Numerical study on bending resistance of cold‐formed steel back‐to‐back built‐up elements

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 487-494
Author(s):  
Ivan Lukačević ◽  
Viorel Ungureanu ◽  
Anđelo Valčić ◽  
Ivan Ćurković
Keyword(s):  
Numerical Study ◽  
Bending Resistance ◽  
Cold Formed Steel ◽  
Up Elements

scholarly journals Experimental Study and Direct Strength Method for Cold-Formed Steel Built-Up I-Sectional Columns under Axial Compression

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Xingyou Yao
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
Numerical Study ◽  
Experimental Results ◽  
Distortional Buckling ◽  
Cross Sectional ◽  
Direct Strength Method ◽  
Comparison Results ◽  
Cold Formed Steel ◽  
Interactive Buckling

The objective of this paper is to investigate the buckling behavior and design method of the ultimate strength for the cold-formed steel (CFS) built-up I-sectional columns under axial compression which failed in distortional buckling and interactive buckling. A total of 56 CFS built-up I-sectional columns subjected to axial compression were tested, and the different buckling modes and ultimate strengths were analyzed in detail by varying the thickness, the length, the spacing of screws, the end fastener group, and the cross-sectional dimensions of CFS built-up I-sectional columns. It was shown in the test that noticeable interaction of local and distortional buckling or interaction of local, distortional, and global buckling was observed for the built-up I-sectional columns with different lengths and cross-sectional dimensions. A finite element model (FEM) was developed and validated with experimental results. A further parametric study has been conducted including different cross sections and slenderness ratios for the built-up I-sectional columns. The load-carrying capacities obtained from the experimental and numerical study were used to investigate the feasibility of the current direct strength method (DSM) when DSM was applied to CFS built-up I-sectional columns. The comparison results showed that the current DSM is not safe for CFS built-up columns failed in distortional buckling and interactive buckling. Therefore, the improved design formulas were proposed, and their accuracy was verified by using finite element analysis (FEA) and experimental results of CFS built-up I-sectional columns subjected to axial compression.

Numerical study on the rotation capacity of CFRP strengthened cold formed steel beams

2017 ◽  
Vol 23 (4) ◽  
pp. 385-397
Author(s):  
Mohammed H. Serror ◽  
Essam G. Soliman ◽  
Ahmed F. Hassan
Keyword(s):  
Numerical Study ◽  
Steel Beams ◽  
Rotation Capacity ◽  
Cold Formed Steel

scholarly journals Experimental and Numerical Study of Lattice Girder Composite Slabs with Monolithic Joint

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 219
Author(s):  
Xuefeng Zhang ◽  
Huiming Li ◽  
Shixue Liang ◽  
Hao Zhang
Keyword(s):  
Numerical Study ◽  
Element Model ◽  
Design Codes ◽  
Numerical Studies ◽  
Bending Resistance ◽  
Composite Slabs ◽  
Scale Experiment ◽  
Final Crack ◽  
Lattice Girder ◽  
Overall Bending

This paper studies the behavior of lattice girder composite slabs with monolithic joint under bending. A full-scale experiment is performed to investigate the overall bending resistance, deflection and the final crack distribution of latticed girder composite slab under uniformly distributed load. A finite element model is given for the analysis of the latticed girder composite slabs. The effectiveness and correctness of the numerical simulations are verified against experimental results. The experimental and numerical studies conclude that the lattice girder composite slabs conform to the requirement of existing design codes. A parametric study is provided to investigate the effects of lattice girder with following conclusions: (a) the lattice girder significantly increases the stiffness of the slab when comparing with the precast slab without reinforcement crossing the interface; (b) the additional reinforcement near the joint slightly increases the stiffness and resistance, while it prevents damage near the joint.

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