Post Tensioning: before, during and after the ban, Portsmouth

6 March, 2017 | 18:00 - 20:00

Venue address:

University of Portsmouth
Portland Building
Portland Street
Portsmouth PO1 3AH
United Kingdom
20 years after the
20 years after the "ban", we take a look at Post Tensioning.

About this event

It is now over 20 years since the end of the (then) Highways Agency "ban" on grouted post-tensioned bridges and 5 since the introduction of EN 1992, or more correctly, the withdrawal of BS 5400. It is however, not entirely clear either that post-tensioning has recovered from the moratorium or that designers are getting the best advantage for its use to EN 1992.

It therefore seems a good time to review the history and practice of pre-stress and particularly post-tensioning. This talk will mainly be based on post-tensioned bridges but pre-tensioning and post-tensioning in buildings, tanks and nuclear structures will also be mentioned. Conventional and less conventional design approaches will be considered.

The speaker will be: Paul Jackson BSc PhD CENG FIStructE FICE.

Paul is a Technical Director at Ramboll and first worked on post-tensioned structures in the 1970's and has served on BSi and CEN committees responsible for them since the 1980's. He worked on the construction of the first glued segmental balanced cantilever bridge in the UK and wrote the HA rules on external prestress. He has also been involved in post-tensioning of tanks and nuclear structures. He has been involved as designer, checker or provider of design approaches in many major post-tensioned projects both on new and existing bridges, including Medway, Wadebridge, 2nd Severn, Kingston and more recently the award winning strengthening to Hammersmith flyover.

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