Finite element analysis of extended stiffened end plate link‐to‐column connections

Pirmoz, Akbar; Ahadi, Parviz; Farajkhah, Vahid

doi:10.1002/stco.201350003

Cited by 8 publications

(9 citation statements)

References 18 publications

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“…In future work, the author will continue to complete some frame system tests and a lot of finite element analysis [20,[50][51][52][53]. A comprehensive parametric computational study is conducted to investigate the main parameters and rules that affect the mechanical properties of links after validating the accuracy of the finite element (FE) modelling approach against previous experiments [54][55][56][57][58].…”

Section: Discussionmentioning

confidence: 99%

Experimental Study on Energy Dissipation Performance and Failure Mode of Web-Connected Replaceable Energy Dissipation Link

et al. 2019

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In the current design method of the eccentrically braced frame structure, the energy dissipation link and the frame beam are both designed as a whole. It is difficult to accurately assess the degree of damage through this method, and it is also hard to repair or replace the energy dissipation link after strong seismic events. Meanwhile, the overall design approach will increase the project’s overall cost. In order to solve the above mentioned shortcomings, the energy dissipation link is designed as an independent component, which is separated from the frame beam. In this paper, the energy dissipation link is bolted to the web of the frame beam. Both finite element simulation and test study of eight groups of energy dissipation links have been completed to study their mechanical behaviors, and the energy dissipation links have been studied in the aspects of length, cross section, and stiffener spacing. The mechanical behaviors include the energy dissipation behavior, bearing capacity, stiffness, and plastic rotation angle. The results indicate clearly that the hysteretic loop of links in the test and finite element analysis is relatively full. By comparing the experimental and finite element simulation data, it can be found that the general shape and trend of hysteretic loop, skeleton curve, and stiffness degradation curve are basically the same. The experiment data explicitly shows that the energy dissipation link of web-connected displays good ductility and stable energy dissipation ability. In addition, the replaceable links possess good rotational capacity when the minimum rotation angle of each specimen in the test is 0.16 rad. The results of the experiment show that the energy dissipation capacity of the link is mainly related to the section size and the stiffening rib spacing of the link. The energy dissipation ability and deformation ability of the link is poorer as the section size becomes larger; meanwhile, these abilities are reduced with the decrease of the stiffening spacing. The experiment result shows that the damage and excessive inelastic deformations are concentrated in the link to avoid any issues for the rest of the surrounding elements, and the links can be easily and inexpensively replaced after strong seismic events. The results are thought provoking, as they provide a theoretical basis for the further study of the eccentrically braced frame structure with replaceable links of web-connected. In future work, the author aims to carry out his studies through optimized design methodology based on the yielding criterion.

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Section: Discussionmentioning

confidence: 99%

Experimental Study on Energy Dissipation Performance and Failure Mode of Web-Connected Replaceable Energy Dissipation Link

et al. 2019

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“…Bu enerji kaybı, rijitlik levhalarındaki bazı plastik deformasyonlardan ve alın levhanın sınırlı plastikleşmesinden kaynaklanıyordu. Mevcut sayısal çalışmanın sonuçlarını desteklemek için, bu tür bağlantıların ve diğer bağlantı uzunluklarının döngüsel performansını ve düşük döngüsel yorgunluğun etkilerini, özellikle de prying etkileri nedeniyle cıvataların azalan yorulma ömrünü değerlendirmek için daha fazla deneysel çalışmaya ihtiyaç vardır [9].…”

Section: Buradaunclassified

“…Bu dönüş, birleşimin, alın levhanın ve rijitlik levhası akması yoluyla elde edilir. Çözümün yakınlaşmasındaki zorluklar nedeniyle (alın levha ve cıvata başlarındaki büyük plastik gerinim), analiz 0,005 rad bağlantı dönüşünde durduruldu [9].…”

Section: Buradaunclassified

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Rijitlik Levhalı Alın Levhalarında Akma Çizgileri ve Hesap Yöntemleri

2023

Proceeding Book of 3rd International Conference on Scientific and Academic Research ICSAR 2023

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Özet -Önceleri kullanılan yöntemler; statik ve prying kuvvetleri barındıran varsayımlara dayanıyordu. Yeni denklemler geliştirmek için sonlu elemanlar analizi ve akma çizgisi teorisine dayanmaktadır.Akma çizgisi yöntemi, rijitlik levhalı alın levha bağlantıları da dahil olmak üzere çeşitli yapısal elemanların analizinde yaygın olarak kullanılmaktadır. Rijitlik levhalı alın levha bağlantıları için akma çizgisi yöntemi, alın levhada ve bağlı kiriş veya kolonlarda oluşan akma çizgilerinin analizini içerir. Bu akma çizgileri, birleşimin göçmeye yakın alanlarını gösterir. Kritik akma çizgilerini belirleyerek, göçme meydana gelmeden önce birleşimin dayanabileceği maksimum yük hesaplanabilir. Bu tür bağlantılar için farklı yükleme şartlarında davranışını analiz etmede akma çizgileri yöntemi etkili olduğunu belirlenmiştir. Bu çalışmada akma çizgisinin ve hesap yöntemlerinin rijitlik levhalı alın levhalı bağlantılarındaki önemini vurgulamak için araştırma yapılmıştır. Öncelikle yönetmeliklerde kullanılan esaslar incelenmiştir. Ayrıca bu tür bağlantılar hakkında litaretürde yapılmış bazı deneysel, analitik ve numerik çalışmaların irdelenmiştir. Sonuç olarak akma çizgisi yöntemi bu tür bağlantılarda sık kullanılmaktadır.

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“…Most of the research was focused on the application of these methods to the analysis of structures with semi-rigid joints [2][3][4][5][6][7][8][9][10][11]. By the 1960s, the matrix stiffness method of structural analysis utilizing computers had been established.…”

Section: Introductionmentioning

confidence: 99%

Numerical model of beem-to-column joint finite stifness

2019

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Introduction. One of the greatest accents in the steel structures researches is the optimization of the design model. It is possible to reduce the cost of steel structures, optimize moment distribution and dynamic characteristics of the frame using the finite secant stiffness, which can be obtained by the described in the paper numerical modeling method. There are a lot of perspectives for the engineer in the field of numerical modeling. Most of them are possible to implement in the design procedure nowadays, but it is important to develop methods and standards for numerical modeling, in order to obtain convenient tools and reliable results. In order to study this issue in more depth, the “moment - turn” curve was studied, maximum stress values were determined, and rigidity and strength characteristics were prepared for each type of joint for structural analysis. Materials and methods. In the program Ansys was modelling three types of steel joints: end-plate connections, double web-angle connections and top and seat angle connections. Results. For three types of joints was obtained ultimate moment, location of destruction and moment-rotation curve. For extended end-plate connections was comparison of the obtained curve with experimental data. Conclusions. Three types of steel joints were modeled in the paper. The numerical modeling results show good correlation with the experimental ones. The data about the behavior of the joints were extracted and analyzed. As result, “moment-angle of rotation” curves were obtained. Finite secant stiffness of the joints for considering steel structures was obtained in the analysis. The resulting finite secant stiffness can be used in the steel frames design procedure.

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Finite element analysis of extended stiffened end plate link‐to‐column connections

Cited by 8 publications

References 18 publications

Experimental Study on Energy Dissipation Performance and Failure Mode of Web-Connected Replaceable Energy Dissipation Link

Experimental Study on Energy Dissipation Performance and Failure Mode of Web-Connected Replaceable Energy Dissipation Link

Rijitlik Levhalı Alın Levhalarında Akma Çizgileri ve Hesap Yöntemleri

Numerical model of beem-to-column joint finite stifness

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