Design Strength of Locally Buckling Stub-Lipped Channel Columns

Kumar, Manish; Kalyanaraman, V.

doi:10.1061/(asce)st.1943-541x.0000575

Cited by 31 publications

(7 citation statements)

References 12 publications

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“…As is mentioned before, the local buckling strength curve proposed by Kumar and Kalyanaraman [26] can provide a more accurate estimate than the current direct strength method for columns failed in local buckling. Thus, for the purpose of obtaining a more rational estimate for the cold-formed members…”

Section: Modified Direct Strength Methods For Interactive Failures Invmentioning

confidence: 93%

“…In the following contents, a simplified elastic analysis model was proposed in Section 3.1 for predicting the elastic local, distortional and global buckling load of the built-up I-section columns. Subsequently, three basic strength curves (i.e., local, distortional and global buckling strength curves adopt by AISI [1] and AS/NZS [25] codes) and the modified local buckling strength curve proposed by Kumar and Kalyanaraman [26] were briefly reviewed in section 3.2.1 and 3.2.2, respectively. In addition, the famous LD (P NLD ) and LDG (P NLDE ) interactive strength curves proposed by Schafer [27] were also reviewed in section 3.2.3.…”

Section: Design Methodsmentioning

confidence: 99%

“…Ultimately, based on the research of Kumar and Kalyanaraman [26], novel LD and LDG interactive curves were proposed in section 3.2.4, which aims to explore a more rational strength curve for the cold-formed built-up I-section column failing in LD and LDG interactive mode than the P NLD and P NLDE curves proposed by Schafer [27].…”

Section: Design Methodsmentioning

confidence: 99%

“…In order to verify and validate the proposed method, the test results in this paper as well as other test results in Ref. [18] were compared with the results calculated from the current direct strength method (CDSM) [1,25], the modified direct strength proposed [26] (MDSM) and the proposed method (PDSM) in this paper, respectively. The main conclusion obtained in this paper can be summarized as follows:…”

Section: Conclusion and Remarksmentioning

confidence: 99%

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Experimental investigation and a novel direct strength method for cold-formed built-up I-section columns

Zhou

et al. 2017

Thin-Walled Structures

100

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This paper aims at investigating the structural response and predicting the ultimate strength of the cold-formed built-up I-section columns affected by local, distortional, global and in particular by the local-distortional (LD) interactive and local-distortional-global (LDG) interactive buckling modes. For this purpose, a total of 18 single C-section columns and 18 built-up I-section columns were tested under uniaxial compression load, respectively. The cross-sectional dimension, the thickness and the length of the tested members were varied in the test so as to cover a wide range of local, distortional and overall slenderness. It was shown in the test that noticeable LD interaction was observed for a built-up column with short length as well as LDG interaction for a built-up column with intermediate length. Due to the clear evidence obtained in the test that LD and LDG interactions cause substantial ultimate strength erosion in cold-formed built-up I-section column, a novel direct strength based method was proposed in this paper to quantify such an erosion effect. The validity of the proposed method was then verified by comparing the results obtained from the proposed method with the test results in this paper as well as several other test results in the literature. The comparison results proved that the proposed method can be used successfully in estimating the ultimate strength of cold-formed built-up I-section column affected by pure buckling mode as well as interactive

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Section: Modified Direct Strength Methods For Interactive Failures Invmentioning

confidence: 93%

Section: Design Methodsmentioning

confidence: 99%

Section: Design Methodsmentioning

confidence: 99%

Section: Conclusion and Remarksmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation and a novel direct strength method for cold-formed built-up I-section columns

Zhou

et al. 2017

Thin-Walled Structures

100

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“…6, thus applying uniform distribution of pressure at the top end of the column [29]. The residual stresses are not integrated in the finite element analysis because all the test specimens are fabricated using press-braking process [30]. Cold forming process is not considered in the finite element model because the effect of rounded corners was found to be insignificant [31].…”

Section: Finite Element Modelmentioning

confidence: 99%

Behaviour of Partially Closed Stiffened Cold-Formed Steel Compression Member

Manikandan¹,

Arun²

2016

Arab J Sci Eng

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Usually, thin-walled open column sections have an intrinsic weakness in their low torsional strength, which is unpleasant for resistance of an open section. The distortion behaviour of cold-formed steel open section has a significant role in structural steel design. Hence, initiativeness is made for converting partially closed section by adding simple spacer plates connected with self-tapping screws. The intend of this work is tested to estimate the competence of this solution by comparing the strength and performance of partially closed and open stiffened complex channel section under axial compression. The buckling characteristics of the section are computed using the linear elastic buckling analysis program CUFSM. The resistance and behaviour of the intermediate columns are examined in detail using finite element analysis software ANSYS. A good conformity between finite element analysis and experiments is found. The nominal design capacities are evaluated using the necessities of the direct strength method, North American iron and steel specification and Indian standard and are compared with those from test and finite element analysis. After this verification of the numerical model, a crucial parametric study is carried out to inspect the effect of vitiations on thickness, depth, spacing and slenderness of spacer plates. The particulars of this study and results are offered in this research article.

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