Relevant bibliographies by topics / Rotation capacity

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Rotation capacity'

Author: Grafiati
Published: 4 June 2021
Last updated: 21 February 2023

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Journal articles on the topic "Rotation capacity"

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Xu, Y. L., and S. Franconeri. "The capacity of mental rotation." Journal of Vision 14, no. 10 (August 22, 2014): 359. http://dx.doi.org/10.1167/14.10.359.

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King, G. J. W., and M. Laman. "Conventional and centrifuge model studies of the moment carrying capacity of short pier foundations in clay." Canadian Geotechnical Journal 32, no. 6 (December 1, 1995): 976–88. http://dx.doi.org/10.1139/t95-096.

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An experimental investigation into the moment carrying capacity of short rigid pier foundations in saturated clay is described. Scale models of square piers with different breadths and depths were used in both conventional and centrifugal studies. The results show that the relationships between moment and rotation are nonlinear but do not exhibit any peak values, and that moment limits, defined by limiting angular rotations, increase with increases in pier depth and breadth. Empirical equations are derived between moment carrying capacity and pier geometry, for a range of limiting rotations, and a very close fit is demonstrated between the moment–rotation relationships obtained using these equations and the actual data obtained from the model tests. It is shown that, at the same pier rotations, the moment carrying capacities observed in the centrifugal model tests are significantly larger than those in the conventional model tests. Numerical analyses of the prototype geometries were also carried out using a three-dimensional nonlinear finite-element computer program. The results are shown to provide satisfactory agreement with the moment–rotation behaviour and working limits observed in the centrifuge model tests. Thus, even though conventional modelling is usually legitimate for determining the immediate bearing capacity of rigid foundations in saturated clay, their rotational stability is shown to be significantly affected by self-weight stresses. Some of the existing methods for designing short piers subjected to moments are examined and compared with the results from the centrifuge model tests. Key words : pier foundation, clay, moment capacity.
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Riva, P., and M. Z. Cohn. "Rotation capacity of structural concrete members." Magazine of Concrete Research 46, no. 168 (September 1994): 223–34. http://dx.doi.org/10.1680/macr.1994.46.168.223.

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Lafuente, Guillermo, Pedro V. Munuera, Gabriel Dominguez, Maria Reina, and Blanca Lafuente. "Hallux Limitus and Its Relationship with the Internal Rotational Pattern of the Lower Limb." Journal of the American Podiatric Medical Association 101, no. 6 (November 1, 2011): 467–74. http://dx.doi.org/10.7547/1010467.

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Background: The aims of this study were to determine whether individuals with mild hallux limitus show a diminished capacity of internal rotation of the lower limb compared with those without hallux limitus and whether individuals with mild hallux limitus show an increased foot progression angle. Methods: In 80 study participants (35 with normal feet and 45 with mild hallux limitus), the capacity of internal rotation of the lower limb (internal rotational pattern), hallux dorsiflexion, and the foot progression angle were measured. The values for internal rotational pattern and foot progression angle were compared between the two study groups, and the correlations between these variables were studied. Results: The capacity of internal rotation of the lower limb was significantly lesser in patients with mild hallux limitus (P < .0001). There was no significant difference in foot progression angle between the two groups (P = .115). The Spearman correlation coefficient was 0.638 (P < .0001) for the relationship between internal rotational pattern and hallux dorsiflexion. Conclusions: Patients with mild hallux limitus had a lesser capacity of internal rotation of the lower extremity than did individuals in the control group. The more limited the internal rotational pattern of the lower limb, the more limited was hallux dorsiflexion. The foot progression angle was similar in both groups. (J Am Podiatr Med Assoc 101(6): 467–474, 2011)
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Li, Jingyuan, and Zifeng Li. "Applications of the Theory of Continuous Oil Film Lubrication of a Radial Sliding Bearing for Three Combined Conditions." Applied Physics Research 8, no. 2 (February 15, 2016): 22. http://dx.doi.org/10.5539/apr.v8n2p22.

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<p class="1Body">The theory of lubrication of a radial sliding bearing is extended to three cases: the shaft neck rotation and bush rotation bearing, the rotating load bearing, and the floating sleeve bearing. For the bearing with rotating shaft neck and rotating bush, fixing the observer at the bushing can enable the determination, in a simple and more accurate manner, of the bearing capacity of the bearing with the rotating load. As long as a rotating load exists, whirl exists; if the shaft rotation speed is 2 times the load rotation speed, then the eccentricity reaches the maximum.</p>
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Matz, Radosław, Ryszard Błażejewski, Tadeusz Nawrot, and Maciej Pawlak. "Hydraulic Capacity and Efficiency of a Low-Speed Nonpressurized Coil Pump." Water 11, no. 8 (August 10, 2019): 1659. http://dx.doi.org/10.3390/w11081659.

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The paper presents the results of an investigation on hydraulics of a low-speed coil pump for transport of liquids. One of the pump’s advantages is its wide range of potential inclination angles for its rotating shaft, from the horizontal to an almost vertical position. A simplified hydraulic model was developed based on kinematic and geometrical considerations to determine the pump capacity. The model was verified under laboratory conditions using a low-speed coil pump composed of transparent PVC tube (15 mm outer diameter) wound around a cylindrical drum (104 mm external diameter; 550 mm long). Laboratory tests were performed for three angles of inclination of the axis of rotation (20°, 40°, and 60°) and four rotational speeds (10, 20, 30, and 40 rpm). The results of the tests showed satisfactory agreement with the hydraulic model predictions. Energetic efficiency was estimated on the base of electric power measurements and difference of water levels in the two arms of rotating transparent torus, partly filled with water. The hydraulic efficiency of the coil pump is increasing with decreasing rotational speed.
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Dalen, Karl Van, and John MacIntyre. "The rotational behaviour of clipped end plate connections." Canadian Journal of Civil Engineering 15, no. 1 (February 1, 1988): 117–26. http://dx.doi.org/10.1139/l88-013.

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The rotational behaviour of clipped end plate connections was studied by subjecting nine clipped and three conventional or “unclipped” specimens with varying connection geometry to combined shear and moment and obtaining the corresponding moment–rotation characteristics. It was found that the clipped end plate connections in this investigation had more than adequate rotation capacity to permit an interior beam connected to a supporting member by this type of connection to achieve its full plastic moment, provided the length-to-depth ratio of the beam does not exceed 20. For the range of rotations that would be experienced by clipped end plate connections in a practical structure, a model originally developed to predict the moment–rotation behaviour of conventional shear end plate connections was modified so as to be applicable to clipped end plate connections. Good agreement was obtained between the test values and those predicted by the modified model. No adverse effect on the rotational behaviour of the connections was observed to result from the asymmetry caused by clipping the end plate. Key words: beams, bolts, columns, connections, fillet welds, limit states design, moment, rotation, shear tests, steel construction.
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Slătineanu, Laurenţiu, Oana Dodun, Margareta Coteaţă, Gheorghe Nagîţ, and Irina Beşliu. "Simplified Version of Polymer Rotational Molding Manufacturing Method." Key Engineering Materials 699 (July 2016): 97–103. http://dx.doi.org/10.4028/www.scientific.net/kem.699.97.

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Rotational molding is a manufacturing method which supposes the rotation of the mold, during the solidification of the liquid phase material, so that finally a part having a hollow could be obtained. The method could be applied in manufacturing of metallic and nonmetallic parts. Usually, the equipment for rotational molding ensures slow speed rotating of the mold around two axes placed perpendicularly each other and this fact led to relatively complex equipment for achieving rotational molding. The capacity of the liquid material to entirely cover the internal walls of the mold depends essentially on the liquid material viscosity, on the rotation speed and on the movements applied to the mold. Simplified equipment including a single rotation movement could be materialized. In order to test such a solution, a preliminary experiment was designed and materialized, by using a device adapted on universal lathe. Thus, the objective of the research presented in the paper was to study if it is possible to achieve plastic parts made by rotational molding using a single rotation movement. A polyurethane resin obtained from two liquid components was used in order to obtain the liquid material that could be introduced in the mold. The research results proved the possibility to use simplified equipment for achieving a rotational molding process, at least in certain cases and with some technological limits.
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Xu, Yangqing, and Steven L. Franconeri. "Capacity for Visual Features in Mental Rotation." Psychological Science 26, no. 8 (July 14, 2015): 1241–51. http://dx.doi.org/10.1177/0956797615585002.

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Beg, Darko, Erik Zupančič, and Ioannis Vayas. "On the rotation capacity of moment connections." Journal of Constructional Steel Research 60, no. 3-5 (March 2004): 601–20. http://dx.doi.org/10.1016/s0143-974x(03)00132-9.

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Dissertations / Theses on the topic "Rotation capacity"

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Couchman, Graham H. Couchman Graham. "Design of continuous composite beams allowing for rotation capacity /." Lausanne : EPFL, 1995. http://library.epfl.ch/theses/?nr=1308.

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Yang, Jie. "Structural behaviour of concrete-filled elliptical column to I-beam connections." Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/16022.

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Concrete-filled tubular (CFT) columns have been widely adopted in building structures owing to their superior structural performance, such as enhanced load bearing capacity, compared to hollow tubes. Circular, square and rectangular hollow sections are most commonly used in the past few decades. Elliptical hollow section (EHS) available recently is regarded as a new cross-section for the CFT columns due to its attractive appearance, optional orientation either on major axis or minor axis and improved structural efficiency. The state of the research in terms of elliptical columns, tubular joints between EHSs and connections with CFT columns, etc., are reviewed in this thesis, showing a lack of investigations on EHSs, especially on beam to elliptical column connections which are essential in framed structures. The structural behaviour of elliptical column to I-beam connections under bending is studied in this thesis to fill the research gap. Overall ten specimens with various joint assemblies were tested to failure to highlight the benefits of adopting concrete infill and stiffeners in the columns. A three-dimensional finite element model developed by using ABAQUS software is presented and verified against obtained experimental results, which shows acceptable accuracy and reliability in predicting failure modes of the connections and their moment capacities. Parametric studies were performed to access the main parameters that affecting the bending behaviour of the connections. A simple hand calculation method in terms of ultimate moment capacity is proposed according to experiments conducted for connections with concrete-filled columns.
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Borges, Luís António Costa. "Probabilistic evaluation of the rotation capacity of steel joints = Avaliação probabilistica da capacidade de rotação de ligações metálicas." Master's thesis, Departamento de Engenharia Civil, 2003. http://hdl.handle.net/10316/15652.

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Buchaim, Roberto. "A influência da não-linearidade física do concreto armado na rigidez à flexão e na capacidade de rotação plástica." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-02102001-155513/.

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O presente trabalho é uma contribuição para o esclarecimento e a quantificação das influências na deformabilidade e na capacidade portante de elementos unidimensionais de concreto armado em solicitação plana, decorrentes da não-linearidade física dos materiais concreto e aço, bem como da fissuração e do enrijecimento da armadura tracionada, também na sua fase plástica. Para aplicações práticas determinam-se a rigidez à flexão e a capacidade de rotação plástica dos elementos estruturais, o que permite limitar com mais precisão e coerência a demanda de rotação plástica obtida na análise. De início, descrevem-se os comportamentos não-lineares do concreto e do aço, aplicando-se conceitos da Mecânica da Fratura, bem como a atuação conjunta destes materiais, sob os aspectos de aderência e de fissuração. O núcleo deste trabalho concentra-se na obtenção do diagrama momento-curvatura e dos seus pontos principais, e na subseqüente determinação da capacidade de rotação plástica dos mencionados elementos. Consideram-se as seções geradas a partir da seção duplo T assimétrico, com várias camadas de armadura, sujeitas à flexão composta normal. Com dados deste diagrama e através do modelo da viga equivalente simétrica, posteriormente estendido à viga equivalente assimétrica e às vigas contínuas de pórticos planos, determina-se a capacidade de rotação plástica, considerando-se nesta suas múltiplas influências. Por fim, comparam-se os resultados teóricos e experimentais da capacidade de rotação plástica, e resumem-se as principais conclusões encontradas e os pontos que exigem subseqüente desenvolvimento.
The present study is a contribution to the enlightenment and evaluation of the influences on deformability and load carrying capacity of one-dimensional elements of reinforced concrete subject to in-plane loading, arisen from the constitutive non-linearity of concrete and steel, as well as from the concrete cracking and the tension stiffening of the reinforcement, prior and after yielding. For practical applications, the flexural rigidity and the plastic rotation capacity of structural elements are determined, which makes it possible to limit, more precisely and coherently, the plastic rotation demand coming from the analysis. Firstly, the non-linear behaviors of concrete and steel are described, applying concepts of Fracture Mechanics, and then the joint action of both materials concerning bond and cracking is studied. The core of this study lies on obtaining the bending moment-curvature diagram, specially its main points, and on the subsequent determination of the plastic rotation capacity of the aforementioned elements. The cross-sections generated from an asymmetric double T cross-section are considered, with several layers of reinforcement, acted upon simple or combined bending about one principal axis. With data based on this diagram and through the model of equivalent symmetric beam, later extended to equivalent asymmetric beam and to continuous beams of plane frames, the plastic rotation capacity is determined, considering its multiple influences. Finally, theoretical and experimental results of plastic rotation capacity are compared, and the main conclusions and points in need of subsequent development are summarized.
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Михалчич, Ганна Юріївна. "Обґрунтування параметрів і розробка інтегрального приводу головного руху горизонтально-фрезерного верстату." Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2018. http://elartu.tntu.edu.ua/handle/lib/24123.

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Михалчич Г.Ю. Обґрунтування параметрів та розробка інтегрального приводу головного руху горизонтально-фрезерного верстату. Спец. 133 – Галузеве машинобудування; Тернопільський національний технічний університет імені Івана Пулюя; м. Тернопіль, 2018р.
Mychaltchytch H.Yu. Substantiation of parameters and development of integral main motion drive of horizontal milling machine.
У дипломній роботі проведено аналіз структур приводів головного руху горизонтально-фрезерних верстатів. На основі здійсненого аналізу можливостей різних типів інструментальних матеріалів встановлено граничні частоти обертання шпинделя та необхідну максимальну потужність різання. Здійснено обґрунтування структури безступеневої частини приводу головного руху з використанням методу морфологічного аналізу. Проведено обґрунтування компоновки шпиндельного вузла на основі розробленої математичної моделі, що 8 враховує кількість підшипників в передній опорі, їх натяг, а також відстань між ними. На основі даної моделі здійснено розрахунки радіальної жорсткості шпиндельного вузла для різних його компонувальних схем. Вибрано оптимальну структуру шпиндельного вузла, а також загальну структуру приводу. Розроблено конструкції коробки швидкостей та шпиндельного вузла верстату.
Analysis of the design of the main motion drive of the horizontal milling machines is carried out in this graduation thesis. The boundary frequencies of the spindle rotation and the required maximum cutting power are determined on the basis of the carried out analysis of the possibilities of different tool materials types. The substantiation of the spindle unit arrangement is carried out on the basis of the developed mathematical model taking into account the number of bearings in the front support, their tension as well as the distance between them. The calculations of the spindle unit radial stiffness for its various arrangement schemes on the basis of the given model are performed. Both the optimal structure of the spindle unit and the drive general structure are found. The designs of the gearbox and machine tool spindle unit are developed.
Вступ, Аналітичний розділ, Обґрунтування формоутворення та компонувальної схеми, Обґрунтування кінематичних та силових параметрів приводу головного руху проектованого верстата, Науково-дослідний розділ, Конструкторський розділ, Обґрунтування економічної ефективності; Охорона праці та безпека в надзвичайних ситуаціях; Екологія; Висновки,
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Acun, Bora. "Energy Based Seismic Performance Assessment Of Reinforced Concrete Columns." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611728/index.pdf.

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Severe seismic events in urban regions during the last two decades revealed that the structures constructed before the development of modern seismic codes are the most vulnerable to earthquakes. Sub-standard reinforced concrete buildings constitute an important part of this highly vulnerable urban building stock. There is urgent need for the development and improvement of methods for seismic performance assessment of existing reinforced concrete structures. As an alternative to current conventional force-based assessment methods, a performance evaluation procedure for structural members, mainly reinforced concrete columns is proposed in this study, by using an energy-based approach combined with the low cycle fatigue concept. An energy-based hysteresis model is further introduced for representing the inelastic response of column members under severe seismic excitations. The shape of the hysteresis loops are controlled by the dissipated cumulative energy whereas the ultimate strength is governed by the low cycle fatigue behavior. These two basic characteristics are obtained experimentally from full scale specimens tested under constant and variable amplitude displacement cycles. The first phase of the experimental program presented in the study constitutes of testing sub-standard non-conforming column specimens. The second phase of testing was conducted on standard, code compliant reinforced concrete columns. A total number of 13 specimens were tested. The behavior of these specimens was observed individually and comparatively according to the performance based objectives. The results obtained from the experiments were employed for developing relations between the energy dissipation capacity of specimens, the specimen properties as well as the imposed displacement history. Moreover, the measured rotation capacities at the plastic regions are evaluated comparatively with the limits proposed by modern displacement-based seismic design and assessment provisions.
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Habacha, Hamdi. "Effets croisés de l’expertise physique et des caractéristiques des tâches sur la capacité de rotation mentale." Caen, 2014. http://www.theses.fr/2014CAEN2051.

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Les recherches sur l’implication des processus moteurs lors des tâches de rotation mentale ne sont pas consensuelles. Selon la revue de littérature, ces divergences semblent être dues aux différences de tâches utilisées (nature des stimuli, types de jugement, caractéristiques des stimuli) impliquant différentes stratégies mentales. L’objectif de ce travail de thèse est de préciser la place des processus moteurs dans la rotation mentale par l’étude des effets de la pratique sportive. Plus précisément, il s’agit d’identifier les conditions permettant de mettre en évidence des effets sélectifs de différentes pratiques sportives dans une tâche de rotation mentale. Les résultats de ce travail montrent que l’utilisation de représentations corporelles avec un jugement de latéralité permet de révéler les effets sélectifs des pratiques sportives par l’utilisation de stratégies égocentriques et d’embodiment. De plus, ces stratégies semblent être influencées par le réalisme des stimuli. Ces résultats attestent de l’implication des processus moteurs dans ces tâches
Research on the involvement of motor processes during mental rotation tasks is not consensual. According to the literature, this lack of consensus seems to be due to differences in the tasks used (type of stimuli, types of judgment, stimuli features) involving different mental strategies. Our aim is to clarify the role of motor processes in mental rotation by studying the effects of sport on mental rotation ability. Specifically, we tried to identify the tasks requirements to highlight selective effects of different sporting activities in a mental rotation task. The results of this work show that the use of body stimuli with a laterality judgment would engage egocentric strategies and embodiment allowing revealing selective effects of sports. Further, theses strategies appear to be affected by the stimuli realism. These results indicate the involvement of motor processes in these tasks
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Wilkinson, Timothy James. "The Plastic Behaviour of Cold-Formed Rectangular Hollow Sections." University of Sydney. Department of Civil Engineering, 2000. http://hdl.handle.net/2123/843.

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The aim of this thesis is to assess the suitability of cold-formed rectangular hollow sections (RHS) for plastic design. The project involved an extensive range of tests on cold-formed Grade C350 and Grade C450 (DuraGal) RHS beams, joints and frames. A large number of finite element analyses was also carried out on models of RHS beams. The conclusion is that cold- formed RHS can be used in plastic design, but stricter element slenderness (b/t) limits and consideration of the connections, are required. Further research, particularly into the effect of axial compression on element slenderness limits, is required before changes to current design rules can be finalised. Bending tests were performed on cold-formed RHS to examine the web and flange slenderness required to maintain the plastic moment for a large enough rotation suitable for plastic design. The major conclusions of the beam tests were: (i) Some sections which are classified as Compact or Class 1 by current steel design specifications do not maintain plastic rotations considered sufficient for plastic design. (ii) The current design philosophy, in which flange and web slenderness limits are independent, is inappropriate. An interaction formula is required, and simple formulations are proposed for RHS. Connection tests were performed on various types of knee joints in RHS, suitable for the column - rafter connection in a portal frame. The connection types investigated were welded stiffened and unstiffened rigid knee connections, bolted plate knee joints, and welded and bolted internal sleeve knee joints, for use in RHS portal frames. The ability of the connections to act as plastic hinges in a portal frame was investigated. The most important finding of the joint tests was the unexpected fracture of the cold-formed welded connections under opening moment before significant plastic rotations occurred. The use of an internal sleeve moved the plastic hinge in the connection away from the connection centre- line thus eliminating the need for the weld between the RHS, or the RHS and the stiffening plate, to carry the majority of the load. The internal sleeve connections were capable of sustaining the plastic moment for large rotations considered suitable for plastic design. Tests on pinned-base portal frames were also performed. There were three separate tests, with two different ratios of vertical to horizontal point loads, simulating gravity and horizontal wind loads. Two grades of steel were used for comparison. The aims of the tests were to examine if a plastic collapse mechanism could form in a cold-formed RHS frame, and to investigate if plastic design was suitable for such frames. In each frame, two regions of highly concentrated curvature were observed before the onset of local buckling, which indicated the formation of plastic hinges and a plastic collapse mechanism. An advanced plastic zone structural analysis which accounted for second order effects, material non-linearity and member imperfections slightly overestimated the strength of the frames. The analysis slightly underestimated the deflections, and hence the magnitude of the second order effects. A second order plastic zone analysis, which did not account for the effects of structural imperfections, provided the best estimates of the strengths of the frames, but also underestimated the deflections. While cold-formed RHS did not satisfy the material ductility requirements specified for plastic design in some current steel design standards, plastic hinges and plastic collapse mechanisms formed. This suggests that the restriction on plastic design for cold-formed RHS based on insufficient material ductility is unnecessary, provided that the connections are suitable for plastic hinge formation, if required. A large number of finite element analyses were performed to simulate the bending tests summarised above, and to examine various parameters not studied in the experimental investigation. To simulate the experimental rotation capacity of the RHS beams, a sinusoidally varying longitudinal local imperfection was prescribed. The finite element analysis determined similar trends as observed experimentally, namely that the rotation capacity depended on both the web slenderness and flange slenderness, and that for a given section aspect ratio, the relationship between web slenderness and rotation capacity was non-linear. The main finding of the finite element study was that the size of the imperfections had an unexpectedly large influence on the rotation capacity. Larger imperfections were required in the more slender sections to simulate the experimental results. There should be further investigation into the effect of varying material properties on rotation capacity.
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Wilkinson, Timothy James. "The Plastic Behaviour of Cold-Formed Rectangular Hollow Sections." Thesis, The University of Sydney, 1999. http://hdl.handle.net/2123/843.

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The aim of this thesis is to assess the suitability of cold-formed rectangular hollow sections (RHS) for plastic design. The project involved an extensive range of tests on cold-formed Grade C350 and Grade C450 (DuraGal) RHS beams, joints and frames. A large number of finite element analyses was also carried out on models of RHS beams. The conclusion is that cold- formed RHS can be used in plastic design, but stricter element slenderness (b/t) limits and consideration of the connections, are required. Further research, particularly into the effect of axial compression on element slenderness limits, is required before changes to current design rules can be finalised. Bending tests were performed on cold-formed RHS to examine the web and flange slenderness required to maintain the plastic moment for a large enough rotation suitable for plastic design. The major conclusions of the beam tests were: (i) Some sections which are classified as Compact or Class 1 by current steel design specifications do not maintain plastic rotations considered sufficient for plastic design. (ii) The current design philosophy, in which flange and web slenderness limits are independent, is inappropriate. An interaction formula is required, and simple formulations are proposed for RHS. Connection tests were performed on various types of knee joints in RHS, suitable for the column - rafter connection in a portal frame. The connection types investigated were welded stiffened and unstiffened rigid knee connections, bolted plate knee joints, and welded and bolted internal sleeve knee joints, for use in RHS portal frames. The ability of the connections to act as plastic hinges in a portal frame was investigated. The most important finding of the joint tests was the unexpected fracture of the cold-formed welded connections under opening moment before significant plastic rotations occurred. The use of an internal sleeve moved the plastic hinge in the connection away from the connection centre- line thus eliminating the need for the weld between the RHS, or the RHS and the stiffening plate, to carry the majority of the load. The internal sleeve connections were capable of sustaining the plastic moment for large rotations considered suitable for plastic design. Tests on pinned-base portal frames were also performed. There were three separate tests, with two different ratios of vertical to horizontal point loads, simulating gravity and horizontal wind loads. Two grades of steel were used for comparison. The aims of the tests were to examine if a plastic collapse mechanism could form in a cold-formed RHS frame, and to investigate if plastic design was suitable for such frames. In each frame, two regions of highly concentrated curvature were observed before the onset of local buckling, which indicated the formation of plastic hinges and a plastic collapse mechanism. An advanced plastic zone structural analysis which accounted for second order effects, material non-linearity and member imperfections slightly overestimated the strength of the frames. The analysis slightly underestimated the deflections, and hence the magnitude of the second order effects. A second order plastic zone analysis, which did not account for the effects of structural imperfections, provided the best estimates of the strengths of the frames, but also underestimated the deflections. While cold-formed RHS did not satisfy the material ductility requirements specified for plastic design in some current steel design standards, plastic hinges and plastic collapse mechanisms formed. This suggests that the restriction on plastic design for cold-formed RHS based on insufficient material ductility is unnecessary, provided that the connections are suitable for plastic hinge formation, if required. A large number of finite element analyses were performed to simulate the bending tests summarised above, and to examine various parameters not studied in the experimental investigation. To simulate the experimental rotation capacity of the RHS beams, a sinusoidally varying longitudinal local imperfection was prescribed. The finite element analysis determined similar trends as observed experimentally, namely that the rotation capacity depended on both the web slenderness and flange slenderness, and that for a given section aspect ratio, the relationship between web slenderness and rotation capacity was non-linear. The main finding of the finite element study was that the size of the imperfections had an unexpectedly large influence on the rotation capacity. Larger imperfections were required in the more slender sections to simulate the experimental results. There should be further investigation into the effect of varying material properties on rotation capacity.
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Abrahamsson, Jenny, and Fleur Filip la. "The impact of connection stiffness on the global structural behavior in a CLT building : A combined experimental-numerical study." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105166.

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Cross Laminated Timber (CLT) has in recent years become a more important building material. This means that the demand for accurate calculation methods in building standards such as Eurocode 5 has increased. There is limited knowledge about the connections in CLT buildings which is an important part of a CLT structure. This thesis was therefore focused on investigating a wall-floor-wall type connection commonly found in platform type buildings.  An experimental and numerical study on typical wall-floor-wall connections was carried out in this thesis. In the experimental part 60 tests with 8 different configurations were conducted to investigate the influence of different parameters on the connection, moment capacity and rotational stiffness. During the tests the deformation of the specimens under four load levels were investigated. Compression tests were also performed on the specimens to determine the compressive strength and stiffness of the elements. In the numerical part two different models for the connection were created. One simplified model with rotational springs and one more complex model with compression springs. With these models the influence from the number of stories, span and thickness of the wall on the global behavior of a structure was investigated.  The result from this thesis shows that there is both moment capacity and rotational stiffness in the wall-floor-wall type connection that can be utilized in the design phase of a structure. This was proven by both the experimental and the numerical study. The parameters that influence the behavior of the connection most were the load level applied on the wall and the wall thickness. The model created in the numerical study showed great potential regarding the replication of the connection behavior observed in the experimental study.
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Books on the topic "Rotation capacity"

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Vallejo Maldonado, Pablo Ramon, and Nikolay Chaynov. Kinematics and dynamics of automobile piston engines. ru: INFRA-M Academic Publishing LLC., 2019. http://dx.doi.org/10.12737/989072.

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The fundamentals of kinematics and dynamics of transport piston internal combustion engines made using different layout schemes are presented. Along with the traditional in-line, V-shaped, including oppositional, arrangement of cylinders, schemes with "staggered" arrangement of cylinders in the block at the displaced connecting rod necks of the crankshaft of the engine are considered. The kinematics of the coaxial crank mechanism is considered in detail. The questions of dynamics with reduction of calculated dependences of forces, moments, a choice of a rational order of work of cylinders in relation to the considered kinematic schemes are in detail stated. Considerable attention is paid to the unevenness of the crankshaft rotation speed and engine balancing. The loads on the main and connecting rod bearings of the crankshaft, the knowledge of which is necessary in determining the bearing capacity of bearing units, are also considered. Meets the requirements of the Federal state educational standards of higher education of the last generation. For students of higher educational institutions studying in the direction of training 23.03.03 "Operation of transport and technological machines and complexes" and related areas.
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Structural Dependence of Rotation Capacity of Plastic Hinges in Rc Beams and Slabs. Delft Univ Pr, 1999.

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Bachmann, Hugo. Influence of Shear and Band on Rotational Capacity of Reinforced Concrete Beams. Springer London, Limited, 2013.

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Book chapters on the topic "Rotation capacity"

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Kuhlmann, U., and F. Kühnemund. "Procedures to Verify Rotation Capacity." In Semi-Rigid Joints in Structural Steelwork, 167–225. Vienna: Springer Vienna, 2000. http://dx.doi.org/10.1007/978-3-7091-2478-9_3.

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Gioncu, V., L. Tîrcă, and D. Petcu. "Rotation capacity of rectangular hollow section beams." In Tubular Structures VII, 387–95. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203735008-58.

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Gioncu, V., L. Tîrcă, and D. Petcu. "Rotation capacity of rectangular hollow section beams." In Tubular Structures VII, 387–95. London: Routledge, 2022. http://dx.doi.org/10.1201/9780203735008-58.

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Kuzu, Takuzo, Hitoshi Oki, Ishihama Yoshiro, and Nguyen Thi Tuyet Trinh. "Evaluation of Bearing Capacity of Steel Rotation Pile." In Lecture Notes in Civil Engineering, 169–76. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-2184-3_21.

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Stranghöner, Natalie, Gerhard Sedlacek, and Philippe Boeraeve. "Rotation requirement and rotation capacity of rectangular, square and circular hollow section beams." In Tubular Structures VI, 143–50. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203735015-22.

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Como, Mario. "On the Rotation Capacity of Reinforced Concrete Structural Elements." In Solid Mechanics and Its Applications, 67–79. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-015-9930-6_6.

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Kuhlmann, U., and F. Kühnemund. "Rotation Capacity of Steel Joints: Verification Procedure and Component Tests." In The Paramount Role of Joints into the Reliable Response of Structures, 363–72. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-010-0950-8_31.

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Prabhakara, R., B. Nambiyanna, R. Nakul, and Bharathi Ganesh. "Analysis of Rotation Capacity of RC Beams Over Formation of Plastic Hinges." In Lecture Notes on Multidisciplinary Industrial Engineering, 259–66. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3254-2_24.

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Prakash, M. R., Katta Venkataramana, R. Prabhakara, and B. Manjunatha. "Studies on Rotation Capacity and Torsional Strength of Normal, Medium- and High-Strength RC Beams." In Lecture Notes in Civil Engineering, 185–96. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5195-6_14.

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Stutzki, Ch, and G. Sedlacek. "A Numerical Method for the Determination of the Moment-Rotation-Capacity of Thin Walled Members." In Numerical Techniques for Engineering Analysis and Design, 355–61. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3653-9_41.

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Conference papers on the topic "Rotation capacity"

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Xu, Yan, Zunce Wang, Fengxia Lv, and Sen Li. "Study on Characteristics and Operating Parameters of Axial Rotating Hydrocyclone." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79114.

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The axial rotation of the hydrocyclone affects its internal flow characteristics and separating effect directly, as some local applications require the static hydrocyclone rotates about its own axis. Based on CFD, velocity distribution in the axial rotating hydrocyclone is studied. It is shown that as the rotation speed increasing, the tangential velocity improves and its gradient reduces in free vortex region observably, while the radial velocity has an incremental trend in the section of the small cone. The laboratory experiments are carried out for the static hydrocyclone of disposal capacity of 4 m3/h at 100r/min ∼ 300r/min. The relationships among rotation speed, flowrate, pressure drop and separated efficiency are achieved, which agree well with the numerical simulation results. The results indicate that the disposal capacity of hydrocyclone subjected to the rotation wall can be more flexible than that with no-rotating wall, the scope of best disposal capacity gradually enlarges with the increase of rotation speed of wall. Appropriate rise of the rotation speed is favor of the separation efficiency at the steady flowrate, however the increase of the flowrate and rotation speed induces the growth of the hydrocyclone’s pressure drop correspondingly to some extent.
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Lee, Kyungkoo, and Bozidar Stojadinovic. "Rotation Capacity of Pre-Qualified Moment Connections: A Yield Line Approach." In Research Frontiers at Structures Congress 2007. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40944(249)34.

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Megalooikonomou, Konstantinos G., Stavroula J. Pantazopoulou, and Souzana P. Tastani. "A MECHANISTIC APPROACH IN DEFINING INELASTIC ROTATION CAPACITY OF RC COLUMNS." In 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2017. http://dx.doi.org/10.7712/120117.5603.16683.

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Cui, Guohua, and Yanwei Zhang. "Analysis of Load Capacity on Spatial Rotation 4-SPS-S Parallel Manipulator." In 2010 Second International Conference on Computer Modeling and Simulation (ICCMS). IEEE, 2010. http://dx.doi.org/10.1109/iccms.2010.209.

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Duarte da Costa, Job, Renata Obiala, and Christoph Odenbreit. "A new method to assess the stiffness and rotation capacity of composite joints." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7082.

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Composite beam-to-column joints in buildings are mostly modelled as pinned joints in order to facilitate the design of the structure. In reality, due to the required reinforcement in the concrete slab, a certain joint rigidity and bending resistance is always available. The real joint behaviour corresponds therefore more to that of a semi-continuous joint. This is not only beneficial for the serviceability limit state but can also be advantageous at ultimate limit state. However, due to the lack of analytical design rules in EN 1994 to verify the rotation capacity of semi-continuous joints, these are commonly modelled as pinned joints, which impedes an efficient design of composite structures. In this context, a research program on the behaviour of composite joints, focusing on the ultimate rotation capacity, was initiated at the University of Luxembourg [1]. The aim was to identify the influence of two major joint components – the reinforced concrete slab and the steelwork connection – on the moment-rotation curves of composite joints under hogging bending moment. An experimental campaign comprising 8 tests on beam-to-column joints was conducted to determine the response of composite joints with variable reinforcement ratio and diameter of reinforcing bars. In addition to the experimental part, an FE model was developed with the software ABAQUS aiming to simulate the behaviour of internal beam-to-column composite joints. In this paper, the 3D finite element model and results of analyses are presented. The FE model has been defined by 3D solid elements with realistic contact definitions and non-linear material laws. The results of the numerical simulations presented a good agreement with the experimental data. Based on the experimental and numerical investigations, the influence of reinforcement and steelwork connection on the structural properties of composite joints is derived. A new analytical method to determine the stiffness and rotation capacity of composite joints is proposed. The accuracy of this new method is confirmed by existing experimental and numerical results.
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"Infl uence of Transversal Reinforcement on Plastic Rotation Capacity of High-Strength Beams." In SP-253: Fifth ACI/CANMET/IBRACON Int'l Conference on High-Performance Concrete Structures & Materials. American Concrete Institute, 2008. http://dx.doi.org/10.14359/20182.

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"Bond Influence on Rotation Capacity of High-Strength and and Normal Strength Beams." In SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures. American Concrete Institute, 1999. http://dx.doi.org/10.14359/5559.

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Weber, Felix, Florian Obholzer, Peter Huber, Christian Braun, Leopold Meier, Manfred Hartinger, and Johann Distl. "New Adaptive Pendulum: Reduced Structural Acceleration, Base Shear, Displacement Capacity and Improved Rotation Capability." In IABSE Symposium, Nantes 2018: Tomorrow’s Megastructures. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/nantes.2018.s4-9.

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Garcia, Sergio, Michael Mendez, Ramadan Ahmed, Hamidreza Karami, Mustafa Nasser, and Ibnelwaleed Hussein. "Effects of Pipe Rotation on the Performance of Fibrous Fluids in Horizontal Well Cleanout." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210347-ms.

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Abstract The deposition of rock cuttings is a problem commonly faced during drilling, completion, and intervention operations. Using polymer-based fluids is a common technique to improve horizontal downhole cleaning. However, these fluids cannot always guarantee an efficient wellbore cleanout. One way to enhance cleanout efficiency is by rotating the drill pipe to mitigate the settling of solids and facilitate their removal. However, drill string rotation often increases equivalent circulating density (ECD). Therefore, this study explores how the impact of rotation on hole cleaning can be synergized by using fibrous fluids to perform cleanout at reduced rotational speeds with limited impact on ECD. The flow loop utilized for this study consists of a 48-ft long eccentric annular (5" × 2.375") test section. Each experiment began by forming a stationary bed of natural sand (average diameter of 1.2 mm) in the test section. High-viscosity and low-viscosity polymer-based suspensions with and without fibers were used. Drill pipe rotation speed was varied from 0 to 150 rpm. In each experiment, the flow rate was increased from 35 to 195 gpm stepwise. The equilibrium bed perimeter was measured at every test flowrate until a complete bed cleanout was achieved. As part of the test, flow rate, pressure gradient, and equilibrium bed height were measured. Rotational viscometers were used to measure fluid rheology before and after each test. Fiber particles improve the carrying capacity of the fluid by reducing the settling of solids and minimizing the re-deposition of particles. The results demonstrate the effectiveness of fiber in synergizing the effect of pipe rotation on hole cleanout performance in horizontal wellbores. The impact of fiber is more pronounced when used with low viscosity fluid. The cleanout performance of the low-viscosity fluid amplified significantly with rotation, almost entirely cleaning the bed at 75 gpm and a rotational speed of 50 RPM, compared to more than 195 gpm without rotation. Even more improvement could be achieved by adding a small amount of fiber (0.04% wt/wt). Furthermore, the fiber improved the cleanout performance of the high-viscosity fluid. The enhancement, however, was not as noticeable as with the low-viscosity fluid. In general, rotation combined with low-viscosity fibrous fluid exhibits the most effective sand cleaning performance. Rotating the pipe re-suspends the settled solids, which are then carried away by the fluids. Fiber particles enhance the fluid's ability to carry solids.
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Hoffmann, Nadine, and Ulrike Kuhlmann. "Design of steel and composite structures for robustness." In IABSE Workshop, Helsinki 2017: Ignorance, Uncertainty, and Human Errors in Structural Engineering. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2017. http://dx.doi.org/10.2749/helsinki.2017.118.

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The paper briefly reports on investigations concerning the robustness of steel and composite structures. When applying the alternate load path method for redistributing the loads resulting from a column loss especially the detailed consideration of the behaviour of beam‐to‐column joints is important. A crucial aspect is the investigation of the available rotation capacity of the joints as well as the required rotation capacity of the joints. Finally a method is presented that can be used in order to verify the rotation capacity for permanent load situation as well as for accidental load situations.
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Reports on the topic "Rotation capacity"

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CHARACTERISATION OF THE BEHAVIOUR OF BEAM-TO-COLUMN STEEL JOINTS UP TO FAILURE. The Hong Kong Institute of Steel Construction, September 2022. http://dx.doi.org/10.18057/ijasc.2022.18.3.5.

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The design of steel joints is currently dealt with in Eurocode 3 through the well-known “component method”. In particular, Part 1-8 of this standard provides guidance on how to apply the method to a wide range of joint configurations allowing to assess the latter’s initial rotational stiffness and resistance. Nonetheless, whenever a global structural plastic analysis is contemplated, provisions of Eurocode 3 are insufficient since no clear guidance on how to determine the ultimate resistance and the ultimate rotation capacity of joints is provided. In this paper, the full-range behaviour of beam-to-column steel joints is investigated using experimental, analytical, and numerical methods. A new analytical approach based on the component method is proposed and validated against five physical experiments. Through additional analytical expressions for the characterisation of basic components of steel joints, the proposed approach extends the applicability of the component method such that strain-hardening and ductility of components are accounted for. The results show a good agreement between the analytical prediction and the experimental results and also highlight specific limitations of the classical component method. Three-dimensional finite element (FE) models are also employed to simulate the behaviour of the tested beam-to-column joints. The results prove the accuracy of numerical models to simulate the non-linear response of steel joints emphasizing, however, the importance of proper modelling assumptions.
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EXPERIMENTAL STUDIES OF THE SORBITE STAINLESS STEEL PLUG-PIN SCAFFOLD JOINT. The Hong Kong Institute of Steel Construction, December 2022. http://dx.doi.org/10.18057/ijasc.2022.18.4.9.

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Systematic experimental studies were performed for the purpose of obtaining the material properties of cold-formed sorbite stainless steel and the mechanical parameters of plug-pin joint. As a new type of material, the scaffold made of sorbite stainless steel has the advantages of convenient construction, high strength and stainless steel. The static tensile tests for S500 sorbite stainless steel investigating the material characteristics of plug-pin joint were carried out. The bending moment, the compressive force, the tensile force and the shear force were applied to the joint respectively. To get the failure modes and moment-rotation (or load-displacement) curves, the joint behavior, including the semi-rigidity between the ledger and the standard, compression and shear of the standard, and the tension of the ledger joint were studied. The result can determine the load-bearing capacity and the performance of the joint. The joint stiffness was determined according to different methods and four models were proposed to describe the bending behavior. By analyzing the different modes of joint failure, the weak part can be determined to provide basis for actual joint design.
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PARAMETRIC STUDIES ON THE MOMENT RESISTANT BEAMCOLUMN CONNECTION BEHAVIOR OF CONCRETE FILLED DOUBLE STEEL TUBULAR COLUMNS AND I STEEL BEAMS. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.284.

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The configuration of Concrete filled double steel tubular cross-section (CFDST) has the potential to overcome the beam-column connection difficulties found in steel tubular cross-sections. Since experimental parametric studies are expensive, numerical methods are adopted in this study to understand the behavior of beam-CFDST column connection under monotonic and cyclic loading conditions. The connection type is observed to be as semi-rigid as per EN1993-1-8. Parametric study includes design parameters like, concrete infill strength, yield strength of inner steel tube and outer steel tube, hollowness ratio, width to thickness ratio of inner steel tube and outer steel tube, end plate thickness and provision of stiffeners for end plate. Thickening the inner steel tube locally at the bolt location and providing stiffener plate or bracket at the compression zone of the extended end plate improves the rotational capacity of the connection as high as 0.06 rad for full plastic moment capacity of the beam. Recommendations are given for proportioning the connection components like end plates, bolts, inner steel tube and stiffeners for an optimal semi-rigid connection design.
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