Numerical evaluation of buckling behavior in space structure considering geometrical parameters with joint rigidity

Shon, Sudeok; Hwang, Kyung-Ju; Lee, Seung-Jae

doi:10.1007/s11771-014-2044-y

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…indicates the length of the i th member. If the required slenderness ratio is not be satisfied for compression elements, the allowable stress must not exceed the value of ( 12 2 23 2 ) ever [31]. This example as the complex sizing structural optimization is solved using selected methods and the achieved results are illustrated in Table 5.…”

Section: Sizing Optimization Of a Spatial 582-bar Towermentioning

confidence: 99%

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The Performance Comparison of Three Metaheuristic Algorithms on the Size, Layout and Topology Optimization of Truss Structures

Mortazavi

2019

Mugla Journal of Science and Technology

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The structural optimization problem mostly deals with the weight minimization of the structural system. This issue can be assessed from the size, layout and topology aspects. No matter which aspect(s) is targeted, to solve the problem an optimization technique is required. In the last decades the metaheuristic techniques, as the non-gradient optimization algorithms, are widely applied on solving these classes of problems. In the structural optimization, the most time consuming part of the process is the objective function evaluation. Based on this fact, in the current work, metaheuristic techniques are divided into three main groups as single phase, double phase and multi-phase algorithms. Then based on the author knowledge, three representative methods are picked for each group and their search performance comparatively inspected on solving size, shape and topology optimization of truss structures. To meet this aim, Integrated Particle Swarm Optimization (iPSO), Teaching and Learning Based Optimization (TLBO) and Drosophila Food-Search Optimization (DSO) algorithms are selected, respectively. Different properties like accuracy, convergence rate and complexity of the algorithms are investigated. The outcomes are provided via illustrative diagrams and tables. Based on the achieved results, DSO shows the most complexity level among the other algorithm while the iPSO and TLBO can outperform it on both accuracy and convergence rate. Consequently, iPSO presents a higher accuracy level on finding optimal solutions and TLBO with the lowest standard deviation value through the process shows the highest level of stability on finding optimal solutions.

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Section: Sizing Optimization Of a Spatial 582-bar Towermentioning

confidence: 99%

“…However, the additional criteria (e.g. buckling criterion) on solving this class of problems can rise the complexity level of them [2]. Several investigations made in this field are available in the literature [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The Performance Comparison of Three Metaheuristic Algorithms on the Size, Layout and Topology Optimization of Truss Structures

Mortazavi

2019

Mugla Journal of Science and Technology

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“…Researchers found a significant impact of the joint rigidity on the buckling capacity, and post-buckling behavior including the snap-through existence in the SF domes (López et al 2007;Shon et al 2014). Gidófalvy (2012) concluded that the effect of joint-rigidity on the buckling load of single-layer steel grid shells was significant in large span dome compared to relatively small span.…”

Section: Introductionmentioning

confidence: 99%

Parametric study of the factors affecting the structural performance of braced domes subjected to gravity loads

Al-Huthaifi¹,

Abu‐Farsakh

Tufail³

2022

JER is an international, peer-reviewed journal that publishes f

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Nowadays, single-layer braced domes are widely used by architects and engineers. The strength, economy, and fast installation were the main reasons for spreading this system around the world. The architectural design constraints of a dome impose structural challenges for the design engineer, especially when the span is large, with a small aspect-ratio or heavy design loads. Therefore, the structural engineer looks for different methods to strengthen the single-layer braced dome. This paper studied three different methods for improving the structural performance of the single-layer braced dome, including the grid-density, the member geometry (size), and the bracing systems with double-layer. A total of 96 finite element models were analyzed and designed using SAP2000 commercial software. Four main types of braced domes were studied, including Schwedler, Ribbed, Geodesic, and Kiewit-6. Two different types of joint connections were modeled (i.e., rigidly-connected and pin-connected). In addition, all models were pin-supported at the bottom ring and subjected to static gravity load only.The results indicated that the joint rigidity had a significant impact on the linear buckling load and a minor effect on the maximum displacement and internal forces. Furthermore, it was found that the increase in grid-density, enlarging member size, or using bracing systems significantly improved the structural performance, but at the expense of increasing the of a single-layer brace dome 's weight.

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“…Lopez et al (2007Lopez et al ( , 2011 sets the joints as rigid body, and connects the members with the joints through small-section members to simulate the stiffness of the joints and derive its stiffness matrix. Shon et al (2014) analyzed the performance of the space structure by introducing a stiffness coefficient. Wang et al (2000) derived a calculation formula of the bending stiffness of a round tubular WHS joint through numerical simulation and regression analysis.…”

Section: Introductionmentioning

confidence: 99%

Flexural capacity and bending stiffness of welded hollow spherical joints with H-beams

Yan

Zhang

Chen

et al. 2020

Advances in Structural Engineering

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Eight specimens were designed, and pure bending tests were completed to study the mechanical properties of welded hollow spherical joints (WHS joints) with an H-beam subjected to pure bending. Parametric analyses of the joints under pure bending were conducted in consideration of the diameter(D) and wall thickness (t) of the welded hollow sphere(WHS), and height (h) and width (b) of the H-beam to validate the numerical model. Calculation methods for the flexural capacity and bending stiffness of the H-beam WHS joints were proposed. Results revealed two failure modes of the joints under pure bending, namely, (1) concave at the connection between the WHS and upper flange and external heave at the connection between the WHS and lower flange and (2) small concave at the connection between the WHS and upper flange and tensile fracture of the welding seam at the connection between the WHS and lower flange. The joints demonstrated good ductility under pure bending. The flexural capacity and bending stiffness of the joints were positively related to the wall thickness of the WHS and to the height and width of H-beam but were negatively correlated with the diameter of the WHS. The errors between proposed formulas and FEA for calculating flexural capacity and bending stiffness are very small, indicating the formulas can be employed in structural calculation instead of FEA.

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Numerical evaluation of buckling behavior in space structure considering geometrical parameters with joint rigidity

Cited by 11 publications

References 18 publications

The Performance Comparison of Three Metaheuristic Algorithms on the Size, Layout and Topology Optimization of Truss Structures

The Performance Comparison of Three Metaheuristic Algorithms on the Size, Layout and Topology Optimization of Truss Structures

Parametric study of the factors affecting the structural performance of braced domes subjected to gravity loads

Flexural capacity and bending stiffness of welded hollow spherical joints with H-beams

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