Готові списки джерел за темами / Slender beam

Добірка наукової літератури з теми "Slender beam"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Slender beam"

1

Abo‐Hamd, Metwally. "Slender Composite Beam‐Columns." Journal of Structural Engineering 114, no. 10 (October 1988): 2254–67. http://dx.doi.org/10.1061/(asce)0733-9445(1988)114:10(2254).

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2

Olanitori, Lekan Makanju, and Damilola David Fregene. "Behavior of under and over-reinforced concrete slender beams at failure." Nigerian Journal of Technological Research 16, no. 3 (September 28, 2021): 16–22. http://dx.doi.org/10.4314/njtr.v16i3.3.

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The focus of this paper is to examine the behavior of under and over-reinforced concrete slender beams at failure. The total number of the beams were five, with the provision of the following percentage of tension reinforcements: 1.01% for beam 1 (B1), 1.51% for beam 2 (B2), 2.01% for beam 3 (B3), 2.62% for beam 4 (B4) and 3.01% for beam 5 (B5). The beams were loaded with point loads at the center, with shear span/depth ratio of 3.8. The actual ultimate load of the experimental beam B1 was 141% of the estimated ultimate, while for beams B2, B3, B4 and B5, the actual ultimate loads were between 68% and 87% of the estimated ultimate loads for the beams respectively. The reinforced concrete beams B1, B2 and B3 had the capacity to sustain large deformation under constant loads before their ultimate failure, hence will give warning about the impending failure. For beams B4 and B5, although failed at higher loads had limited rotation capacity, hence will not give warnings about the impending failure. Therefore, 2.01% tension reinforcement is recommended as the maximum to be provided, so that the beam section can behave as a ductile section.
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3

Yao, Zhenhan, Xiaoping Zheng, Han Yuan, and Jinlong Feng. "Research progress of high-performance BEM and investigation on convergence of GMRES in local stress analysis of slender real thin-plate beams." Engineering Computations 36, no. 8 (October 7, 2019): 2530–56. http://dx.doi.org/10.1108/ec-10-2018-0477.

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Purpose Based on the error analysis, the authors proposed a new kind of high accuracy boundary element method (BEM) (HABEM), and for the large-scale problems, the fast algorithm, such as adaptive cross approximation (ACA) with generalized minimal residual (GMRES) is introduced to develop the high performance BEM (HPBEM). It is found that for slender beams, the stress analysis using iterative solver GMRES will difficult to converge. For the analysis of slender beams and thin structures, to enhance the efficiency of GMRES solver becomes a key problem in the development of the HPBEM. The purpose of this paper is study on the preconditioning method to solve this convergence problem, and it is started from the 2D BE analysis of slender beams. Design/methodology/approach The conventional sparse approximate inverse (SAI) based on adjacent nodes is modified to that based on adjacent nodes along the boundary line. In addition, the authors proposed a dual node variable merging (DNVM) preprocessing for slender thin-plate beams. As benchmark problems, the pure bending of thin-plate beam and the local stress analysis (LSA) of real thin-plate cantilever beam are applied to verify the effect of these two preconditioning method. Findings For the LSA of real thin-plate cantilever beams, as GMRES (m) without preconditioning applied, it is difficult to converge provided the length to height ratio greater than 50. Even with the preconditioner SAI or DNVM, it is also difficult to obtain the converged results. For the slender real beams, the iteration of GMRES (m) with SAI or DNVM stopped at wrong deformation state, and the computation failed. By changing zero initial solution to the analytical displacement solution of conventional beam theory, GMRES (m) with SAI or DNVM will not be stopped at wrong deformation state, but the stress error is still difficult to converge. However, by GMRES (m) combined with both SAI and DNVM preconditioning, the computation efficiency enhanced significantly. Originality/value This paper presents two preconditioners: DNVM and a modified SAI based on adjacent nodes along the boundary line of slender thin-plate beam. In the LSA, by using GMRES (m) combined with both DNVM and SAI, the computation efficiency enhanced significantly. It provides a reference for the further development of the 3D HPBEM in the LSA of real beam, plate and shell structures.
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4

Zamani, A. R., and S. O. Oyadiji. "Analytical modelling of Kirschner wires in Ilizarov circular external fixator as pretensioned slender beams." Journal of The Royal Society Interface 6, no. 32 (July 22, 2008): 243–56. http://dx.doi.org/10.1098/rsif.2008.0251.

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Transfixing thin Kirschner wires (K-wires) are the key components of the Ilizarov fixator regarding its axial stiffness, which affects the mechanobiological environment in which bone is healed. Mechanically speaking, K-wires are slender beams that are axially tensioned, then fixed and transversely loaded. The existing solutions to such a problem either do not accommodate any axial loading prior to transverse loading, or do not account for the change in the axial load (reaction) due to transverse loading. Their applicability is also limited vis-à-vis applied loads and beam dimensions. This work seeks to address those problems by providing a mathematical formulation for a pretensioned slender beam that accounts for the change in the beam tension due to lateral loading. Central loading of a pretensioned beam was studied and new polynomial equations have been derived, the roots of which yield the final tension for a (i) long, slender and heavily loaded beam and (ii) relatively thicker beam subjected to a lower load. Results were produced and discussed for the specific application of pretensioned K-wires in circular (ring) external fixators in orthopaedics (such as Ilizarov's), which were checked (validated) via two- and three-dimensional finite-element analyses.
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5

Barbulescu, Horatiu, Dan B. Marghitu, and Uday Vaidya. "Spatial Impact of a Slender Beam." Journal of Engineering Materials and Technology 125, no. 4 (September 22, 2003): 368–71. http://dx.doi.org/10.1115/1.1605110.

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In this paper, the dynamics of the spatial impact of a slender beam is analyzed. The equations of motion are calculated using Kane’s impact method. The generalized momentum and generalized impulse of the beam are considered to find the equations of motion of the beam. The frictional phenomenon at the contact point is analyzed. For the case of impact without slipping, it is used the assumption that the tangential component of the velocity of separation is null. In the case with slipping, the tangential impulse (at the plane of impact) is computed. The sliding direction after impact is calculated. A simulation of the impact of beam with a surface is developed and the velocity of separation, force of impact and kinetic energy of the beam after impact are studied for different incident angles of the beam. The incident angle is varied from 0 deg to 57 deg. The results are function of the incident angle of impact.
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6

Jang, Jun Hwan, and Jae Hoon Kim. "EXPERIMENTAL VERIFICATION OF COUPLED STIFFNESS MATRIX IN MULTILAYER COMPOSITE STRUCTURE WITH COMPLEX CURVATURE." International Journal of Modern Physics: Conference Series 06 (January 2012): 634–39. http://dx.doi.org/10.1142/s2010194512003893.

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The paper presents an experimental verification for calculating coupled stiffness matrix in complex curvature composite structure. The results of the analytical procedure using Variational Asymptotic Beam Sectional Analysis also indicate that the calculation of 2-D, beam, cross-sectional properties can then be incorporated into and 1-D beam analysis expressed coupled stiffness matrix. This paper presents the 2-D cross-sectional analysis of active anisotropic beams. Comparison between the analytical and experimental results shows that the proposed analytical procedure can provide an accurate and efficient prediction of the both deflection and flexural stiffness of multilayer composite slender structure. Verified comparison results can be used to efficiently design accurate complex slender structure properties for preliminary design and optimization.
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7

Lefevre, Baptiste, Frédéric Tayeb, Lionel du Peloux, and Jean-François Caron. "A 4-degree-of-freedom Kirchhoff beam model for the modeling of bending–torsion couplings in active-bending structures." International Journal of Space Structures 32, no. 2 (June 2017): 69–83. http://dx.doi.org/10.1177/0266351117714346.

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Gridshells are lightweight structures made of interconnected slender beams. Due to large displacements, high interaction between the beams, and bending–torsion coupling, modeling gridshells requires specific non-linear numerical tools to reach convergence within a reasonable time. In this article, the development of such a tool is presented. It is based on the Kirchhoff beam theory and uses the dynamic relaxation method. First, from Kirchhoff’s equations, the internal forces and moments acting on a beam are obtained. Once this mathematical work is done, the dynamic relaxation method is used in order to get the static equilibrium configuration of the beam. This new approach is tested on several examples and validated for slender beams with arbitrary rest-state configuration and cross sections. In particular, results for ribbons with high bending–torsion coupling are presented. Finally, this process enables the fast and precise modeling of gridshells including bending–torsion coupling.
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8

Celebi, K., and N. Tutuncu. "Free vibration analysis of functionally graded beams using an exact plane elasticity approach." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 14 (January 9, 2014): 2488–94. http://dx.doi.org/10.1177/0954406213519974.

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Exact natural frequencies of functionally graded beams are determined using plane elasticity theory. The analysis yields infinitely many frequencies. For verification purposes, a comparison with the existing beam theory results is performed and a close agreement is observed for slender members. The elasticity solutions are general in the sense that they are valid for slender members as well as short and thick structural elements. Both flexural and axial free vibration mode shapes are presented for top and bottom surfaces and the effect of the beam thickness is discussed. The exact results presented herein can be used as benchmarks for future research of free vibration behavior of short and thick functionally graded material beams.
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9

PATEL, VIPULKUMAR ISHVARBHAI, QING QUAN LIANG, and MUHAMMAD N. S. HADI. "NUMERICAL ANALYSIS OF CIRCULAR CONCRETE-FILLED STEEL TUBULAR SLENDER BEAM-COLUMNS WITH PRELOAD EFFECTS." International Journal of Structural Stability and Dynamics 13, no. 03 (April 2013): 1250065. http://dx.doi.org/10.1142/s0219455412500654.

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This paper presents a new numerical model for the nonlinear analysis of circular concrete-filled steel tubular (CFST) slender beam-columns with preload effects, in which the initial geometric imperfections, deflections caused by preloads, concrete confinement and second order effects are incorporated. Computational algorithms are developed to solve the nonlinear equilibrium equations. Comparative studies are undertaken to validate the accuracy of computational algorithms developed. Also included is a parametric study for examining the effects of the preloads, column slenderness, diameter-to-thickness ratio, loading eccentricity, steel yield stress and concrete confinement on the behavior of circular CFST slender beam-columns under eccentric loadings. The numerical model is demonstrated to be capable of predicting accurately the behavior of circular CFST slender beam-columns with preloads. The preloads on the steel tubes can affect significantly the behavior of CFST slender beam-columns and must be taken into account in the design.
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10

Stempin, Paulina, and Wojciech Sumelka. "Dynamics of Space-Fractional Euler–Bernoulli and Timoshenko Beams." Materials 14, no. 8 (April 7, 2021): 1817. http://dx.doi.org/10.3390/ma14081817.

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This paper investigates the dynamics of the beam-like structures whose response manifests a strong scale effect. The space-Fractional Euler–Bernoulli beam (s-FEBB) and space-Fractional Timoshenko beam (s-FTB) models, which are suitable for small-scale slender beams and small-scale thick beams, respectively, have been extended to a dynamic case. The study provides appropriate governing equations, numerical approximation, detailed analysis of free vibration, and experimental validation. The parametric study presents the influence of non-locality parameters on the frequencies and shape of modes delivering a depth insight into a dynamic response of small scale beams. The comparison of the s-FEBB and s-FTB models determines the applicability limit of s-FEBB and indicates that the model (also the classical one) without shear effect and rotational inertia can only be applied to beams significantly slender than in a static case. Furthermore, the validation has confirmed that the fractional beam model exhibits very good agreement with the experimental results existing in the literature—for both the static and the dynamic cases. Moreover, it has been proven that for fractional beams it is possible to establish constant parameters of non-locality related to the material and its microstructure, independent of beam geometry, the boundary conditions, and the type of analysis (with or without inertial forces).
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Дисертації з теми "Slender beam"

1

Chung, Kwok Fai. "The elastic distortional and local plate buckling of slender web beam." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/7860.

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2

Perea, Tiziano. "Analytical and experimental study on slender concrete-filled steel tube columns and beam-columns." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37303.

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The use of composite steel-concrete columns and beam-columns in many structural systems is increasing globally due to the intrinsic synergy when these materials are designed and detailed together properly. However, limited test data are available to justify the structural system response factors and comprehensive design equations in current design specifications. This research, through the testing of 18 full-scale, slender concrete-filled steel tube (CFT) beam-columns, attempts to address the latter need. The circular and rectangular CFT specimens tested for this research are by far the longest and the most slender full-scale CFT members tested worldwide. These CFT specimens were subjected to a complex load protocol that includes pure compression, uniaxial and biaxial bending combined with compression, pure torsion, and torsion combined with compression. In addition, data from the hydrostatic pressure on the steel tubes due to the fresh concrete at casting was evaluated. The single most important contribution of this research is the clarification of the interaction between strength and stability in slender composite concrete-filled columns and beam-columns. Parallel to the experimental study, advanced computational analyses were carried out to calibrate material and element models that characterize the salient features of the observed CFT response, such as steel local buckling and residual stresses, concrete confinement, stability effects, strength, and stiffness degradation, among others. Based on the observed behavior, simplified guidelines for the computation of the strength and stiffness parameters for CFT columns and beam-columns are proposed for design purposes.
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3

Pettersson, Frida. "A Study on the Behavior of Deep, Slender Wide Flange Steel Beam-Column Members in Seismic Applications." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209092.

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4

Chemrouk, Mohamed. "Slender concrete deep beams : behaviour, serviceability and strength." Thesis, University of Newcastle upon Tyne, 1988. http://hdl.handle.net/10443/3103.

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Reinforced concrete deep beams have useful applications in construction. However, their design is not yet covered by the British Standard BS 8110: 1985 which explicitly states that "for the design of deep beams, reference should be made to specialist literature". A selection of literature on deep beams is considered. First, the major works that have led to design recommendations are reviewed. Then, the current major codes and manuals covering deep beams, namely the CIRIA Guide, the European CEB-FIP model code, the American ACI(318-83) (revised 1986) code and the Canadian CAN3-A22.3-MB4 code are outlined; worked examples are given in order to illustrate their practical applications and compare their different approaches to deep beam design. The purpose of this literature review was to define the deep beam problem and identify the major questions still remaining unanswered together with the limitations of the present design documents on the subject. The nature of diagonal cracking in slender deep beams has recently raised a question as to the application of the shear-strength equation in cl.3.4.2 of the CIRIA Deep Beam Guide. The effectiveness of web reinforcement on serviceability and strength of deep beams in general is also an area where strong disagreement exists. A testing programme, consisting of 15 beams of height/thickness ratios ranging from 20 to 50 and grouped in 3 different series, was performed to provide information on these two areas. The main variables were the height/thickness ratio and the quantity and arrangement of web steel. The beams were tested under concentrically applied two point-loads. Based on the test results and observations, modifications are given for the CIRIA equation and other formulae derived from stocky deep beam tests to be used in slender ones for analysis and design purposes. A new formula is also proposed for the prediction of the ultimate shear capacity. The stability of deep beams is another area which has received less attention in the past by researchers and designers who often avoided the problem by opting for stocky sections. To quote from the CIRIA Guide "as a possible criterion of failure, buckling can not be disregarded". However, information on such topic is very scarce in the literature. Currently, the only documents that provide design guidelines for buckling are the CIRIA Guide and the Portland Cement Association Design Aid, both of which are based on theoretical studies and engineering judgement. An experimental testing programme, consisting of 7 large scale beam-panels with height/thickness ratios in the range of 20 to 70 and a constant span/depth ratio of 1.0, provided buckling data against which the reliability of the two design documents was assessed. These tests confirmed that both documents offer a safe buckling design with the CIRIA Guide being too conservative. Although deep beams are frequently continuous over several spans, very little published data exist for such beams. For this purpose, 12 two-span continuous concrete deep beams with span/depth ratios less than 1.0 and having different quantities and arrangements of web reinforcement were tested under two point-loads. The specimens were heavily instrumented to obtain as much information as possible about the behaviour of the beams at each stage of loading. Applied loads and reactions were among the measurements made and enabled the actual bending moment distribution to be determined and compared to that of corresponding continuous shallow beams. Based on the test results and observations and in the light of other published work, recommendations are given for the bearing, shear and flexural design of continuous deep beams.
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5

Pandey, Anupam. "Bending, Creasing, and Snapping of Soft, Slender Structures." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49689.

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Crosslinked polymers or elastomers are examples of soft, synthetic material that can bend, crease, snap, wrinkle in response to external stimulus like pH, humidity, electric field or swelling. If a droplet of favorable solvent is placed on top of a thin, elastomer beam, it bends drastically to accommodate the excessive swelling stress. Keeping the solvent and its volume constant if we just increase the thickness of the beam, microscopic surface creases appear on the top surface. In this thesis, we experimentally characterize this transition between global bending to surface creasing. Closing of Venus flytrap leaves is a classic example of well known snap-through instability. A knowledge of the timescale of snapping is crucial in designing advanced functional materials. We perform the simplest experiment of poking an soft, elastomer arch at its apex till it snaps. Combining our experiments with analytical model we are able to predict the purely geometric nature of the snapping timescale. We also develop a simple scaling law that captures the dynamics of jumping toy poppers.
Master of Science
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6

Wong, Ha Hang Aaron. "Buckling and stability of slender reinforced concrete deep beams." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279763.

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7

Folz, Bryan. "Numerical simulation of the non-linear transient response of slender beams." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26287.

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A simple numerical solution strategy for predicting the transient response of slender ductile beams, exhibiting geometric and/or material non-linear behaviour, is presented in this study. In the theoretical development of the problem the governing non-linear equation of motion, in variational form, for the bending and stretching of a Bernoulli-Euler beam is established. The numerical solution procedure is then initiated by employing the assumed displacement version of the Finite Element Method with 1-dimensional 6-DOF beam elements. Elastic-plastic strain-hardening of the beam material is conveniently accounted for by means of the "mechanical sublayer model". Visco-plastic material behaviour is included in the analysis through a simple strain-rate dependent constitutive relationship. The equations of motion for the spatially discretized beam are integrated time-wise by means of the central difference method. A variety of examples are then solved and the results compared with solutions from other sources. In general, the numerical solution strategy yields an efficient and accurate modelling of the non-linear transient response of slender ductile beams.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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8

Couto, Carlos André Soares. "Fire design of steel members with class 4 cross-section." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/17375.

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Doutoramento em Engenharia Civil
A presente tese resulta de um trabalho de investigação com o propósito de aumentar o conhecimento do comportamento ao fogo de elementos metálicos com secção transversal de Classe 4, ou seja, suscetíveis à ocorrência de fenómenos de encurvadura local. Os elementos metálicos com secção transversal de Classe 4 são amplamente utilizados na construção metálica por serem soluções bastante atrativas em termos de eficiência e economia de material. No entanto, a verificação da resistência ao fogo destes elementos carece de fórmulas simplificadas que se adequem à mais-valia proporcionada por este tipo de solução. O principal objetivo desta dissertação foca-se no desenvolvimento de metodologias de cálculo para verificação da resistência ao fogo de elementos metálicos com secção transversal de Classe 4 com base em estudos numéricos realizados com elementos finitos de casca recorrendo ao programa SAFIR através de análises material e geometricamente não lineares (GMNIA - geometrically and material non-linear analysis with imperfections). É demonstrado nesta tese que, as fórmulas atualmente propostas no Eurocódigo 3 para verificação da resistência ao fogo de elementos de Classe 4 em situação de incêndio podem ser melhoradas. No que diz respeito à capacidade resistente da secção transversal, a metodologia atual do Eurocódigo 3 subestima a resistência das secções quando constituídas simultaneamente por placas de Classe 4 e de outras classes. Por outro lado, mostra-se que os fenómenos de encurvadura local afetam também as secções de Classe 3 a altas temperaturas. Neste trabalho, ambas as classes foram tratadas como secções transversais esbeltas, tendo sido propostas novas fórmulas para o seu cálculo em situação de incêndio. No caso de vigas com secção transversal esbelta, observa-se que as formulações preconizadas no Eurocódigo 3 são também inadequadas. A proposta para o cálculo da resistência da secção transversal desenvolvida neste trabalho conduz a melhorias na verificação da segurança ao fogo destes elementos mas, não obstante, propõe-se novas expressões que consideram a interação entre a encurvadura local e o fenómeno de encurvadura lateral que ocorre nestas vigas. Assim desenvolveu-se um parâmetro de secção efetiva cuja utilização permite uma verificação ao fogo da encurvadura lateral mais eficiente. Por fim, estudam-se as vigas-coluna com secção transversal esbelta, concluindo-se que as fórmulas de interação do Eurocódigo 3 conduzem simultaneamente a resultados muito conservativos ou fora da segurança. Observou-se que este comportamento se deve essencialmente ao cálculo dos fatores de redução para o comportamento de coluna e viga, mas por outro lado, houve a necessidade de alterar os fatores de interação das curvas para que a verificação da resistência ao fogo destes elementos fosse mais segura.
This thesis is the result of a research work with the purpose of increasing the knowledge on the fire behaviour of steel members with Class 4 cross-section, that is, prone to the occurrence of local buckling phenomena. Steel members with Class 4 cross-section due to their advantages regarding their lightness and efficiency are widely used in steel constructions. However, the verification of the fire resistance of these elements lacks simplified formulas that are in agreement with the added value provided by this type of solutions. The main objective of this thesis aims to develop improved structural fire design rules for the stability check of steel members with Class 4 cross-section based on numerical investigation with shell finite elements carried out with the software SAFIR by performing geometrically and material non-linear analysis with imperfections (GMNIA). It is demonstrated in this work that, the existing design rules preconized proposed in Eurocode 3 for the design of steel members with Class 4 crosssection in case of fire could be improved. In what concerns the cross-sectional capacity, the present methodology of Eurocode 3 underestimates the resistance of the sections when they are built up simultaneous of Class 4 plates and plates of other classes. Moreover, it is demonstrated that local buckling affects also Class 3 cross-sections in case of fire. Thus, in this work, both classes are treated as slender cross-sections and proposals are made for new rules to calculate their capacity in fire situation. For beams with slender cross-sections, it is concluded that the formulae available in Eurocode 3 are also inadequate. The new proposal for the crosssectional resistance calculation leads to improvements in terms of the fire design of these members but, nonetheless, new expressions are proposed that account for the interaction between local buckling and lateral-torsional buckling that occurs in these beams. Accordingly, the effective section factor was developed allowing a better design against lateral-torsional buckling of on beams with slender cross-sections in case of fire. Finally, beam-columns with slender cross-sections are studied, and it is concluded that the present interaction formulae provided by Eurocode 3 leads simultaneous to very conservative or unsafe results. It was observed that this was mainly due to the calculation of the reduction factors for the beam and column behaviour, but besides that, there was the need to change the interaction factors so that the design rules to assess the mechanical resistance of beam-columns in case of fire be safer.
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9

Hall, Eric K. "A study of slender beams: finite deformations, chaotic vibrations, and active control." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/12919.

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10

Zhao, H., R. Wang, Dennis Lam, C.-C. Hou, and R. Zhang. "Behaviours of circular CFDST with stainless steel external tube: Slender columns and beams." Elsevier, 2020. http://hdl.handle.net/10454/18141.

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Анотація:
No
In this work, experimental and numerical investigations were performed on the behaviours of circular concrete filled double steel tubular (CFDST) slender columns and beams, in which the external tube employed stainless steel tube. Eighteen specimens, 12 slender columns and 6 beams, were tested to obtain the failure patterns, load versus deflection relationships and strain developments of stainless steel tube. A finite element (FE) model was developed and verified by experimental results. The validated FE model was then employed to investigate the effects of key parameters, including hollow ratio, eccentric ratio and material strength, on the load-carrying capacity. The load distribution among the components and contact stress between steel tube and sandwiched concrete were also analyzed. Finally, the design methods for CFDST, hollow CFST and solid CFST members with carbon steel external tube respectively suggested by Han et al. (2018), Chinese GB 50936-2014 (2014) and AISC 360-16 (2016) were employed to evaluate their applicability for the circular CFDST slender columns and beams with stainless steel outer tube.
The authors gratefully acknowledge the Shanxi Province Outstanding Youth Fund (No. 201701D211006) and the National Natural Science Foundation (No. 51838008).
The full-text of this article will be released for public view at the end of the publisher embargo on 9th Nov 2021.
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Книги з теми "Slender beam"

1

Tran, Fleischer Van, and Hugh L. Dryden Flight Research Center, eds. Extension of Ko straight-beam displacement theory to deformed shape predictions of slender curved structures. Edwards, CA: National Aeronautics and Space Administration, Dryden Flight Research Center, 2011.

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2

Reinforced concrete beams, columns and frames: Section and slender member analysis. London: ISTE, 2013.

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Casandjian, Charles, Jostein Hellesland, Noël Challamel, and Christophe Lanos. Reinforced Concrete Beams, Columns and Frames: Section and Slender Member Analysis. Wiley & Sons, Incorporated, John, 2013.

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Casandjian, Charles, Jostein Hellesland, Noël Challamel, and Christophe Lanos. Reinforced Concrete Beams, Columns and Frames: Section and Slender Member Analysis. Wiley & Sons, Incorporated, John, 2013.

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Casandjian, Charles, Jostein Hellesland, Noël Challamel, Christophe Lanos, and Noël Challamel. Reinforced Concrete Beams, Columns and Frames: Section and Slender Member Analysis. Wiley & Sons, Incorporated, John, 2013.

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Challamel, No, Charles Casandjian, Jostein Hellesland, and Christophe Lanos. Reinforced Concrete Beams, Columns and Frames: Section and Slender Member Analysis. Wiley & Sons, Incorporated, John, 2013.

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Casandjian, Charles, Jostein Hellesland, Noël Challamel, and Christophe Lanos. Reinforced Concrete Beams, Columns and Frames: Section and Slender Member Analysis. Wiley & Sons, Incorporated, John, 2012.

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Частини книг з теми "Slender beam"

1

Liu, Jian, Serhan Guner, and Boyan Mihaylov. "Towards Mixed-Type Modelling of Structures with Slender and Deep Beam Elements." In High Tech Concrete: Where Technology and Engineering Meet, 1243–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_144.

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Pellicano, F., and A. F. Vakakis. "Normal Modes and Boundary Layers for a Slender Tensioned Beam on a Nonlinear Foundation." In Normal Modes and Localization in Nonlinear Systems, 79–93. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-2452-4_5.

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Cigada, Alfredo, Alessandro Caprioli, and Marcello Vanali. "Experimental investigation of the pre-tension effects on the modal parameters of a slender pre-tensioned concrete beam." In Dynamics of Civil Structures, Volume 4, 125–34. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9831-6_15.

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Eslami, Mohammad Reza, and Yasser Kiani. "Slender Beams, Thermal Buckling." In Encyclopedia of Thermal Stresses, 4427–32. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_514.

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Hellesland, Jostein, Noël Challamel, Charles Casandjian, and Christophe Lanos. "Slender Compression Members - Mechanics and Design." In Reinforced Concrete Beams, Columns and Frames, 103–212. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118635360.ch2.

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Oñate, Eugenio. "Slender Plane Beams. Euler-Bernoulli Theory." In Structural Analysis with the Finite Element Method Linear Statics, 1–36. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-1-4020-8743-1_1.

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Oñate, Eugenio. "Thick/Slender Plane Beams. Timoshenko Theory." In Structural Analysis with the Finite Element Method Linear Statics, 37–97. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-1-4020-8743-1_2.

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Ahmad, Subhan. "Size Effect on Shear Strength of Slender Reinforced Concrete Beams." In Structural Integrity, 494–502. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98335-2_33.

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Spuldaro, Everton, Luiz Fabiano Damy, and Domingos A. Rade. "Influence of Temperature Randomness on Vibration and Buckling of Slender Beams." In Lecture Notes in Mechanical Engineering, 347–60. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53669-5_25.

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Piana, G., A. Manuello, R. Malvano, and A. Carpinteri. "Fundamental Frequencies of Slender Beams Subject to Imposed Axial End Displacements." In Experimental and Applied Mechanics, Volume 6, 59–66. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06989-0_8.

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Тези доповідей конференцій з теми "Slender beam"

1

Hu, Shengrong, and Yinggang Ou. "Notes on MacNeal slender beam." In 2011 Second International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2011. http://dx.doi.org/10.1109/mace.2011.5988155.

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Barbulescu, Horatiu, Dan B. Marghitu, and Uday Vaidya. "Spatial Impact of a Slender Beam." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33577.

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In this paper, the dynamics of the spatial impact of a slender beam is analyzed. The equations of motion are calculated using Kane’s impact method. The generalized momentum and generalized impulse of the beam are considered to find the equations of motion of the beam. The frictional phenomenon at the contact point is analyzed. For the case of impact without slipping, it is used the assumption that the tangential component of the velocity of separation is null. In the case with slipping, the tangential impulse (at the plane of impact) is computed. The sliding direction after impact is calculated. A simulation of the impact of beam with a surface is developed and the velocity of separation, force of impact and kinetic energy of the beam after impact are studied for different incident angles of the beam. The incident angle is varied from 0° to 57°. The results are function of the incident angle of impact. The results can be used to calculate the coefficient of restitution and friction for composite materials.
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"Alternative design for the non-slender beam (deep beam)." In SP-208: Examples for the Design of Structural Concrete with Strut-and-Tie Models. American Concrete Institute, 2002. http://dx.doi.org/10.14359/12413.

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"SHS and RHS stainless steel slender beam-columns." In Engineering Mechanics 2018. Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018. http://dx.doi.org/10.21495/91-8-957.

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Danzi, Francesco, Giacomo Frulla, Enrico Cestino, and James M. Gibert. "MDO/MSO of Slender Thin Walled Box Beam Model." In 18th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-4323.

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Na´prstek, Jirˇi´. "Domains and Types of Aeroelastic Instability of Slender Beam." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34132.

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Slender structures exposed to a cross air flow are prone to vibrations of several types resulting from aeroelastic interaction of a flowing medium and a moving structure. Aeroelastic forces are the origin of nonconservative and gyroscopic forces influencing the stability of a system response. Conditions of a dynamic stability loss and a detailed analysis of a stability domain has been done using a linear mathematical model. Response properties of a system located on a stability boundary together with tendencies in its neighborhood are presented and interpreted from physical point of view. Results can be used for an explanation of several effects observed experimentally but remaining without theoretical explanation until now.
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Wang, Shenghai, Aldo Ferri, William Singhose, and Yujia Yang. "Control of Slender-Beam Payloads During Lift-Up Operations." In ASME 2018 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dscc2018-8967.

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When lifting up a long slender beam from ground, the payload may slip or move suddenly in unintended and unpredictable ways. This occurs during crane operations when the movements of the overhead trolley and the hoist cable are not properly coordinated. Also, it is difficult to keep the centers of hook and payload mass aligned with the pivot point when the payload is lifted off the ground, resulting in undesired hook and payload swing. The payload’s unintended sliding or swing can potentially cause damage and reduce efficiency. This paper divides the lift-up process into two phases including a constrained phase and a free hanging phase, develops a combination of PID controller and speed envelope to prevent slip in the constrained phase, and presents an observer-based Linear Quadratic Regulator (LQR) control strategy to stabilize the double-pendulum oscillations in the free hanging phase. The robustness of the proposed observer-based LQR was analyzed. Lift-up experiments were carried out to verify the controller development.
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Sarker, Pratik, and Uttam K. Chakravarty. "Numerical Analysis of the Vibration of Slender Beams." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-95186.

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Abstract The use of rotating beam-like structures is very common in engineering systems including power generation machines, automotive systems, aircraft structures, energy harvesting systems, and many more. The dynamic response analysis of these systems is of utmost importance for proper prediction of their performance and life. Among different outcomes of the dynamic response analysis, one of the major parameters is the frequency of the free vibration. Because of realistic loads and couplings between different degrees-of-freedom of motion, for majority of the cases, there is no analytical solution available. Hence, the governing equations need to be solved numerically. There are several numerical approaches available to solve for the coupled frequency of free vibration of rotating beams. In this paper, an overview of the different numerical methods is presented for coupled, free vibration analysis of slender, rotating beam-like structures. Three different degrees-of-freedom including out-of-plane bending, in-plane bending, and torsional deformations are considered for the most general case. At first, the eigen value problem of the coupled, mathematical model of free vibration of the beam is presented analytically. Following that, the use of different numerical methods is presented with relevant examples and corresponding beam parameters. Finally, the implementation of the finite difference method is presented to compare the corresponding results with that obtained by other methods.
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Soni, Prashant K., Carl M. Larsen, and Jie Wu. "Hydrodynamic Coefficients for Vortex Induced Vibrations of Slender Beams." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79797.

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Empirical codes for prediction of vortex induced vibrations need reliable data for hydrodynamic coefficients. Such data are almost exclusively based on measured forces on rigid cylinders that have forced harmonic motions in cross-flow (CF) or in-line (IL) directions. This type of experiment is not able to capture all effects that could be important for realistic cross section motions of slender beams due to two reasons: 1. Slender beams will normally have combined IL and CF oscillations. 2. Higher order frequency components will normally be present for vibrating beams. It is difficult to measure local forces on short segments of flexible beams in laboratory tests due to the small diameters. The most convenient instrumentation is to use a large number of strain gauges or accelerometers along the beam. Proper data processing will then give reliable data for the motions, which means that the trajectory of cross sections can be found. Hence, the following set of experiments can be carried out in order to find hydrodynamic coefficients under realistic VIV conditions: 1. Experiments with a slender flexible beam and processing of recorded strains or accelerometers to identify cross section trajectories. 2. Measurement of forces on a rigid cylinder section with forced motions. Reynolds number, amplitude ratio, orbit shape and non-dimensional frequency must be identical in the flexible beam and rigid cylinder tests. Such experiments have been carried out, and the results are presented in terms of hydrodynamic coefficients for combined CF and IL oscillations. Coefficients are found for the primary CF and IL frequencies, but also for higher order frequency components. Results are presented and discussed in relation to well known results from pure CF and IL oscillations. One way of verifying that the coefficients have been correctly identified, is to apply the coefficients in an empirical response model and compare analysis results to the observation. This step has, however, not been carried out so far.
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Jorabchi, Kavous, Joshua Danczyk, and Krishnan Suresh. "Shape Optimization of Potentially Slender Structures." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-50001.

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Shape optimization lies at the heart of modern engineering design. Through shape optimization, computers can, in theory, ‘synthesize’ engineering artifacts in a fully automated fashion. However, a serious limitation today is that the evolving geometry (during optimization) may become slender, i.e., beam or plate-like. Under such circumstances, modern 3-D computational methods, such as finite element analysis (FEA), will fail miserably, and so will the shape optimization process. Indeed, the recommended method for analyzing slender artifacts is to replace them with 1-D beams/ 2-D plates, prior to discretization and computational analysis, a process referred to as geometric dimensional reduction. Unfortunately explicit geometric reduction is impractical and hard to automate during optimization since one cannot predict a priori when an artifact will become slender. In this paper, we develop an implicit dimensional reduction method where the reduction is achieved through an algebraic process. The proposed method of reduction is computationally equivalent to explicit geometric reduction for comparable computational cost. However, the proposed method can be easily automated and integrated within a shape optimization process, and standard off-the-shelf 3-D finite element packages can be used to implement the proposed methodology.
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Звіти організацій з теми "Slender beam"

1

Chansuk, Piyachai, Gulen Ozkula, Chia-Ming Uang, and John L. Harris III. Seismic Behavior and Design of Deep, Slender Wide-Flange Structural Steel Beam-Columns. National Institute of Standards and Technology, July 2021. http://dx.doi.org/10.6028/nist.tn.2169.

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Lucier, Gregory, Catrina Walter, Sami Rizkalla, Paul Zia, and Gary Klein. Development of a Rational Design Methodology for Precast Slender Spandrel Beams. Precast/Prestressed Concrete Institute, 2010. http://dx.doi.org/10.15554/pci.rr.comp-009.

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Research plan for the study of seismic behavior and design of deep, slender wide flange structural steel beam-column members. Gaithersburg, MD: National Institute of Standards and Technology, December 2011. http://dx.doi.org/10.6028/nist.gcr.11-917-13.

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