulnerable points on the building envelope may affect thermal performance, besides the implications in the building walls and roofs' compositions, such as the filamentous fungi development. Internationally, it is observed the consideration of this theme in different rules and regulations. This study aims to discuss, through computer simulation, the need for Brazilian performance standards to consider the possibility of filamentous fungi formation in buildings with low and high thermal insulation. The analysis examines the thermo-hygrometric conditions near the building model's reinforced concrete structure where the thermal bridges occur and the surfaces of the vertical masonry enclosures for all facades. The results show a high probability of filamentous fungi growth in thermal bridges when the building is insulated, i.e., with low thermal transmittance. This study also points out that aspects related to the building's occupants, such as the control of natural humidity, can interfere with the indoor air's humidity level and, consequently, favor the formation of filamentous fungi.
publisher	Universidade Estadual de Campinas
publishDate	2020
url	https://periodicos.sbu.unicamp.br/ojs/index.php/parc/article/view/8656062
work_keys_str_mv	AT freitasjulyeramalhode thermalbridgesinconcretestructuresanalysisoftheconditionsoffilamentalfungidevelopment AT leitzkerodrigokarini thermalbridgesinconcretestructuresanalysisoftheconditionsoffilamentalfungidevelopment AT cunhaeduardogralada thermalbridgesinconcretestructuresanalysisoftheconditionsoffilamentalfungidevelopment AT freitasjulyeramalhode pontestermicasemestruturasdeconcretoanalisedascondicoesdeformacaodefungosfilamentosos AT leitzkerodrigokarini pontestermicasemestruturasdeconcretoanalisedascondicoesdeformacaodefungosfilamentosos AT cunhaeduardogralada pontestermicasemestruturasdeconcretoanalisedascondicoesdeformacaodefungosfilamentosos
_version_	1709640972754747392

Thermal bridges in concrete structures: analysis of the conditions of filamental fungi development

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