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Rationale for simplifying the strength formulae for the design of multi-row bolted connections failing in net tension
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Mottram, J. Toby (2013) Rationale for simplifying the strength formulae for the design of multi-row bolted connections failing in net tension. In: 6th International Conference for Advanced Composites in Construction (ACIC 2013), Queen’s University of Belfast, 10-12 September 2013. Published in: Proceedings 6th International Conference on Advanced Composites in Construction (ACIC 2013) pp. 383-392.
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WRAP_Mottram_8773432-es-291113-mottram_jt_acic_3013_conf_10-12_09_2013-2.pdf - Accepted Version Download (344Kb) | Preview |
Official URL: http://www.acic-conference.com/
Abstract
Hart-Smith [1] developed a set of closed form strength formulae for a semi-empirical approach to determine the net tension strength of multi-row bolted connections with composite materials. Mottram [2] showed that, for a pultruded fibre reinforced polymer material, the approach to be reliable (and conservative) for the configuration comprising two rows with a single bolt per row. This led to the formulae being developed into clauses in an American pre-standard for Load and Resistance Factor Design (LRFD) of Pultruded Fiber-Reinforced Polymer (FRP) Structures [3]. Because the expressions in the Hart-Smith formulae are not simple, the message coming from the practitioners, on the ASCE/SEI Fiber Composites And Polymers Standards committee (FCAPS) tasked with developing the pre-standard [3] into a standard, is that they would not use them when designing bolted connections. Taking stock of the specified geometries, bolt details and design parameters permitted by the pre-standard [3] the author conducted an analytical
parametric study using the Hart-Smith formulae with the aim of establishing simplified forms that could be routinely used in the design office. Presented in this paper is the provenance to this code-specific work when the connection has more than a single row of bolts. A presentation is given to what has been lost, in terms of calculated net tension strength, by providing the
simplified strength formula in the mandatory part to the standard. To enable the designer to be able to take full advantage of the Hart-Smith design approach [1, 2], the ‘complicated’ formulae and their accompanying mandatory-style text are to be found in an appendix with the standard’s commentary [3].
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Composite materials , Composite materials -- Mathematical models , Engineering design | ||||
| Journal or Publication Title: | Proceedings 6th International Conference on Advanced Composites in Construction (ACIC 2013) | ||||
| Publisher: | NetComposites Ltd. | ||||
| Official Date: | September 2013 | ||||
| Dates: |
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| Page Range: | pp. 383-392 | ||||
| Status: | Peer Reviewed | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/H042628/1 (ESPRC) | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 6th International Conference for Advanced Composites in Construction (ACIC 2013) | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Queen’s University of Belfast | ||||
| Date(s) of Event: | 10-12 September 2013 |
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