Bauphysik最新文献

{"title":"Veranstaltungen: Bauphysik 3/2025","authors":"","doi":"10.1002/bapi.202580332","DOIUrl":"https://doi.org/10.1002/bapi.202580332","url":null,"abstract":"","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":""},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inhalt: Bauphysik 3/2025","authors":"","doi":"10.1002/bapi.202580321","DOIUrl":"https://doi.org/10.1002/bapi.202580321","url":null,"abstract":"","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":""},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bapi.202580321","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bauphysik aktuell Bauphysik 3/2025","authors":"","doi":"10.1002/bapi.202580331","DOIUrl":"https://doi.org/10.1002/bapi.202580331","url":null,"abstract":"","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"217-225"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Schwinden und Schüsseln von Estrichen – Auswertung des Schüsselns gemäß EN 13892-9","authors":"Prof. Dr.-Ing. Robert Schulte Holthausen","doi":"10.1002/bapi.202500012","DOIUrl":"https://doi.org/10.1002/bapi.202500012","url":null,"abstract":"<p><b>Shrinkage and curling of screeds – Evaluation of the curling according to EN 13892-9</b></p><p>Screeds are used to ensure the evenness and load distribution of floors. Particularly critical is the deformation caused by hydration and drying shrinkage which can lead to tension, cracks or even the lifting of the screed edges, the so-called curling. With DIN EN 13892-9:2019, a standardized method for the combined measurement of the change in length and the curling of screeds has been defined for the first time. There is a simple connection between the results of the change in length and the shrinkage elongation of the screed. In contrast, the standard does not yet describe any possibility for deriving a material-related, geometry-independent shrinkage deformation from curling measurement and consequently it is not considered in the evaluation.</p><p>This article provides a theoretical derivation for evaluating the curling which enables the calculation of the cross-sectional linear shrinkage difference. The derivation indicates that the Young's modulus is an important material property that influences results. The evaluation is applied to a real measurement of the dimensional stability of a cement screed mortar and discussed in the context of internal tensions and increased deformations under real site application.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"173-181"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elektrowärmeversorgung von Gebäuden mit Photovoltaik","authors":"Prof. Dr. rer. nat. Johannes Goeke","doi":"10.1002/bapi.202500013","DOIUrl":"https://doi.org/10.1002/bapi.202500013","url":null,"abstract":"<p><b>Electric heating supply of buildings with photovoltaics</b></p><p>The heat supply of buildings, which for many years was largely ensured by oil and gas, is changing through the use of heat pumps and will thus become an electricity-based energy supply in the future. This is largely dominated by the large electricity producers, but the trend is towards securing part of the required energy using photovoltaics in one's own building. Due to the improved insulation of buildings with ever lower heat requirements, it is becoming interesting from an ecological and economic point of view to align the heat requirement of the building solely with the supply of electrical energy and to generate the majority of this heat energy yourself. This hypothesis is to be examined in this study. With a correspondingly low heat requirement of less than 6000 kWh, it should be possible - with appropriate efficient system technology and photovoltaic area - to achieve a level of self-sufficiency of 75 %. This means that the building must obtain the same amount of electricity from the supplier for the remaining heating of 1250 kWh as a heat pump with an annual performance factor of 4 would require in the same year. With this assumption, it is important to investigate the size of a storage battery and the area of a photovoltaic system. The ratio of usable photovoltaic area to the size of the storage battery, the achievable degree of self-sufficiency and the purchase of external electrical energy are the decisive parameters.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"161-172"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ein Luxemburger Leitfaden für die Planung von Innendämmprojekten durch Messungen und Simulationen","authors":"Dr.-Ing. Sebastian Latz,&nbsp;Prof. Dr.-Ing. Andreas Thewes,&nbsp;Branca Delmonte M.Sc.,&nbsp;Prof. Dr.-Ing. Stefan Maas","doi":"10.1002/bapi.202500008","DOIUrl":"https://doi.org/10.1002/bapi.202500008","url":null,"abstract":"<p><b>A Luxembourg guide for planning interior insulation projects using measurements and simulations</b></p><p>The decarbonisation of the building sector plays a crucial role on the path to climate neutrality. To this end, the current EU directives are constantly being implemented in Luxembourg and for some years now, a minimum heat transmission coefficient U to be achieved for renovations has also been included in the Luxembourg Building Energy Act. Especially in historic and protected buildings, but also in many other buildings with limited space on the outside for example, interior insulation is often the only way to reduce transmission heat losses through the façade and thus also reduce greenhouse gas emissions. Limit values to be complied with are also specified for this type of insulation measure. At the same time, however, many architects and engineers are concerned that the use of interior insulation will risk structural damage and thus damage the building fabric or promote an unhealthy indoor climate. This is often due to the “dew point shift” in the masonry as a result of the interior insulation. This probably arises from the simplifications of the “Glaser”-method that is internalized by many planners, although in practice very often no permanent wetting occurs and no mold grows due to the sorption properties and capillarity of correctly chosen insulation material. As a result, the internal insulation works more often than expected without any problems. This article clarifies whether and by which building physics measurements and simulations in the preparation phase of an internal insulation project planning reliability can be increased. One focus is on hygrothermal functional verification for natural stone façades, where the standard-based, simplified verification procedure usually fails because conservative assumptions are deposited or the standards even excludes this application to stay on the save side. At the University of Luxembourg, a general guideline for interior insulation projects has been developed on behalf of the Public Buildings' Administration (Administration des Bâtiments Publics - ABP for short) in order to provide planning aid to architects and engineers. This guideline is summarised hereafter.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"182-204"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Titelbild: Bauphysik 3/2025","authors":"","doi":"10.1002/bapi.202580311","DOIUrl":"https://doi.org/10.1002/bapi.202580311","url":null,"abstract":"<p><b>Zum Titelbild</b></p><p>Die Wände sanierungsbedürftiger Häuser sind selten glatt – ein Problem für starre Dämmplatten. Eine starke Alternative ist der Dämmund Entfeuchtungsputz HAGA Biotherm für innen und außen. Der Spezialputz auf Naturkalkbasis egalisiert Unebenheiten und macht einen aufwändigen Untergrundausgleich überflüssig. Über seine gute Dämmwirkung hinaus (Wärmeleitzahl l ca. 0,060 W/mK) reguliert er die Feuchtigkeit (Wasserdampfdiffusion ca. 8 µ). Er sorgt für ein dauerhaft trockenes Mauerwerk und transportiert Salze ab bzw. lagert sie langfristig ein. Das verhindert Ausblühungen und Putzabplatzungen. Mehr im ausführlichen Bericht auf den Seiten A4–A5.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":""},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bapi.202580311","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fire propagation test of multi-planar façades with CFD simulations","authors":"Krisztián Sándor Oláh M.Sc.,&nbsp;Ass. Prof. Dr. Lajos Gábor Takács","doi":"10.1002/bapi.202400044","DOIUrl":"https://doi.org/10.1002/bapi.202400044","url":null,"abstract":"<p>Preventing the façade fire propagation is an important element of the different fire safety legislations but most of the regulations and the façade fire propagation test standards apply only to vertical façades, while in the case of the practical situations non-planar façades are also typical. To remedy the shortcomings of these regulations, the use of CFD simulations may serve as a solution. By modelling the full-scale façade fire test according to the Hungarian standard MSZ 14800–6 in FDS, a new “testing method” presents itself, which allows us to examine façade geometries with unknown fire behaviour. In this study, features influencing the fire propagation of non-planar façades are introduced.</p><p><b>Brandausbreitungstest von nicht-ebenen Fassaden mit CFD-Simulationen</b></p><p>Die Verhinderung der Ausbreitung von Fassadenbränden ist ein wichtiges Element der verschiedenen Brandschutzvorschriften, aber die meisten Vorschriften und Normen für die Prüfung der Ausbreitung von Fassadenbränden gelten nur für vertikale Fassaden, während in der Praxis auch nicht-ebene oder nicht-senkrechte Fassaden vorkommen. Um die Unzulänglichkeiten dieser Vorschriften zu beheben, kann der Einsatz von CFD-Simulationen als Lösung dienen. Mit der Modellierung des Fassadenbrandversuchs nach der ungarischen Norm MSZ 14800–6 in FDS bietet sich eine neue “Prüfmethode”, die es erlaubt, Fassadengeometrien mit unbekanntem Brandverhalten zu untersuchen. In dieser Studie werden Merkmale vorgestellt, die die Brandausbreitung von nicht-ebenen Fassaden beeinflussen.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"205-213"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vorschau: Bauphysik 3/2025","authors":"","doi":"10.1002/bapi.202580342","DOIUrl":"https://doi.org/10.1002/bapi.202580342","url":null,"abstract":"","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":""},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bapi.202580342","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Schallschutz bei externen Energieversorgungsanlagen – Hinweise auf notwendige Klärungen","authors":"Dr.-Ing. Christian Fischer","doi":"10.1002/bapi.202500016","DOIUrl":"https://doi.org/10.1002/bapi.202500016","url":null,"abstract":"<p><b>Noise protection for external energy supply systems – Indications on necessary clarifications</b></p><p>In the course of the energy transition in the building sector, more and more external noise sources are being installed: Heat pumps not only for single-family homes, but also for apartment buildings and residential complexes, combined heat and power plants for larger residential or commercial complexes. As a result, complaints about noise pollution from these systems occur frequently. It is becoming apparent that the technical regulations have not yet adequately covered the corresponding tasks. This article specifies the topic with indications and proposals.</p>","PeriodicalId":55397,"journal":{"name":"Bauphysik","volume":"47 3","pages":"214-216"},"PeriodicalIF":0.2,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144339508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}