Unbraced steel frame design according to EC3 and AISC provisions

Bernuzzi, Claudio; Cordova, Benedetto; Simoncelli, Marco

doi:10.1016/j.jcsr.2015.07.012

Cited by 14 publications

(21 citation statements)

References 18 publications

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“…ELM resulted in approx. 6 % larger stress interaction ratios for all the cases in the study compared with DAM, which is in agreement with the results of Bernuzzi et al [4]. The portal frames studied were also shown to be sensitive to the effect of geometrical imperfections.…”

Section: Conclusion and Recommendationssupporting

confidence: 91%

“…The possibility of flexural-torsional buckling under combined bending and compression must be considered. To ensure the limit state is reached, AS 4100 (section 8.4.4.1) requires the following equation to be satisfied: (4) where: jN cy axial capacity of rafter or column for buckling about the y axis jM bx flexural-torsional buckling capacity…”

Section: Compression Membersmentioning

confidence: 99%

“…Meanwhile, AS 4100 utilizes the effective length method (ELM) for the stability design and analysis of steel structures. Bernuzzi et al [4] conducted research on unbraced frame and discovered that the AISC-DAM method results in 8 % larger load-carrying capacity than that calculated using the AISC-ELM method. In other words, the concept of the effective length method (ELM) is more conservative when compared with the direct analysis method (DAM) adopted in AISC 360-16 [1].…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the design of single‐span steel portal frames using the effective length and direct analysis methods

Ingkiriwang

Far

2018

Steel Construction

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The era of globalization enables the design, fabrication and erection of steel structures to take place in different locations far away from each other. Therefore, a widely acceptable steel design standard is required, and designers should be familiar with alternative specifications that may be considerably different from one another. This study deals with single-span unbraced steel portal frames and makes a comparison between the design methodologies adopted by the Australian and American design provisions, in particular, the effective length method (ELM) and direct analysis method (DAM). A brief discussion on the main features of both standards is also presented. Furthermore, the results of the parametric study are portrayed, highlighting the differences between these two design standards regarding stress interaction. Finally, of the two aforementioned methods, the most applicable optimization method for the design and development of cost-effective industrial portal frame buildings is proposed with respect to the structure geometry.

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Section: Conclusion and Recommendationssupporting

confidence: 91%

Section: Compression Membersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the design of single‐span steel portal frames using the effective length and direct analysis methods

Ingkiriwang

Far

2018

Steel Construction

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“…A recent study on conventional moment-resisting frames made of hotrolled members [8,9] demonstrated non-negligible discrepancies among the predicted design alternatives allowed by the European (EU) [10] and United States (US) [11] provisions. In this paper, the attention is focused on isolated TWCF members and on the most common design approaches adopted in Europe and USA.…”

Section: Single Open Sectionsmentioning

confidence: 99%

Experimental vs. Theoretical Design Approaches for Thin-Walled Cold-Formed Steel Beam-Columns

Baldassino¹,

Bernuzzi²,

Simoncelli³

2019

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The response of thin-walled cold-formed (TWCF) members is significantly influenced by local and distortional buckling phenomena as well as by their interactions with overall instability. Furthermore, because of the frequent use of monosymmetric cross-section members, their design is often complex and laborious engineering calculations are required, independently of the adopted provisions. With reference to the Europea n (EU) and United States (US) design standards, which are the most commonly adopted worldwide, different alternatives can currently be used: a direct comparison between the predicted load carrying capacities should hence be of great interest for structural engineers and manufacturing technicians. This issue is discussed in the paper, which is focused on isolated TWCF beam-columns. In particular, 5 EU and 2 US alternatives have been discussed focusing attention on the pure theoretical approaches to evaluate the member performance. The applicative part proposes a direct comparison between the associated axial force bending-moment domains investigating the influence of the member slenderness as well as of the moment distribution. Furthermore, these alternatives have been applied to predict the strength of members tested in laboratory for which the behavior of an adequate number of nominally identical specimens has been thoroughly investigated. The proposed statistical re-elaboration of test data, which is comprised of 8 practical cases differing for cross-section sizes, materials and length, for a total of 112 compression tests, allows for defining the experimental design performance to be directly compared with the corresponding one associated with the considered design approaches.

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“…Due to the great interest in the comparison of different standard codes, a research project has been developed on the design methods according to European (EU) and United States (US) steel provisions. At first, attention has been focused on the more traditional carpentry steel frames made by hot-rolled I-shaped members: similarities and differences between the EN 1993-1-1 [1] and AISC360-10 [2] have been discussed by Bernuzzi et al [3] summarizing the main results of a comparative parametric study carried out on more than 700 multi-story semi-continuous planar frames. In the second step, the approaches adopted for adjustable pallet racks have been considered and the design alternatives admitted by EU [4] and US [5] codes have been discussed and applied with reference to selective pallet racks realized by bi-symmetric cross-section members [6,7].…”

Section: Introductionmentioning

confidence: 99%

EU and US design approaches for steel storage pallet racks with mono-symmetric cross-section uprights

Bernuzzi

Simoncelli

2017

Thin-Walled Structures

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Design, fabrication and erection of industrial steel storage rack systems can nowadays take place at different locations, potentially separated by thousands of kilometers. Consequently, manufacturing engineers need to understand the main code provisions adopted in the country where the rack will be in-service. Frequently, design is carried out in accordance with the European (EU) or United States (US) rack codes, which are the most commonly adopted standards for industrial storage systems. As appraisal of the key differences on structural performance associated with the different code provisions in term of storage performance, a previous study of the Authors was focused on storage pallet racks comprised of bi-symmetric cross-section uprights (vertical members). Now, attention is paid to racks with mono-symmetric uprights, typically influenced by relevant warping effects, which are traditionally neglected by rack provisions and, as a consequence, by manufacturing engineers. The design approaches already considered and compared for bi-symmetric uprights now appear to be inadequate and have been necessarily improved, as suggested by the Authors, including at least the contribution due to the bimoment acting along mono-symmetric uprights. Research outcomes, which are discussed in the paper, are related to a parametric analysis on several racks differing for configurations, geometry of components and degree of rotational stiffness of joints. The associated results regarding the four EU and two US considered alternatives are presented and compared directly to each other to allow for a concrete appraisal of the most relevant differences between the admitted design approaches. In order to highlight the importance of warping effects, which can be evaluated only by means of refined finite element (FE) analysis software, design has been undertaken using also the more traditional FE beam formulation implemented in the commercial analysis packages most frequently used in manufacturing offices. Finally, Appendix A presents a complete design example to be used as benchmark, where all the discussed design options are applied and compared to each other

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Unbraced steel frame design according to EC3 and AISC provisions

Cited by 14 publications

References 18 publications

Numerical investigation of the design of single‐span steel portal frames using the effective length and direct analysis methods

Numerical investigation of the design of single‐span steel portal frames using the effective length and direct analysis methods

Experimental vs. Theoretical Design Approaches for Thin-Walled Cold-Formed Steel Beam-Columns

EU and US design approaches for steel storage pallet racks with mono-symmetric cross-section uprights

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