R. Zanon, M. Schäfer, G. Ruiz, Á. Rosa, Qingjie Zhang
Composite construction in steel and concrete represents a very effi cient structural solution because the materials are used according to their best properties. Concrete has good compressive strength and is easy to form into any shape, making it particularly suitable for fl at structures such as slabs. Structural steel has both high compressive and tensile strength together with high ductility. For conventional composite sections with a double symmetrical steel section and a concrete fl ange with a large eff ective width arranged above the steel top fl ange, usually fully plastic resistance is reached when the cross-section is classifi ed into cross-section Classes 1 or 2. This classifi cation avoids too slender cross-sections and prevents the risk of local buckling so that the cross-sections meet the requirements for high rotational capacity.
{"title":"Steel‐fibre reinforced concrete in composite structures as a mean to increase resistance and ductility","authors":"R. Zanon, M. Schäfer, G. Ruiz, Á. Rosa, Qingjie Zhang","doi":"10.1002/stco.202370106","DOIUrl":"https://doi.org/10.1002/stco.202370106","url":null,"abstract":"Composite construction in steel and concrete represents a very effi cient structural solution because the materials are used according to their best properties. Concrete has good compressive strength and is easy to form into any shape, making it particularly suitable for fl at structures such as slabs. Structural steel has both high compressive and tensile strength together with high ductility. For conventional composite sections with a double symmetrical steel section and a concrete fl ange with a large eff ective width arranged above the steel top fl ange, usually fully plastic resistance is reached when the cross-section is classifi ed into cross-section Classes 1 or 2. This classifi cation avoids too slender cross-sections and prevents the risk of local buckling so that the cross-sections meet the requirements for high rotational capacity.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49128852","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}
Rafaela Don, Georgios Balaskas, C. Vulcu, B. Hoffmeister
Owing to the new rules of the German National Annex to EN 1998‐1, the relevance of the seismic action has increased, materialising in extended seismic areas and higher spectral accelerations. This may lead to seismic loading being decisive on the design of steel and composite frames. However, the demand is lower in Germany than in other seismic areas. Consequently, these challenges are addressed in an ongoing German national research project, by developing joints with dissipative connections, classified as semi‐rigid and partial‐strength, for steel and composite frames that could allow for the use of behaviour factors in the range of 1.5 to 3. The development started with typical connections from the German catalogue, designed to withstand static loads in the elastic range, followed by performance and detailing improvements. Developments (e.g., increase in sagging/hogging bending: 125 %/18 % of steel joints and 70 %/40 % of partially composite joints) resulted from pre‐test finite element analyses (FEA) on joints and frame models. Improvements to joint detailing were made according to the provisions of the newest draft of Eurocode 8. The optimised joints were integrated in frame specimens, which are currently being tested under monotonic and cyclic loads at RWTH‐Aachen University. This article introduces the developed joint solutions, describes the experimental and numerical programs and presents the monotonic response of frame specimens based on the results of FEA, as well as the main conclusions.
{"title":"Steel and composite joints with dissipative connections for MRFs in moderate seismicity – Experimental and numerical programs","authors":"Rafaela Don, Georgios Balaskas, C. Vulcu, B. Hoffmeister","doi":"10.1002/stco.202200044","DOIUrl":"https://doi.org/10.1002/stco.202200044","url":null,"abstract":"Owing to the new rules of the German National Annex to EN 1998‐1, the relevance of the seismic action has increased, materialising in extended seismic areas and higher spectral accelerations. This may lead to seismic loading being decisive on the design of steel and composite frames. However, the demand is lower in Germany than in other seismic areas. Consequently, these challenges are addressed in an ongoing German national research project, by developing joints with dissipative connections, classified as semi‐rigid and partial‐strength, for steel and composite frames that could allow for the use of behaviour factors in the range of 1.5 to 3. The development started with typical connections from the German catalogue, designed to withstand static loads in the elastic range, followed by performance and detailing improvements. Developments (e.g., increase in sagging/hogging bending: 125 %/18 % of steel joints and 70 %/40 % of partially composite joints) resulted from pre‐test finite element analyses (FEA) on joints and frame models. Improvements to joint detailing were made according to the provisions of the newest draft of Eurocode 8. The optimised joints were integrated in frame specimens, which are currently being tested under monotonic and cyclic loads at RWTH‐Aachen University. This article introduces the developed joint solutions, describes the experimental and numerical programs and presents the monotonic response of frame specimens based on the results of FEA, as well as the main conclusions.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43907040","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}
{"title":"Place and date – Event – Details","authors":"","doi":"10.1002/stco.202370108","DOIUrl":"https://doi.org/10.1002/stco.202370108","url":null,"abstract":"","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46576108","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}
D. Ungermann, Tim Lmański, Bettina Brune, A. Martins, D. Camotim, P. Dinis, Man-Tai Chen, B. Young
Direct Strength Method combined with Eurocode was developed for the design of thin-walled cold-formed steel sections. Cross-section resistance based on numerical elastic buckling analyses is utilized in the global stability verification according to EN 1993-1-3. Tests on perforated and unperforated cold-formed sections in compression and bending and a numerical parametric analyses are used for verification (paper: Ungermann, D.; Lemański, T.; Brune, B.). Dieter Ungermann, Tim Lmański, Bettina Brune A Eurocode-compliant design approach for cold-formed steel sections
{"title":"Preview 2/23","authors":"D. Ungermann, Tim Lmański, Bettina Brune, A. Martins, D. Camotim, P. Dinis, Man-Tai Chen, B. Young","doi":"10.1002/stco.202370109","DOIUrl":"https://doi.org/10.1002/stco.202370109","url":null,"abstract":"Direct Strength Method combined with Eurocode was developed for the design of thin-walled cold-formed steel sections. Cross-section resistance based on numerical elastic buckling analyses is utilized in the global stability verification according to EN 1993-1-3. Tests on perforated and unperforated cold-formed sections in compression and bending and a numerical parametric analyses are used for verification (paper: Ungermann, D.; Lemański, T.; Brune, B.). Dieter Ungermann, Tim Lmański, Bettina Brune A Eurocode-compliant design approach for cold-formed steel sections","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42005599","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}
{"title":"23rd International Colloquium on Stability and Ductility of Steel Structures, University of Aveiro","authors":"P. Real, N. Lopes","doi":"10.1002/stco.202370103","DOIUrl":"https://doi.org/10.1002/stco.202370103","url":null,"abstract":"","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46239990","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}
{"title":"Generalized calculation method for steel profiles embedded in concrete – embedment depths, design at the ultimate limit state and design aids","authors":"","doi":"10.1002/stco.202370104","DOIUrl":"https://doi.org/10.1002/stco.202370104","url":null,"abstract":"","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48259416","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}
A Lego‐like steel‐framed structural system has been developed within the frame of an RFCS project, REDUCE, to facilitate 1) deconstruction of composite structures, 2) circularity at structure and element levels, and 3) serial production in construction by promoting a greater standardization of structural elements. The system utilizes innovative demountable shear connections for composite flooring solutions with precast concrete elements, and adjustable steel connections for use in both beam‐to‐beam and beam‐to‐column connections. The first use case of the structural system has been realized in the Petite Maison project which is a demonstration project for circularity and contributes to the event ESCH2022. Each construction element is linked to a digital database and remains available for future reuse, as a result of the plug‐and‐play, demountable and robust features of the developed system. This paper presents the proposed demountable system, the results from experiments and finite element analyses on the behaviour of shear connections, composite beams, and steel connections, and indicates the analysing methods for structural engineers to open a pathway for full implementation of the structures built into digital tools, fabrication, and construction.
{"title":"A Lego‐like steel‐framed system for standardization and serial production","authors":"C. Odenbreit, Jie Yang, Alfredo Romero, A. Kozma","doi":"10.1002/stco.202200021","DOIUrl":"https://doi.org/10.1002/stco.202200021","url":null,"abstract":"A Lego‐like steel‐framed structural system has been developed within the frame of an RFCS project, REDUCE, to facilitate 1) deconstruction of composite structures, 2) circularity at structure and element levels, and 3) serial production in construction by promoting a greater standardization of structural elements. The system utilizes innovative demountable shear connections for composite flooring solutions with precast concrete elements, and adjustable steel connections for use in both beam‐to‐beam and beam‐to‐column connections. The first use case of the structural system has been realized in the Petite Maison project which is a demonstration project for circularity and contributes to the event ESCH2022. Each construction element is linked to a digital database and remains available for future reuse, as a result of the plug‐and‐play, demountable and robust features of the developed system. This paper presents the proposed demountable system, the results from experiments and finite element analyses on the behaviour of shear connections, composite beams, and steel connections, and indicates the analysing methods for structural engineers to open a pathway for full implementation of the structures built into digital tools, fabrication, and construction.","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47841008","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}
In steel construction, bolted connections are preloaded either for load-bearing capacity reasons or for serviceability reasons. Single and multi-section connections of wind turbines, offshore plants, bridges etc. are typical application examples. Gap formation, caused by imperfections due to fabrication and assembly, poses a risk e. g. for the controlled application of the required preload level as well as for the prevention of cavity corrosion. This can significantly impair the load-bearing capacity and the durability of the connection and even lead to a premature failure. Therefore, the formation of gaps must be kept to a minimum, whereby DIN EN 1090-2 provides possible measures such as the use of packing plates for this purpose. Two-component reaction resin systems based on epoxy resins, which are filled with special metallic materials to improve the mechanical properties, are a possible alternative for gap filling. Systematic investigations were carried out into the use of the gap-filling material MM1018 for use in preloaded bolted connections. In this contribution, experimentally determined slip factors as well as the expected preload losses over the service life are presented and discussed. Stranghöner, N.; Makevicius, L.; Korbaj, A.; Kunde, C. (2023) Einsatz vom duroplastischen Spaltausgleichsmaterial DIAMANT MM1018 in vorgespannten geschraubten Verbindungen. Stahlbau 92, No. 1, pp. 27–38. https://doi.org/10.1002/stab.202200069 The application of duroplastic gap filling material DIAMANT MM1018 in preloaded bolted connections E D I T O R ’ S R E C O M M E N D A T I O N
在钢结构中，螺栓连接是出于承载能力或可用性的原因而预加载的。风力涡轮机、海上工厂、桥梁等的单节和多节连接是典型的应用示例。由制造和组装引起的缺陷引起的间隙形成会带来风险，例如，对所需预加载水平的控制应用以及对空腔腐蚀的预防。这会显著损害连接的承载能力和耐久性，甚至导致过早失效。因此，间隙的形成必须保持在最低限度，因此DIN EN 1090-2提供了可能的措施，例如为此目的使用填料板。基于环氧树脂的双组分反应树脂体系，填充特殊金属材料以提高机械性能，是间隙填充的可能替代方案。对用于预加载螺栓连接的间隙填充材料MM1018的使用进行了系统的研究。在这篇文章中，提出并讨论了实验确定的滑移系数以及使用寿命内的预期预载损失。Stranghöner，N。；Makevicius，L。；Korbaj，A。；Kunde，C.（2023）在Verbindungen的Vogespannten geschraubten Verbindunge的DIAMANT MM1018材料中。Stahlbau 92，第1期，第27-38页。https://doi.org/10.1002/stab.202200069硬塑性间隙填充材料DIAMANT MM1018在预紧螺栓连接中的应用
{"title":"The application of duroplastic gap filling material DIAMANT MM1018 in preloaded bolted connections","authors":"","doi":"10.1002/stco.202370105","DOIUrl":"https://doi.org/10.1002/stco.202370105","url":null,"abstract":"In steel construction, bolted connections are preloaded either for load-bearing capacity reasons or for serviceability reasons. Single and multi-section connections of wind turbines, offshore plants, bridges etc. are typical application examples. Gap formation, caused by imperfections due to fabrication and assembly, poses a risk e. g. for the controlled application of the required preload level as well as for the prevention of cavity corrosion. This can significantly impair the load-bearing capacity and the durability of the connection and even lead to a premature failure. Therefore, the formation of gaps must be kept to a minimum, whereby DIN EN 1090-2 provides possible measures such as the use of packing plates for this purpose. Two-component reaction resin systems based on epoxy resins, which are filled with special metallic materials to improve the mechanical properties, are a possible alternative for gap filling. Systematic investigations were carried out into the use of the gap-filling material MM1018 for use in preloaded bolted connections. In this contribution, experimentally determined slip factors as well as the expected preload losses over the service life are presented and discussed. Stranghöner, N.; Makevicius, L.; Korbaj, A.; Kunde, C. (2023) Einsatz vom duroplastischen Spaltausgleichsmaterial DIAMANT MM1018 in vorgespannten geschraubten Verbindungen. Stahlbau 92, No. 1, pp. 27–38. https://doi.org/10.1002/stab.202200069 The application of duroplastic gap filling material DIAMANT MM1018 in preloaded bolted connections E D I T O R ’ S R E C O M M E N D A T I O N","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44564697","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}
{"title":"Content: Steel Construction 1/23","authors":"","doi":"10.1002/stco.202370102","DOIUrl":"https://doi.org/10.1002/stco.202370102","url":null,"abstract":"","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42792254","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}
Steel ConstructionVolume 16, Issue 1 Annual table of contentsFree Access Annual table of contents: Steel Construction 2022 First published: 09 February 2023 https://doi.org/10.1002/stco.202370110AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume16, Issue1February 2023 RelatedInformation
{"title":"Annual table of contents: Steel Construction 2022","authors":"","doi":"10.1002/stco.202370110","DOIUrl":"https://doi.org/10.1002/stco.202370110","url":null,"abstract":"Steel ConstructionVolume 16, Issue 1 Annual table of contentsFree Access Annual table of contents: Steel Construction 2022 First published: 09 February 2023 https://doi.org/10.1002/stco.202370110AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Volume16, Issue1February 2023 RelatedInformation","PeriodicalId":54183,"journal":{"name":"Steel Construction-Design and Research","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136297074","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}
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