Steady and transient state tests on local buckling of high strength Q690 steel stub columns

Engineers are increasingly encouraged to consider sustainability in the design and construction of new civil engineering infrastructure. Sustainability can be achieved through the use of high strength materials thereby reducing quantity of materials required in construction where possible. Knowledge of residual stresses in fabricated columns is important in identifying whether the fabricated columns can be classified as heavily welded (HW) or lightly welded (LW). The determination of residual stresses can be used to determine the local buckling of stub columns. Residual stress magnitudes are also essential in the numerical modelling of buckling behaviour of columns. This paper outlines the challenges in measurement of residual stresses using neutron diffraction in fabricated high strength steel square tubes. The residual stress line scans and maps were measured using the Kowari Strain Scanner located at the Australian Nuclear and Science Organisation (ANSTO) in Australia.

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Eccentric compression tests and design of welded steel tube strengthened RC stub columns with high-strength grout

Journal of Building Engineering ◽

10.1016/j.jobe.2020.102072 ◽

2021 ◽

Vol 35 ◽

pp. 102072

Author(s):

Benhao Gao ◽

Jingfeng Wang ◽

Qihan Shen ◽

Chenggang Wang ◽

Zhonghua Yu

Keyword(s):

High Strength ◽

Steel Tube ◽

Compression Tests ◽

Welded Steel ◽

Eccentric Compression ◽

Stub Columns

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Study on the Local Buckling Behavior of Steel Equal Angle Members under Axial Compression with the Steel Strength Variation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.2430 ◽

2011 ◽

Vol 374-377 ◽

pp. 2430-2436

Author(s):

Gang Shi ◽

Zhao Liu ◽

Yong Zhang ◽

Yong Jiu Shi ◽

Yuan Qing Wang

Keyword(s):

Finite Element ◽

Axial Compression ◽

High Strength Steel ◽

Local Buckling ◽

Steel Structures ◽

High Strength ◽

Element Analysis ◽

Equal Angle ◽

Buckling Behavior ◽

Steel Strength

High strength steel sections have been increasingly used in buildings and bridges, and steel angles have also been widely used in many steel structures, especially in transmission towers and long span trusses. However, high strength steel exhibits mechanical properties that are quite different from ordinary strength steel, and hence, the local buckling behavior of steel equal angle members under axial compression varies with the steel strength. However, there is a lack of research on the relationship of the local buckling behavior of steel equal angle members under axial compression with the steel strength. A finite element model is developed in this paper to analyze the local buckling behavior of steel equal angle members under axial compression, and study its relationship with the steel strength and the width-to-thickness ratio of the angle leg. The finite element analysis (FEA) results are compared with the corresponding design method in the American code AISC 360-05, which provides a reference for the related design.

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Compression Test on Cold-Formed Steel Built-Up Back-to-Back Channels Stub Columns

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.201-203.2900 ◽

2011 ◽

Vol 201-203 ◽

pp. 2900-2903 ◽

Cited By ~ 5

Author(s):

Chui Huon Tina Ting ◽

Hieng Ho Lau

Keyword(s):

Compression Test ◽

Failure Modes ◽

Local Buckling ◽

Effective Width ◽

Test Results ◽

Direct Strength Method ◽

Cold Formed Steel ◽

Stub Column ◽

Hot Rolled ◽

Stub Columns

Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been substantially taken from research in hot-rolled built-up members connected with bolts or welds [1]. The aim of this paper is to investigate on built-up back-to-back channels stub columns experimentally and theoretically using Effective Width Method and Direct Strength Method. Compression test was performed on 5 lipped channel and 5 back-to-back channels stub columns fabricated from cold-formed steel sheets of 1.2mm thicknesses. The test results indicated that local buckling is the dominant failure modes of stub columns. Therefore, Effective Width Method predicts the capacity of stub columns compared to Direct Strength Method. When compared to the average test results, results based on EWM are 5% higher while results based on DSM are 12% higher for stub column.

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