Robustness of beam to column end-plate moment connections with stainless steel bolts subjected to high rates of loading
Robustness of beam to column end-plate moment connections with stainless steel bolts subjected to high rates of loading
This paper presents an experimental investigation into end-plate beam column connections for buildings. The work demonstrates that a four-fold increase in the energy absorbed to failure can be achieved by replacing carbon steel bolts with their stainless steel counterparts. Experimental tests were carried out under load control and these provided the opportunity to observe the time required for connection fracture. Under quasi-static loading, connections tested with stainless steel bolts showed clearly visible signs of distress prior to failure; whereas the carbon-steel bolted equivalents provided no warning of failure prior to brittle fracture.
Experimental tests were carried out on bolts and these showed strain rate induced strength enhancements. End-plate connections were also tested under high strain rates. Loading rate was not observed to significantly affect the performance of stainless steel bolted connections. However, carbon-steel bolted connections were observed to weaken under high strain rates, therefore dynamically increased material properties did not always translate into increase connection strength. The design strengths predicted using Eurocode 3 were found to be in good agreement with the experimentally observed values under quasi-static loading for both bolt types. Under high-strain rate conditions the Eurocode 3 method was also found to provide a good prediction for stainless steel bolted connections; but was found to over predict for carbon-steel connections.
The simple modification of replacing carbon-steel bolts with their stainless steel equivalents is shown to be an effective way of improving the performance of industry standard connections. This modification is of relevance to the design of buildings and other structures in which the ductility is of high importance, for example in structures which may need to resist transient loads from blast or impact.
1-12
Culache, George
4e746a0d-811a-4c69-bf62-143552980ea5
Byfield, Mike
35515781-c39d-4fe0-86c8-608c87287964
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Tyas, Andy
2de975f6-ae0a-4604-936b-c94f46831eb3
June 2017
Culache, George
4e746a0d-811a-4c69-bf62-143552980ea5
Byfield, Mike
35515781-c39d-4fe0-86c8-608c87287964
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Tyas, Andy
2de975f6-ae0a-4604-936b-c94f46831eb3
Culache, George, Byfield, Mike, Ferguson, Neil and Tyas, Andy
(2017)
Robustness of beam to column end-plate moment connections with stainless steel bolts subjected to high rates of loading.
Journal of Structural Engineering, 143 (6), , [04017015].
(doi:10.1061/(ASCE)ST.1943-541X.0001707).
Abstract
This paper presents an experimental investigation into end-plate beam column connections for buildings. The work demonstrates that a four-fold increase in the energy absorbed to failure can be achieved by replacing carbon steel bolts with their stainless steel counterparts. Experimental tests were carried out under load control and these provided the opportunity to observe the time required for connection fracture. Under quasi-static loading, connections tested with stainless steel bolts showed clearly visible signs of distress prior to failure; whereas the carbon-steel bolted equivalents provided no warning of failure prior to brittle fracture.
Experimental tests were carried out on bolts and these showed strain rate induced strength enhancements. End-plate connections were also tested under high strain rates. Loading rate was not observed to significantly affect the performance of stainless steel bolted connections. However, carbon-steel bolted connections were observed to weaken under high strain rates, therefore dynamically increased material properties did not always translate into increase connection strength. The design strengths predicted using Eurocode 3 were found to be in good agreement with the experimentally observed values under quasi-static loading for both bolt types. Under high-strain rate conditions the Eurocode 3 method was also found to provide a good prediction for stainless steel bolted connections; but was found to over predict for carbon-steel connections.
The simple modification of replacing carbon-steel bolts with their stainless steel equivalents is shown to be an effective way of improving the performance of industry standard connections. This modification is of relevance to the design of buildings and other structures in which the ductility is of high importance, for example in structures which may need to resist transient loads from blast or impact.
Text
__filestore.soton.ac.uk_users_mpb_mydocuments_A1_PAPERS_Journals_2060 ASCE Culache SS bolts_Working file for paper_Text Figures Tables_Accepted manuscript.pdf
- Accepted Manuscript
Text
__filestore.soton.ac.uk_users_mpb_mydocuments_A1_PAPERS_Journals_2060 ASCE Culache SS bolts_Working file for paper_Text Figures Tables_metadata_Results for bolts and coupons.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 27 September 2016
e-pub ahead of print date: 1 February 2017
Published date: June 2017
Organisations:
Civil Maritime & Env. Eng & Sci Unit
Identifiers
Local EPrints ID: 400544
URI: http://eprints.soton.ac.uk/id/eprint/400544
ISSN: 0733-9445
PURE UUID: 79165764-c318-4d77-aefd-277eb9b2ec64
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Date deposited: 16 Sep 2016 13:43
Last modified: 15 Mar 2024 05:54
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Contributors
Author:
George Culache
Author:
Mike Byfield
Author:
Andy Tyas
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