Structural response of cold-formed lipped Z purlins – Part 2 numerical modelling and optimisation of lip size

Almatrafi, Meshal; Theofanous, Marios; Dirar, Samir; Bock, Marina

doi:10.1016/j.tws.2021.107453

Cited by 4 publications

(9 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been ascertained that reducing the nominal lip size of sections from its current value of 20 mm would result in a decrease in efficiency, whereas increasing the nominal lip size would yield benefits for certain sections [17]. Additionally, sections with the narrowest lip dimension were found to fail under the stiffener buckling phase [18].…”

Section: Impact Of Lipsmentioning

confidence: 99%

Effects of Lip Length and Inside Radius-to-Thickness Ratio on Buckling Behavior of Cold-Formed Steel C-Sections

Hussein,

Hussein

2024

Buildings

View full text Add to dashboard Cite

Cold-formed steel (CFS) sections constructed with high-strength steel have gained prominence in construction owing to their advantages, including a high strength-to-weight ratio, shape flexibility, availability in long spans, portability, cost-effectiveness, and design versatility. However, the thin thickness of CFS members makes them susceptible to various forms of buckling. This study focuses on addressing and mitigating different types of buckling in columns and beams by manipulating the lip length (d) and the ratio of inside radius to thickness (Ri/t) in CFS C-sections. To achieve this objective, a comprehensive analysis involving 176 models was conducted through the Finite Element Method (FEM). The findings reveal that an increase in lip length leads to a corresponding increase in critical elastic buckling load and moment (Pcrl, Pcrd, Pcre, Mcrl, Mcrd, and Mcre). It is recommended to utilize a lip length greater than or equal to 15 mm for both columns and beams to mitigate various buckling types effectively. Conversely, an increase in the ratio of inside radius to thickness (Ri/t) results in an increase in critical elastic local buckling load (Pcrl) and moment (Mcrl). Thus, lip length (d) significantly influences column and beam buckling, whereas Ri/t exhibits a relatively impactful effect. Subsequently, the experimental test results were used to verify finite element models. These insights contribute significant knowledge for optimizing the design and performance of CFS C-sections in structural applications.

show abstract

Section: Impact Of Lipsmentioning

confidence: 99%

Effects of Lip Length and Inside Radius-to-Thickness Ratio on Buckling Behavior of Cold-Formed Steel C-Sections

Hussein,

Hussein

2024

Buildings

View full text Add to dashboard Cite

show abstract

“…The employed test configuration was designed to simulate the behaviour of simply supported purlins under uniformly distributed loads (UDL) and avoid lateral torsional buckling. The aim of the tests was to obtain fundamental structural performance data to be used for the development and validation of a FE model capable of replicating numerically the experimentally observed structural response as reported in the companion paper [36].…”

Section: Experimental Programmementioning

confidence: 99%

“…The effect of initial geometric imperfections on the structural response of purlins is studied in detail numerically in the companion paper [36].…”

Section: Loaddeformation Responsementioning

confidence: 99%

“…Finally, both the EN1993-1-3 [10,11] and the DSM [8] were seen to offer conservative and consistent strength predictions, with the DSM predicting on average 8% higher strengths than the EN 1993-1-3 and correctly predicting the experimental failure mode as distortional buckling. The obtained experimental failure modes and load-deformation responses are utilised in the companion paper to validate the developed numerical model [36], which are utilized to optimize the lip size of lipped Z-sections.…”

Section: Conclusion and Further Researchmentioning

confidence: 99%

“…This paper reports in detail an experimental study on cold-formed Z-purlins tested under conditions simulating gravity loading. The experimental results are utilized to assess the accuracy of the predictions of European [10,11] and American design standards [8] and as a benchmark against which numerical models utilized in the optimization of the lip depth of Z sections are validated in the companion paper [36].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural response of cold-formed lipped Z purlins – Part 1: Experimental investigation

Almatrafi

Theofanous

Dirar

et al. 2021

Thin-Walled Structures

Self Cite

View full text Add to dashboard Cite

Design Assisted by Finite Element of Z‐Purlins with Overlapping under Gravity Loading

Gîrbacea

Ungureanu

2022

ce papers

View full text Add to dashboard Cite

Cold‐formed steel Z‐purlins are generally designed to span continuously over rafters. The bending moment continuity or semi‐continuity is obtained by overlapping the profiles or using a sleeved connection. Lapped connections are regarded as superior in terms of stiffness and resistance compared to their sleeved counterpart. A finite element model was developed and validated against experimental results to be used in a parametric study. The study investigated the influence of parameters such as: cross‐section dimensions, span length, symmetrical and unsymmetrical overlap lengths, connection detailing, trapezoidal sheeting thickness and connection. The numerical results show that the mechanical behavior of overlapped purlins loaded by gravity is mainly influenced by the span and the length of overlapping. The connection detailing is particularly important for short overlaps.

show abstract

Structural response of cold-formed lipped Z purlins – Part 2 numerical modelling and optimisation of lip size

Cited by 4 publications

References 19 publications

Effects of Lip Length and Inside Radius-to-Thickness Ratio on Buckling Behavior of Cold-Formed Steel C-Sections

Effects of Lip Length and Inside Radius-to-Thickness Ratio on Buckling Behavior of Cold-Formed Steel C-Sections

Structural response of cold-formed lipped Z purlins – Part 1: Experimental investigation

Design Assisted by Finite Element of Z‐Purlins with Overlapping under Gravity Loading

Contact Info

Product

Resources

About