Finite Element Parametric Study of Bearing Strength of Unconfined Cold Formed Steel Bolted Connection

DOI

10.2991/978-94-6463-672-7_12How to use a DOI?

Keywords

Bearing Strength; Cold-formed Steel; Finite Element Model; Bolted Connection

Abstract

Investigation on unconfined connection with bolts of cold formed steel (CFS) is recommended in the commentary of North American cold form steel specification. This study is focused on ultimate bearing strength of unconfined bolted connection of CFS. Unconfined bolted connection model was developed and analyzed using ANSYS Workbench software and verified by experimental data of Australian Research Council funded laboratory test. Unconfinement and edge distance are not considered in American Iron and Steel Institute (AISI) equation for bearing strength of bolted connection of CFS. Study was conducted on the verified model for varying thickness, from 0.5 mm to 1.5 mm range and edge distance to bolt diameter ratio ranging from 0.5 to 2.5. Crimpling of unconfined plies in finite element model were exactly matched with experimental failure mode. For different thickness, bearing capacity was found in positive linear trend. Comparison between CFS bolted connection strength from FEM and general equation of AISI shown the ineffectiveness of the equation in case of unconfined plies. AISI equation predict ultimate bearing strength almost twice than found from FEM. In case of edge distance to bolt diameter ratio when the value is reduced less than 1 ultimate bearing strength falls drastically. A minimum edge distance to bolt diameter ratio of 1 is recommended from this study in case of unconfined bolted connection. Equation of Eurocode for CFS Bolted connection is not also adequate for unconfined plies as found unconservative from this study.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Akib Mohammad Sunny
AU  - Md Faiyaz Shahriar
AU  - Mostafa Mahmud
PY  - 2025
DA  - 2025/04/04
TI  - Finite Element Parametric Study of Bearing Strength of Unconfined Cold Formed Steel Bolted Connection
BT  - Proceedings of the 1st International Conference on Recent Innovation in Civil Engineering and Architecture for Sustainable Development (IICASD-2024)
PB  - Atlantis Press
SP  - 131
EP  - 139
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-672-7_12
DO  - 10.2991/978-94-6463-672-7_12
ID  - Sunny2025
ER  -