Strength of Thin Steel Compression Flanges

Winter, George

doi:10.1061/taceat.0006092

Cited by 152 publications

(60 citation statements)

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“…In the initial phase, the studies concerned the geometric and mechanical properties of complete shells transformed into the forms of central hyperbolic paraboloid sectors [8]. In order to increase the stiffness and critical loads of the transformed folded shells, two layers of folded sheets arranged in two orthogonal directions were used by the Winter team [9]. There were only created shallow double-layer shells characterized by a small transformation degree.…”

Section: Critical Analysis Of the Present Knowledgementioning

confidence: 99%

Transformed Shell Structures Determined by Regular Networks as a Complex Material for Roofing

Abramczyk¹

2021

Materials

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The article presents a comprehensive extension of the proprietary basic method for shaping innovative systems of corrugated shell roof structures by means of a specific complex material that comprises regular transformable shell units limited by spatial quadrangles. The units are made up of nominally plane folded sheets transformed into shell shapes. The similar shell units are regularly and effectively arranged in the three-dimensional space in an orderly manner with a universal regular reference surface, polyhedral network, and polygonal network. The extended method leads to the increase in the variety of the designed complex shell roof forms and plane-walled elevation forms of buildings. For this purpose, the rules governing the creation of the continuous roof shell structures of many shells arranged in different unconventional visually attractive patterns and their discontinuous regular modifications are sought. To obtain several novel groups of similar unconventional parametric roof forms, single division coefficients and double division coefficients are used. The easy and intuitive modifications of the positions of the vertices belonging to the polygonal network on the side edges of the polyhedral network accomplished by means of a parametric algorithm allow one to adjust the geometry of the complete shell units to the geometric and material constraints related to the orthotropic properties of the transformed sheeting by means of these coefficients. The innovative approach to the shaping of the diverse unconventional roof structures requires the solving of many interdisciplinary problems in the field of mathematics, civil engineering, construction, morphology, architecture, mechanics, computer visualization, and programming.

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Section: Critical Analysis Of the Present Knowledgementioning

confidence: 99%

Transformed Shell Structures Determined by Regular Networks as a Complex Material for Roofing

Abramczyk¹

2021

Materials

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“…The main geometric and mechanical properties of folded sheeting deformed into corrugated hyperbolic paraboloid shells were presented by Nilson [ 7 ]. The Winter’s team [ 8 ] confirmed Nilson’s results and expanded on the scope of the performed tests and analysis. Parker analyzed structures composed of a few quarters of right hyperbolic paraboloids made of two layers of sheets located orthogonally in the same shell.…”

Section: Critical Analysis Of the Present Knowledgementioning

confidence: 88%

Transformed Corrugated Shell Units Used as a Material Determining Unconventional Forms of Complex Building Structures

Abramczyk

2021

Materials

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This article is an insight into interdisciplinary topics in the field of civil engineering, morphology, architecture, mechanics, and computer programming. A novel method for shaping unconventional complex roofs in which regular folded units transformed into various shells are used as a complex substitute material is proposed. The original method’s algorithm for building systems of planes defining diversified polyhedral networks in the three-dimensional space by means of division coefficients of the subsequently determined vertices is presented. The algorithm is based on the proportions between the lengths of the edges of the reference network, the location and shape of the ruled shell units included in the designed complex roof structure, so it is intuitive. The shell units are made up of nominally flat folded sheets transformed effectively into shell forms whose static-strength properties are controlled by geometric quantities characteristic of ruled surfaces. The presented original approach to the shaping of the shell roof structures determining specific complex building forms allows us to go beyond the limitations related to the orthotropic structure of the folded roof sheeting and the shape transformations.

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“…Based on his experimental studies, Winter [31,32] modified Von Karman's Formula for stiffened (Eq. (2-4)) and unstiffened compression elements (Eq.…”

Section: Effective Width Methods (Ewm)mentioning

confidence: 99%

“…Winter [31] was the first to determine the capacity enhancement of studs due to their attachment to sheathing. The method of calculation he proposed works slightly differently for beams and columns.…”

Section: Modelling Of Sheathed Cfs Membersmentioning

confidence: 99%

Performance of hybrid cold-formed steel panels

Kasaeian¹

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There has been a significant worldwide increase in the use of cold-formed steel (CFS) in low-rise residential structures as an alternative to timber. Improving the understanding of the behaviour of cold-formed steel framed domestic construction is important considering the greatly increased worldwide demand for such structures. CFS structures are used in many parts of the world including areas of moderate to high seismic activity such as Japan, the United States, and New Zealand and areas with cyclonic winds such as some parts of Australia.Australia is at the forefront of this technology, and its systems are most advanced worldwide, although due to the low seismicity in this region, little attention has been paid into studying the behaviour of CFS structures under earthquakes. The current study is one of the very few that investigates the lateral load capacity of CFS structures in addition to other properties of these systems. Lateral load resisting capacity of this system is usually its Achilles heel. The common bracing methods are not capable of economically resisting the high demands imposed on the system in high seismic regions or high wind areas.This study aims at evaluating the extra capacities that can be obtained by some common or not-so-common additional material such as screw fixed gypsum board in isolation or in combination with fillers such as foam-concrete. The CFS structure made in combination with fillers is called HYBRID in the current study. The filler material restrains the buckling of studs to some extent and participates in carrying the loads. As part of this study, an innovative bracing system is developed that works well under earthquake loads. The brace allows dissipation of energy to occur through yielding of strap braces over a long length without any failure at the connections or at the tensioning units.

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Strength of Thin Steel Compression Flanges

Cited by 152 publications

References 0 publications

Transformed Shell Structures Determined by Regular Networks as a Complex Material for Roofing

Transformed Shell Structures Determined by Regular Networks as a Complex Material for Roofing

Transformed Corrugated Shell Units Used as a Material Determining Unconventional Forms of Complex Building Structures

Performance of hybrid cold-formed steel panels

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