Ovaling Of Pipelines Under Pure Bending

Jirsa, James O.; Lee, Fook Hoy; Wilhoit, James C.; Merwin, J. E.

doi:10.4043/1569-ms

Cited by 23 publications

(23 citation statements)

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“…For circular sections, a regression analysis of steel CHS stub column data 17,18 led to equation (7). The CHS stub column data and regression curve have been plotted in Fig.…”

Section: Relationship Between Deformation Capacity å Lb and Slendernessmentioning

confidence: 99%

“…These results were collated from a series of three-and four-point bending tests. [7][8][9][10][11][12] In Fig. 4, the maximum bending moment from the beam tests M u has been normalised by the elastic moment M el (determined as the elastic modulus W el multiplied by the material yield strength f y ) and plotted against the cross-section slenderness º c , defined by equation (2).…”

Section: Cross-section Classificationmentioning

confidence: 99%

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The continuous strength method

Gardner

2008

Proceedings of the Institution of Civil Engineers - Structures

174

148

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Many of the principal concepts that underpin current metallic structural design codes were developed on the basis of bilinear (elastic, perfectly-plastic) material behaviour; such material behaviour lends itself to the concept of section classification. The continuous strength method represents an alternative treatment to crosssection classification, which is based on a continuous relationship between slenderness and (inelastic) local buckling and a rational exploitation of strain hardening. The development and application of the continuous strength method to structural steel design is described herein. Materials that exhibit a high degree of nonlinearity and strain hardening, such as aluminium, stainless steel and some high-strength steels, fit less appropriately into the framework of cross-section classification, and generally benefit to a greater extent from the continuous strength method. The method provides better agreement with test results in comparison to existing design codes, and offers increases in member resistance and a reduction in scatter of the prediction. An additional benefit of the proposed approach is that cross-section deformation capacity is explicitly determined in the calculations, thus enabling a more sophisticated and informed assessment of ductility supply and demand. Further developments to the method are under way.

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“…For circular sections, a regression analysis of steel CHS stub column data 17,18 led to equation (7). The CHS stub column data and regression curve have been plotted in Fig.…”

Section: Relationship Between Deformation Capacity å Lb and Slendernessmentioning

confidence: 99%

Section: Cross-section Classificationmentioning

confidence: 99%

The continuous strength method

Gardner

2008

Proceedings of the Institution of Civil Engineers - Structures

174

148

View full text Add to dashboard Cite

show abstract

“…For example, the elastic instability analysis performed by Seide and Weingarten [4], Fabian [5], and Long-Yuan Li [6], and also the instability analysis at elastoplastic state conducted by Jirsa et al [7], Sherman [8], Reddy [9], Gellin [10], Bushnell [11], Calladine [12] and Kyriakides and Shaw [13] experimentally or analytically.…”

Section: Introductionmentioning

confidence: 99%

On the evaluation of plastic buckling of pipeline bending

Zheng

Teng

et al. 2017

IRASE

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In the present paper, various formulae for evaluating critical buckling strain of bending pipeline are analyzed on basis of its actual nature, available test data or fi nite element calculation results. The available test data is from different resources, it provides a more objective comparison; Especially, the experimental bending buckling data of Corona et al. and Kyriakides et al. for Al-6061-T6 aluminum pipes with various D/t value, as well as the prediction of Minnaar's FEM regressive formula for high grade steel pipe are reanalyzed to check the reasonability of the plastically elliptical cross-section model. It shows that the consequence of the plastically elliptical cross-section model is more reasonable than others for the critical buckling strain prediction of a pipe bending in most cases.

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“…For circular sections, a regression analysis of steel CHS stub column data 17,18 led to equation (7). The CHS stub column data and regression curve have been plotted in Figure 6, together with the elastic critical buckling curve.…”

Section: Relationship Between Deformation Capacity  Lb and Slendernessmentioning

confidence: 99%

“…Figure 4 shows the results of bending tests on structural steel circular hollow sections. These results were collated from a series of three and four point bending tests 7,8,9,10,11,12 . In Figure 4, the maximum bending moment from the beam tests M u has been normalised by the elastic moment M el (determined as the elastic modulus W el multiplied by the material yield strength f y ) and plotted against the crosssection slenderness c  , defined by equation (2).…”

Section: Cross-section Classificationmentioning

confidence: 99%

The continuous strength method for steel and composite design

Gardner¹,

Macorini²,

Kucukler³

2013

Proceedings of the Institution of Civil Engineers - Structures

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Many of the principal concepts that underpin current metallic structural design codes were developed on the basis of bi-linear (elastic, perfectly-plastic) material behaviour; such material behaviour lends itself to the concept of section classification. Resistance based on the assignment of cross-sections into this discrete classification system is a useful, but artificial, simplification. The resistance of structural cross-sections is, in reality, a continuous function of the slenderness of the constituent plate elements. Although not explicitly included in the determination of resistance, strain hardening is an essential component of the section classification system, and is required, for example, to enable the attainment of the plastic moment at finite strains. The Continuous Strength Method represents an alternative treatment to cross-section classification, which is based on a continuous relationship between slenderness and (inelastic) local buckling and a rational exploitation of strain hardening.The development and application of the Continuous Strength Method to structural steel design is described herein. Materials that exhibit a high degree of non-linearity and strain hardening, such as aluminium, stainless steel and some high-strength steels, fit less appropriately into the framework of cross-section classification, and generally benefit to a greater extent from the Continuous Strength Method. The method provides better agreement with test results in comparison to existing design codes, and offers increases in member resistance and a reduction in scatter of the prediction. An additional benefit of the proposed approach is that cross-section deformation capacity is explicitly determined in the calculations, thus enabling a more sophisticated and informed assessment of ductility supply and demand. Further developments to the method are underway.

show abstract

Ovaling Of Pipelines Under Pure Bending

Cited by 23 publications

References 0 publications

The continuous strength method

The continuous strength method

On the evaluation of plastic buckling of pipeline bending

The continuous strength method for steel and composite design

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