Advanced analysis of arbitrarily shaped axially loaded beams including axial warping and distortion

Argyridi, Amalia; Sapountzakis, E. J.

doi:10.1016/j.tws.2018.08.019

Cited by 19 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, although the cross-section can be thin-or thick-walled and assumptions of thin walled beam theory are not adopted in [72], axial modes are calculated through the solution of an eigenvalue problem. Finally, Argyridi and Sapountzakis [81] developed a higher order beam theory for generally loaded beams of arbitrary cross-section where axial warping and distortional modes are evaluated employing the concept of sequential equilibrium scheme. In order to exemplify the axial warping and distortional modes of [81] and taking into account that in [81] these modes of a hollow rectangular cross section (closed crosssection) are illustrated, in table 1 warping and distortional modes of W250x45 cross-section (open cross-section) are presented according to the sequential equilibrium scheme [81].…”

Section: Higher Order Beam Theories Considering Warping and Distortionmentioning

confidence: 99%

“…Finally, Argyridi and Sapountzakis [81] developed a higher order beam theory for generally loaded beams of arbitrary cross-section where axial warping and distortional modes are evaluated employing the concept of sequential equilibrium scheme. In order to exemplify the axial warping and distortional modes of [81] and taking into account that in [81] these modes of a hollow rectangular cross section (closed crosssection) are illustrated, in table 1 warping and distortional modes of W250x45 cross-section (open cross-section) are presented according to the sequential equilibrium scheme [81]. In contrast, in the numerical example of Section 4, the linear buckling of a hollow rectangular cross section, which hasn't been examined in [82], is examined as a comparison with literature.…”

Section: Higher Order Beam Theories Considering Warping and Distortionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of in-Plane Deformation in Higher Order Beam Theories

Sapountzakis

Argyridi

2018

Strojnícky Časopis - Journal of Mechanical Engineering

View full text Add to dashboard Cite

Comparing Euler-Bernoulli or Tismoshenko beam theory to higher order beam theories, an essential difference can be depicted: the additional degrees of freedom accounting for out-of plane (warping) and in-plane (distortional) phenomena leading to the appearance of respective higher order geometric constants. In this paper, after briefly overviewing literature of the major beam theories taking account warping and distortional deformation, the influence of distortion in the response of beams evaluated by higher order beam theories is examined via a numerical example of buckling drawn from the literature.

show abstract

Section: Higher Order Beam Theories Considering Warping and Distortionmentioning

confidence: 99%

Section: Higher Order Beam Theories Considering Warping and Distortionmentioning

confidence: 99%

Influence of in-Plane Deformation in Higher Order Beam Theories

Sapountzakis

Argyridi

2018

Strojnícky Časopis - Journal of Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…Kwan 4 is known as one of the pioneering researchers to carry out numerical studies on the shear‐lag phenomenon introduced in core shear walls. Further details on the shear‐lag contribution on the behavior of nonrectangular cross‐sections can be found in quite a few references 5–14 …”

Section: Introductionmentioning

confidence: 99%

“…Further details on the shear-lag contribution on the behavior of nonrectangular crosssections can be found in quite a few references. [5][6][7][8][9][10][11][12][13][14] A wealth of experimental, [15][16][17][18][19][20][21][22][23] analytical, [24][25][26][27] and numerical [28][29][30][31] studies have also been conducted on FRCSWs which obviously indicates the inevitable effects of the shear-lag on the structural behavior of these walls. In design practice, introducing the shear-lag effects into the performance of nonrectangular sections is possible through proposing either (1) a concentration factor 32,33 or (2) an effective width ratio.…”

mentioning

confidence: 99%

Effective width estimation of flanged reinforced concrete shear walls

Tabiee,

Abdoos,

Khaloo

et al. 2023

Structural Design Tall Build

View full text Add to dashboard Cite

SummaryThe present study deals with introducing a novel approach toward estimating the effective width of flanged reinforced concrete shear walls (FRCSWs). Due to the paucity of studies in assessing the effective width of nonrectangular sections, this paper aims at proposing efficacious formulations for the effective width estimation of short, squat, and slender T‐ and U‐shaped reinforced concrete (RC) shear walls subjected to the simultaneous action of the axial and lateral loading. To this end, at first, FRCSWs are simulated in the flanged shear wall numerical laboratory (FlashLab) program, which utilizes the finite element Abaqus software to analyze the walls. Thereafter, employing the developed numerical models, an extensive parametric investigation is conducted for a wide range of the key parameters. General expressions have then been developed to estimate the effective width of flanged RC shear walls invoking the evolutionary polynomial regression (EPR) analysis in conjunction with the genetic algorithm (GA). To assess the capability of the established equations in predicting the effective width of flanged sections, R‐factors have been calculated for all the cases examined in this study, which ranged between 0.78 and 0.94. Furthermore, a comparison has been made among the results attained through the proposed methodology and those obtained using the conventional design codes. It was revealed that the relative error obtained employing the proposed formulations is less than that of the corresponding values of the design codes by approximately 30% on average. The superiority of the established framework stems from consideration of the following: (1) influential parameters, (2) effective width variations at different performance levels, (3) loading direction, and (4) type of the wall in the effective width calculation process.

show abstract

“…Besides, toward improving conventional beam elements in order to include distortional effects, independent parameters have been taken into account in beam analysis. The isogeometric tools (B-splines and NURBS), either integrated in FEM or in boundary element method (BEM) called analog equation method (AEM), are employed in the contribution for the static and dynamic analysis of straight beams (Argyridi and Sapountzakis, 2019; Dikaros and Sapountzakis, 2017; Tsiptsis and Sapountzakis, 2018) and horizontally curved beams (Tsiptsis and Sapountzakis, 2017a, 2017b) of open or closed cross-sections. Design guidelines for intermediate diaphragms have been applied for box girders and assessed as an indirect way to prevent distortional effects, which specified the maximum spacing of intermediate diaphragms for the case where the distortional effects can be ignored.…”

Section: Introductionmentioning

confidence: 99%

New research for the distortion of steel box girders with inner solid diaphragms

Ren

Wang

et al. 2019

Advances in Structural Engineering

View full text Add to dashboard Cite

Toward estimating accurately the distortional response of box girders, in this article, distortion of steel box girders strengthened with intermediate solid diaphragms under eccentric loads is analyzed by employing the so-called initial parameter method. A new model of high-order statically indeterminate structure was established with three orthogonal redundant forces acting at the junction between the girder and diaphragms. Emphasis is put onto the interaction between the girder and diaphragms, where a hypothetical bi-moment B pi indicating all longitudinal redundant force components for diaphragm was proposed besides the moment Mpi for in-plane shear component. Simplified initial parameter method solutions for distortional angle and distortional warping stresses and displacements were derived based on the in-plane and out-of-plane compatibilities between the girder and diaphragms. Taking box girders with three and five intermediate diaphragms as an example, the proposed initial parameter method solutions have good agreement with the finite element analysis ones. Finally, distortional behavior under moving eccentric loads is investigated, resulting in a bowl-shaped curve for moment Mpi and an approximate trigonometric function for bi-moment Bpi. Results show that diaphragms have a stronger resistance on in-plane distortional shear for the loads in midspan than on ends. Plus, the thick diaphragm holds a stronger restraint on distortional warping deformations and stresses than the thin one.

show abstract

Advanced analysis of arbitrarily shaped axially loaded beams including axial warping and distortion

Cited by 19 publications

References 24 publications

Influence of in-Plane Deformation in Higher Order Beam Theories

Influence of in-Plane Deformation in Higher Order Beam Theories

Effective width estimation of flanged reinforced concrete shear walls

New research for the distortion of steel box girders with inner solid diaphragms

Contact Info

Product

Resources

About