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STRUCTURAL FIRE ENGINEERING ON HERITAGE INDUSTRIAL BUILDINGS. STRUCTURAL MEASURES TO GUARANTEE THEIR PERFORMANCE 遗产工业建筑的结构防火工程。保证其性能的结构措施
ce/papers Pub Date : 2024-03-27 DOI: 10.1002/cepa.3046
Roberto Cerdeiriña, Gabriele Vigne, Jimmy Jönsson, Alejandro Torres, Andrea Bartolini, Enrico Lombini
{"title":"STRUCTURAL FIRE ENGINEERING ON HERITAGE INDUSTRIAL BUILDINGS. STRUCTURAL MEASURES TO GUARANTEE THEIR PERFORMANCE","authors":"Roberto Cerdeiriña,&nbsp;Gabriele Vigne,&nbsp;Jimmy Jönsson,&nbsp;Alejandro Torres,&nbsp;Andrea Bartolini,&nbsp;Enrico Lombini","doi":"10.1002/cepa.3046","DOIUrl":"https://doi.org/10.1002/cepa.3046","url":null,"abstract":"<p>Industrial Architecture and their associated engineering structures have a clear objective. They need to be designed and constructed to allow for a product production independently of their nature. In the early XX century German Architecture, especially with the “Bauhaus” movement and others, such as Pier Luigi Nervi in Italy, provided a great impulse to the concept of Industrial Architecture constituting pieces of art. Today, we find examples of industrial buildings that are excellently preserved, and the management of their changing flexibility demand generate engineering judgement to accommodate new “production options” with a safe performance.</p>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 1-2","pages":"290-299"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140297182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
STEEL PLATE GIRDERS: RESIDUAL STRESSES FROM THE MANUFACTURING PROCESS 钢板梁：制造过程中产生的残余应力
ce/papers Pub Date : 2024-03-27 DOI: 10.1002/cepa.3030
Sebastião Gomes Ferreira, Sérgio Nascimento, José Oliveira Pedro
{"title":"STEEL PLATE GIRDERS: RESIDUAL STRESSES FROM THE MANUFACTURING PROCESS","authors":"Sebastião Gomes Ferreira,&nbsp;Sérgio Nascimento,&nbsp;José Oliveira Pedro","doi":"10.1002/cepa.3030","DOIUrl":"https://doi.org/10.1002/cepa.3030","url":null,"abstract":"<div>\u0000 \u0000 <p>The manufacturing process of steel plate girders generates residual stresses and geometrical imperfections in the flange and web plates that constitute them. These imperfections must respect the manufacturing tolerances that are presented in the regulation. In the present work several stages of the manufacturing process are studied, being these the thermal cutting of the plates, the assembling of the beam and the flange-web welding process. This work is also accompanied by several results in terms of residual stresses and geometric imperfections of an experimental study and is made the confrontation of those results with the theoretical information available on the prEN 1993-1-14 and with the results obtained by numerical models that simulate the thermal processes of the plates cutting and welding.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 1-2","pages":"134-144"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.3030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140297267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FACULTY OF PSYCOLOGY OF MÁLAGA, SPAIN. COMPOSITE STEEL-CONCRETE STRUCTURE IN A SINGULAR BUILDING 西班牙马拉加心理学院。奇异建筑中的钢-混凝土复合结构
ce/papers Pub Date : 2024-03-27 DOI: 10.1002/cepa.3019
Javier Gómez, Isabel Sáez, Alejandro Bernabeu
{"title":"FACULTY OF PSYCOLOGY OF MÁLAGA, SPAIN. COMPOSITE STEEL-CONCRETE STRUCTURE IN A SINGULAR BUILDING","authors":"Javier Gómez,&nbsp;Isabel Sáez,&nbsp;Alejandro Bernabeu","doi":"10.1002/cepa.3019","DOIUrl":"https://doi.org/10.1002/cepa.3019","url":null,"abstract":"<div>\u0000 \u0000 <p>The paper presents the design and construction of the new Faculty of Psychology in Málaga, Spain, by LLPS Architects. The project offers an interesting example of the relation between structure and architecture, based on a singular configuration of a composite steel-concrete structure, which responds in a coherent and attractive way to the architectural configuration. The building is formed by a massive and compact three-heights volume of 90x100 m. Two main architectural features determine the structural configuration: the interior courtyards, that measure 18x3 m., and are disposed in staggered arrangement to allow the entrance of natural light; and the cantilever of the above-ground volume, that creates a large column-free covered space.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 1-2","pages":"27-35"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.3019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140297293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ASSESSMENT OF THE MECHANICAL STRENGTH OF A STRUCTURE SUBJECT FO FIRE ATTACK AT THE WILDLAND-URBAN INTERFACE (WUI) 评估荒地与城市交界处（WUI）遭受火灾袭击的结构的机械强度
ce/papers Pub Date : 2024-03-27 DOI: 10.1002/cepa.3036
Cesare Fiorini, Hélder D. Craveiro, e Aldina C. Santiago
{"title":"ASSESSMENT OF THE MECHANICAL STRENGTH OF A STRUCTURE SUBJECT FO FIRE ATTACK AT THE WILDLAND-URBAN INTERFACE (WUI)","authors":"Cesare Fiorini,&nbsp;Hélder D. Craveiro,&nbsp;e Aldina C. Santiago","doi":"10.1002/cepa.3036","DOIUrl":"https://doi.org/10.1002/cepa.3036","url":null,"abstract":"<div>\u0000 \u0000 <p>Fires at the Wildland-Urban Interface (WUI) have a strong detrimental impact on the built environment. This study evaluates the effect of fire in the WUI on steel sandwich panels in a prescriptive fire field experience. The heat transfer mechanisms are obtained using a computational fluid dynamic (CFD) simulation, more specifically the adiabatic surface temperatures (AST) of the structure. The ASTs were applied in a finite element model (FEM) as boundary conditions in the thermal field in order to quantify the heat transfer processed by the FEM. In conclusion, it is identified which area of the structure is most affected due to the temperatures in the panels.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"7 1-2","pages":"192-201"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.3036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140297297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modelling the effect of mortar constituents on rheological properties 模拟砂浆成分对流变性能的影响
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.2919
Mahmoud Eslami Pirharati, Dirk Lowke, Inka Mai
{"title":"Modelling the effect of mortar constituents on rheological properties","authors":"Mahmoud Eslami Pirharati,&nbsp;Dirk Lowke,&nbsp;Inka Mai","doi":"10.1002/cepa.2919","DOIUrl":"https://doi.org/10.1002/cepa.2919","url":null,"abstract":"<div>\u0000 \u0000 <p>Concrete is a widely used construction material whose potential has not yet been fully exploited due to the lack of knowledge about its rheological behaviour. The mix composition is assumed to play a key role in controlling the rheological properties of concrete. Due to the extremely high proportion of finer particles in concrete, the investigation of the rheological properties of the mortar and paste phases is of major importance in understanding the rheological behaviour of concrete. Therefore, this paper systematically investigates the impact of water-to-cement ratio, sand content, and maximum sand size on the rheology of flowable mortars. It also explores the applicability of existing models for modeling these mortars.</p>\u0000 <p>The results, presented as a rheograph, reveal that a reduction of the w/c ratio and an increase in the sand solid content in the mortar leads to an increase in the rheological properties plastic viscosity and yield stress. Also, the addition of coarser sand in mortar compositions induces an increase in the maximum solid content and consequently a decrease in plastic viscosity. In addition, it shows that the Krieger-Dougherty and Liu models are appropriate enough for modelling polydisperse suspensions.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"638-647"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.2919","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Leistungsbezogene Bewertung der Dauerhaftigkeit von Betonbauwerken durch baustellentaugliche Abnahmeprüfungen 评估混凝土结构通过工地进行预检测对其可行性的评估
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.2915
David Ov, Juan Mauricio Lozano-Valcarcel, Rolf Breitenbücher, Thomas Kränkel, Christoph Gehlen
{"title":"Leistungsbezogene Bewertung der Dauerhaftigkeit von Betonbauwerken durch baustellentaugliche Abnahmeprüfungen","authors":"David Ov,&nbsp;Juan Mauricio Lozano-Valcarcel,&nbsp;Rolf Breitenbücher,&nbsp;Thomas Kränkel,&nbsp;Christoph Gehlen","doi":"10.1002/cepa.2915","DOIUrl":"https://doi.org/10.1002/cepa.2915","url":null,"abstract":"<div>\u0000 \u0000 <p>Für die Dauerhaftigkeit eines Bauwerks ist die Qualität des eingebauten Betons entscheidend. Allerdings sind bislang für die dauerhaftigkeitsrelevanten Betoneigenschaften noch keine direkten Bewertungskriterien definiert worden. Die Qualität des eingebauten Betons wird in der Regel an separat hergestellten Proben nachgewiesen. Vergangene Forschungsarbeiten haben gezeigt, dass die am Bauwerk erzielten Betoneigenschaften von denen der separat hergestellten Proben erheblich abweichen können. In dem künftigen performance-basierten Dauerhaftigkeitskonzept ist zudem die direkte Prüfung der relevanten Parameter (Karbonatisierungsrate, Chlorideindringung usw.) mit einem vergleichsweise hohen Aufwand verbunden. Es wird in der Praxis ohnehin nicht umsetzbar sein, die dauerhaftigkeitsrelevanten Eigenschaften im hinreichenden Umfang über die direkten Prüfverfahren zu überwachen. Vielmehr ist die Qualität des Betons auf der Baustelle durch indirekte Schnellprüfverfahren (z.B. Wenner-Sonde) zu bewerten, die damit verbunden in engeren Zeitabständen durchführbar und somit auch baustellengerecht sind. Hierzu liegen jedoch noch keine ausreichenden Erfahrungen über die Anwendbarkeit und Reproduzierbarkeit auf den Baustellen vor.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"1493-1504"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.2915","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Eignung des RCM-Versuchs zur Bestimmung des Chloridmigrationskoeffizienten in Mörteln aus alternativen Bindemitteln 我的视力与先前的婴儿不配
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.2974
Rebecca Achenbach, Bettina I. E. Kraft, Michael Raupach, Horst-Michael Ludwig
{"title":"Eignung des RCM-Versuchs zur Bestimmung des Chloridmigrationskoeffizienten in Mörteln aus alternativen Bindemitteln","authors":"Rebecca Achenbach,&nbsp;Bettina I. E. Kraft,&nbsp;Michael Raupach,&nbsp;Horst-Michael Ludwig","doi":"10.1002/cepa.2974","DOIUrl":"https://doi.org/10.1002/cepa.2974","url":null,"abstract":"<div>\u0000 \u0000 <p>Die Hauptursache für die Korrosion von Bewehrungsstahl vor allem in Infrastrukturbauwerken ist das Eindringen von Chloriden, die am Stahl zu hohen Korrosionsraten und großen Querschnittsverlusten führen können. Ein häufig verwendetes beschleunigtes Testverfahren ist der Rapid Chloride Migration (RCM)-Test, mit dem der Chlorideindringwiderstand von Betonen und Mörteln anhand eines im elektrischen Feld ermittelten Migrationskoeffizienten bewertet wird. Die neuartigen Bindemittel, die mit geringerem CO<sub>2</sub>-Ausstoß hergestellt werden können als reiner Portlandzement (PZ), unterscheiden sich teilweise in ihren Porenlösungszusammensetzungen von PZ-basierten Systemen. Daher besteht die aktuelle Fragestellung, ob die zur Berechnung des Migrationskoeffizienten notwendige und in den aktuellen Prüfvorschriften angegebene Chloridkonzentration, die den Farbumschlag der Indikatorlösung zur Bestimmung der Chlorideindringtiefe auslöst, für diese Bindemittel gültig ist. Zur Klärung dieser Fragestellung wurden an neun verschiedenen Mörteln aus alternativen Bindemitteln der RCM-Versuch und weitere Untersuchungen zur Bestimmung des Chloridgehaltes in der Tiefe des Farbumschlags durchgeführt und die Auswirkungen auf die ermittelten Migrationskoeffizienten dargestellt.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"1237-1245"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.2974","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Frosteinfluss auf den Chloridtransport in Beton - Kennwerte 奎刚师父师父
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.2953
Christoph Langer, Gesa Kapteina
{"title":"Frosteinfluss auf den Chloridtransport in Beton - Kennwerte","authors":"Christoph Langer,&nbsp;Gesa Kapteina","doi":"10.1002/cepa.2953","DOIUrl":"https://doi.org/10.1002/cepa.2953","url":null,"abstract":"<div>\u0000 \u0000 <p>Im Winter wird überwiegend das Salz NaCl zur Aufrechterhaltung der Verkehrssicherheit auf Straßen und andere Infrastrukturbauwerke gestreut. Die in der Eisschmelze vorhandenen Chloridionen dringen in den Stahlbeton überwiegend durch die Transportprozesse Diffusion und Konvektion ein. Durch die Exposition Frost (XF) kann es zur Koppelung der Transportprozesse kommen und den Chlorideintrag in Hinblick auf die eingetragene Menge und Tiefe erhöhen. Betone, die bereits im CDF-Test mit NaCl beaufschlagt wurden, werden zu verschiedenen Zeitpunkten im Migrationstest auf die Widerstandsfähigkeit gegenüber erneutem Ioneneindringen (Bromidionen, RBM-Versuch) getestet. Dadurch kann der Einfluss der Frost-Tausalz-Wechsel (FTSW) des CDF-Versuches auf das Bromideindringen im anschließenden Migrationsversuch (RBM) untersucht werden. Die Quantifizierung der Chlorid- und Bromidgehalte erfolgt mit der Laser-Induzierten Breakdown Spektroskopie (LIBS). Ergänzende Untersuchungen wie die Fluoreszenzmikroskopie liefern weitere Erkenntnisse, die auf das Wirken von Frost in der Konvektionszone zurückzuführen sind. Durch die Kombination der Laborversuche CDF- und Migrationsversuch (RBM) können unter Einbezug der LIBS-Analyse Kennwerte ermittelt werden, die den Frosteinfluss auf den Chloridtransport in Beton quantifizierbar machen.</p>\u0000 </div>","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"1205-1213"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.2953","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vorwort | Preface
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.3014
{"title":"Vorwort | Preface","authors":"","doi":"10.1002/cepa.3014","DOIUrl":"https://doi.org/10.1002/cepa.3014","url":null,"abstract":"","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Challenges for Embedding RFID Sensors in Reinforced Concrete for Low-effort Structural Health Monitoring 在钢筋混凝土中嵌入射频识别传感器进行低强度结构健康监测的挑战
ce/papers Pub Date : 2023-12-06 DOI: 10.1002/cepa.2893
Christian Walther, Feras Alkam, Long Nguyen-Tuan, Matthias Lieboldt, Tom Lahmer
{"title":"Challenges for Embedding RFID Sensors in Reinforced Concrete for Low-effort Structural Health Monitoring","authors":"Christian Walther,&nbsp;Feras Alkam,&nbsp;Long Nguyen-Tuan,&nbsp;Matthias Lieboldt,&nbsp;Tom Lahmer","doi":"10.1002/cepa.2893","DOIUrl":"https://doi.org/10.1002/cepa.2893","url":null,"abstract":"The structural health of civil infrastructure can be monitored using non‐destructive testing methods and wireless sensor technology. Buildings are often made of reinforced concrete, in which the sensors can be embedded during construction. The implementation of sensor‐based monitoring therefore fundamentally requires robust electronics. The wireless sensors must meet the special requirements of different areas such as communication, durability in the concrete, and compatibility with future readers. Taking into account previous approaches from practice and research, an elicitation of basic requirements for a Radio Frequency Identification (RFID) sensor system that can be embedded in concrete was carried out. Specific problems related to embedding electronic sensors in concrete and their design are investigated. Simple RFID sensor systems have been developed that allow operation without cables or batteries. The main sensor requirements are listed accordingly. Challenges and issues that need to be considered when using RFID sensors in concrete are described. Finally, the “life cycle” of a sensor system embedded in reinforced concrete is briefly discussed.","PeriodicalId":100223,"journal":{"name":"ce/papers","volume":"6 6","pages":"1460-1469"},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cepa.2893","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138502468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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