maritime works assessment of actions - the final stretch! (.pdf)
TRANSCRIPT
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
BS 6349: Part 1.2 Maritime Works Assessment of Actions
The Final Stretch!
Steve Osborn Committee Member -BSI Committee CB502
Atkins Fellow, Chief Maritime Engineer
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
PART 1 – Code of practice for general criteria
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
PART 1 – Code of practice for general criteria
Environmental considerations (forces
rather than conservation!) Operational considerations Sea State (a very
extensive section)
Loads movements and vibrations
Geotechnical Considerations
Materials
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
PART 1 – Code of practice for general criteria Being split into 4 parts:
Part 1-1: General – Code of practice for
planning and design for operations Part 1-2: General – Code of practice for
assessment of actions Part 1-3: General – Code of practice for
geotechnical design Part 1-4: General – Code of practice for
materials
The challenge of Part 1
Published 2013 Almost there! Published 2012 Published 2013
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
THANKS TO DAVID VEALE AND HIS TEAM
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
THANKS TO DAVID ROWBOTTOM AND ALEC
COURTS
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
THANKS TO PETER KEEL AND JON KNIGHTS
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Part 1-1: General – Code of practice for planning and design for operations
Part 1-2: General – Code of practice for
assessment of actions Part 1-3: General – Code of practice for
geotechnical design Part 1-4: General – Code of practice for
materials
The challenge of Part 1
3 Slides 3 Slides 3 Slides
6 slides!
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
THANKS TO SIMON BURCHETT AND A CONSIDERABLE TEAM
EFFORT
The challenge of Part 1
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
Combinations of actions and structural design
Wave and water level conditions
Actions loads and hydraulic responses
New. Supersedes BS 6349 Part 2, Section 4 and Appendix A
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
Much Information in Annexes
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
For example, linear wave theory information
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
For example, wave transformations
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
For example, wave prediction curves
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Approach to the revision
For example, hydraulic loads
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Waves and sea states
Keeping this section brief
New information Climate change – completely new Wave characteristics – now more focus on spectral and
non-linear theories (previous heavily based in linear theory)
Offshore wave climate – new/ updated to focus more on use of global numerical hindcast sources rather than empirical hindcasts or visually observed data
New sections on joint (dependent) probability
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Waves and sea states
Substantial re-writes of sections on numerical and
physical modelling New sections concerning wave actions on coastal
structures, including new sections on scour due to vessels.
Major re-write of section on wave action on walls and decks Not as definitive as in BS 6349 Part 1:2000.
Updated references taking account of most recent guidance/ literature available.
Re-writing to provide clearer distinction between normative recommendations and informative text.
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Presently BS 6349 Part 2 deals with the Eurocode interface
In future Part 1.2 will deal with it
Part 1.2 builds on experience of operating the Eurocodes.
Corrects some very long standing anomalies that existed since BS 6349 Part 2:1988 with respect to environmental loads. e.g. a misconception on the definition of “normal” and
“extreme” environmental conditions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Hierarchy of control in the Eurocodes
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Hierarchy of control in BS6349 now
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Hierarchy of control in BS6349 when Part 1.2 is
published
The Eurocode Material Standards,
e.g. BS EN 1993 Part 2, Eurocode 3 – Design of Steel Structures, Part 2 ,
Steel Bridges
BS 6349 Part 1.2 –
The Actions Code and Controlling Code
combined
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Combination formulae
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Partial Factors
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Partial Factors
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Partial Factors
Most variable loads have 1.5 partial factor
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Partial Factors
For most variable actions, partial factors have been set at 1.50.
For elastomeric fenders, typical partial factor has been set at 1.35 – a reduction
Because the latest version of Part 4 requires additional load to allow for tolerances in rubber.
Not reasonable increase load factors since loads are highly predictable and more factors are taken into account
Still some minor adjustments to be made.
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Combination Factors
Approach similar to BS 6349 Part 2 However anomalies have been noticed, notably
seismic combinations.
Seismic Combination
Pre-stress
Permanent action Seismic action
Variable action (modified by 𝝍𝝍 𝟐𝟐
factor)
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Combination Factors Some last minute thinking is being done
Cranes have zero ψ2
Containers have ψ2 = 0.3
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Combination factors
From BS EN 1990, some other options
Presently based on Category A, B or G
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Combination factors
From BS EN 1990, some other options
Perhaps it should be based on Category C,D,or E?
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Other loadings
Reach stackers
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Other loadings
RTGs
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Loadings and EC Interface
Other loadings
And some last minute deliberations about container stacking loads
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
A first step into seismic design
Limited guidance at present
The whole of seismic design covers many issues which Part 1.2 does not cover
New seismic guidance will be included in other parts
For now, all we do is define the seismic action (ground motion)
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
BS EN 1998 parts 1,2 and 5 are the key references
Definition of seismic guidance is structured to that.
PIANC produced a document WG34 in 2001
Most recent guidance is in ASCE 61-14.
There is goodwill from the UK seismic community to orient maritime seismic design towards EC8
But few people with the competence to organise it!
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
EC 8 is based on 2 levels of earthquake
BS 6349 gives guidance on assessing them
Ground motions have similar return periods to those in EC8 rather than PIANC
In general we also refer to the importance classes from EC8
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
EC 8 requires checks against two performance criteria
Required for the Level 1 earthquake
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
EC 8 requires checks against two performance criteria
Required for the Level 2 Earthquake
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
ASCE 61-14 is probably the most advanced code relating to suspended jetties
Sadly does not yet include retaining wall type structures.
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
ASCE 61-14 has three requirements
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
ASCE 61-14 defines the applicability of the three requirements as follows:-
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
This is still work in progress
It is proposed to include this neat table:-
Performance factor allows conversions for ASCE 61-14
“Controlled and repairable damage” requirement
EC 8 Importance class and factors (for Damage limitation and No Collapse requirements
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Seismic issues
Table 5 allows the user to point to:- EC8 where required (e.g. for retaining type quay
walls) ASCE 61-14 where required (e.g. for
jetties/suspended slabs)
Further guidance will follow.
Decision for the CB502 committee! Include in in Parts 2 to 8 Draft a specific part for Maritime Works, seismic
design For either we are hoping that the experts who
assisted can continue to help.
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
CONTENTS
The challenge of updating Part 1
Approach to the revision
Waves and sea states
Loadings and the new interface with the Eurocodes
Seismic issues
Conclusions
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Conclusions
The great work is completed! (er….almost!)
The coverage remains huge.
About 7 years work
The interface for all parts of BS 6349 to face to all parts of the Eurocodes is now rationalised
Already getting noticed internationally The Eurocode committee TC250/WG6 preparing the
wave actions EC is thinking about using Part 1.2 as a basis.
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Acknowledgements
Initial thinking: William Allsop Jan De Waal Terry Hedges Dick Thomas Simon Burchett Partial factors: Steve Osborn Adrian Douglas David Smith Graeme Walker Sea-state: Jo Evans Simon Burchett John Fenton Mark Calverley Dominic Hames
Peter Hunter Peter Hawkes Hydraulic/ environmental actions: Simon Burchett Simon Everitt Giovanni Cuomo Ian Cruickshank Gareth Evans Operational actions: Chris Boysons David Veale Mark McBride Roger Allen Andy Cook Peter Stebbings Peter Beamish
Seismic actions: Steve Osborn David Smith Jack Pappin Ziggy Lubkowski Edmund Booth Helge Frandsen Iain Tromans Dimitrios Pachakis
BS 6349 Part 1.2- Actions
The Final Stretch!
Steve Osborn
BS 6349 Essential Update for
the Ports and Maritime Community
8th February 2016
Corporate support
Aecom Arup Atkins CH2M Edmund Booth HR Wallingford Mott MacDonald Ramboll Royal HaskoningDHV
Acknowledgements