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Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending
Thesis (PhD (Civil Engineering))--University of Pretoria, 2017.
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| Format: | Thesis |
| Language: | English |
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2026
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| _version_ | 1867613564265562112 |
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| access_status_str | Open Access |
| author2 | Roth, Chris P. |
| author_browse | Roth, Chris P. |
| author_facet | Roth, Chris P. |
| collection | Thesis |
| description | Thesis (PhD (Civil Engineering))--University of Pretoria, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/110193 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:08.659Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/110193 Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending Roth, Chris P. renier@prokon.com Cloete, Renier Steel connections Design Baseplate Thesis (PhD (Civil Engineering))--University of Pretoria, 2017. Very little guidance exists on the design of steel column base connections for biaxial flexure combined with axial compression. This study aims to develop a design method for designing these connections for combined loading. To this end, an extensive experimental programme that consisted of 32 tests to failure, was carried out. The programme varied plate thickness, holding-down bolt diameter, axial force level and loading angle. Ancillary tests were carried out to establish material strengths and to assess the importance of bond to the design of the connection. The programme was augmented with detailed finite element analyses that were calibrated with the experimental results. It was found that the contribution of bond to the final anchorage strength of the connection is negligible and should be ignored. Very little concrete damage was observed during the experimental phase and current design guidance for concrete bearing strength is very conservative. Increases in plate thickness, holding-down bolt diameter and axial force were found to increase the connection strength. Increases in loading angle, from strong-axis to weakaxis bending were found to decrease connection strength. Furthermore, the plate thickness and holding-down bolt parameters were found to be interdependent. Increases in axial compression were found to increase the initial connection stiffness. Finally, a new mechanical model is proposed for designing base connection. The model enables the construction of thrust-moment interaction diagrams that can be used directly for design. A shortened listing of the source code used to generate the interaction curve in this work is included in the Appendix. Civil Engineering PhD (Civil Engineering) 2026-05-15T17:26:37Z 2026-05-15T17:26:37Z 18/08/02 2017 Thesis http://hdl.handle.net/2263/110193 en application/pdf |
| spellingShingle | Steel connections Design Baseplate Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title | Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title_full | Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title_fullStr | Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title_full_unstemmed | Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title_short | Behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| title_sort | behaviour and design of unstiffened steel column base connections under uniaxial and biaxial bending |
| topic | Steel connections Design Baseplate |
| url | http://hdl.handle.net/2263/110193 |