User Area
Software Release History for Version 15
Index |
Version
15.2 | Version
15.1 | Version 15.0
New Facilities and Improvements
in LUSAS Version 15.2
Release history
V15.2-4 - made available on 27 October 2016
This release is an
error fix release for the following Change Requests:
- Multi-linear joint error - THE
MULTILINEAR CURVE FOR MATERIAL # FREEDOM # HAS A VERTICAL SEGMENT
(RDPRPS PROCESSOR) - due to tabulation error (CR
19294)
- The shrinkage computation for
Concrete Creep Model Eurocode 2 is incorrect for members with
nominal member size ratios of between 1.0 > hr <= 5 (CR
20586)
- Analysis will not converge after a
nonlinear concrete material is replaced with a temperature
dependent material table with the same constant properties (CR
20678)
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to Software download page
V15.2-3 - made available on 2 August 2016
This release is an
error fix release that also contains which also contains two specific
enhancements:
- New Zealand Transport Agency precast
beams are now provided in the standard section library.
- New Zealand SP/M/022 3rd edition
Amendment 2 has been added to the Traffic Load Optimisation
facility.
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to Software download page
V15.2-2 - made available on 25 May 2016
This release is an
error fix release.
V15.2-1 - made available on 16 February 2016
This release
contains the following
enhancements:
LUSAS Traffic Load Optimisation -
new design codes added
LUSAS Traffic Load Optimisation -
speed-up
For design codes that employ a
carriageway division strategy such that a remaining area could result
- and this includes
Eurocode EN1992-1 and AASHTO (both Standard specifications and LRFD) -
the time taken to perform a LUSAS Traffic Load Optimisation analysis
has been reduced. See LUSAS Traffic Load
Optimisation - speed-up.
LUSAS Traffic Load Optimisation - new design
codes added
Australia
5100-7:2004 (Austroads) loading
LUSAS now performs
traffic load optimisation to Australian Standard AS5100.7-2004, Bridge
design, Part 7: Rating of existing bridges, Clause A2.2. This facility
adds to the Australian traffic loading facilities to AS5100-2, which
is for design of new structures, which were released in v15.0.
AS5100.7-2004 Article
A2.2 essentially reproduces the 1992 AUSTROADS Code which has been
available in previous versions of LUSAS. The new implementation
removes several limitations, notably allowing any carriageway
alignment (not restricted to straights and arcs), allowing use on 2D
beam models and with quadratic order elements, and removing all
restrictions on coordinates of the model. The new implementation also
allows access to a "Summary results" table for traffic
loading, which gives a resume of peak load effects without requiring
either the explicit definition of load patterns within the
model, or a subsequent static analysis. It is also considerably faster
to optimise traffic loads than the previous Austroads implementation.
United Kingdom -
BA34/90 loading
LUSAS Traffic Load
Optimisation now supports UK standard BA34/90. The upgrade comes
together with the upgrade of traffic load optimisation facilities for
UK assessment code BD21/01 and in tandem with the launch of facilities
for BD86/11.
Existing UK highway
bridges which are assessed as adequate to carry the 40t loading of
BD21/01 may then be assessed for their capacity with respect to
Special Types General Order (STGO) vehicles, as per BD21/01 clause
5.12. The current Code of Practice relating to assessment for STGO and
SO vehicles is BD86/11, however, prior to 2001 STGO ratings were
assessed using HB vehicles to BA34/90 and BA34/90 is still used by
some highway authorities for comparison to previous assessments or
other purposes.
The new facility
allows determination of peak load effects caused by the most onerous
arrangements of traffic loads according to BA34/90 (with reference to
BD21/01 and BD37/01 as appropriate). Critical traffic load patterns
can be also be visualised and combined with other structural loads. In
common with the implementation of traffic loading to BD86/11, the
facility provides flexibility appropriate to traffic restrictions
which the highway authority might impose in order to ensure the safe
transit of exceptional vehicles.
United Kingdom -
BD21/01 loading
LUSAS Traffic Load
Optimisation now supports UK standard BD21/01 (section 5). The upgrade
comes together with the launch of traffic load optimisation facilities
for UK assessment codes BA34/90 and BD86/11.
The BD21/01 upgrade
includes a new dialog, designed to make it easier for engineers to
assess the significance of the selected traffic flow and road
surfacing categories in determining the acceptable Load Level. It also
removes several limitations of the previous version, notably allowing
any carriageway alignment (not restricted to straights and arcs),
allowing use on 2D beam models and with quadratic order elements, and
removing all restrictions on coordinates of the model. In addition, the
new implementation of BD21/01 allows access to a "Summary
results" table for traffic loading, which gives a resume of peak
load effects without requiring either the explicit definition of load
patterns within the model, or a subsequent static analysis. It is also
considerably faster to optimise traffic loads than the previous
implementation.
United Kingdom -
BD86/11 loading
LUSAS Traffic Load
Optimisation now supports UK standard BD86/11. The upgrade comes
together with the upgrade of traffic load optimisation facilities for
UK assessment code BD21/01 and in tandem with the launch of facilities
for BA34/90.
Existing UK highway
bridges which are assessed as adequate to carry the 40t loading of
BD21/01 are deemed, in BD86/11 clause 1.3.1, adequate for vehicles
complying with The Road Vehicles Construction and Use (C&U)
Regulations and Authorised Weight (AW) Regulations. Bridges which have
some spare capacity under BD21/01 may therefore be assessed for
adequacy to carry one (or both) of the following:
-
Vehicles
complying with The Road Vehicles (Authorisation of Special Types)
General Order (STGO) Regulations (see BD21/01 clause 5.12). Five
SV load models simulate the effects of real STGO vehicles as per
BD86/11 clause 3.10
-
Special Order
(SO) Vehicles. Four SOV load models simulate the effects of real
SO vehicles within limits set out in BD86/11 clause 3.12, Table
3.1.
The new facility
allows determination of peak load effects caused by the most onerous
arrangements of traffic loads according to BD86/11 (with reference to
BD21/01 for accompanying Assessment Live Loading as appropriate). Critical
traffic load patterns can also be visualised and combined with other
structural loads.
As per clause
1.5(ii), the facility provides flexibility to modify the Overload
Factor, Dynamic Amplification Factor and the associated Type HA
Loading which may appear in the same lane as any exceptional vehicle
or in other lanes on the bridge - corresponding to the highway
authority's possible use of traffic restrictions to ensure the safe
transit of exceptional vehicles, imposition of a speed limit for the
exceptional vehicle etc.
United
States of America AASHTO Standard Specifications (17th Edition)
LUSAS Traffic Load
Optimisation now supports AASHTO Standard Specification (17th
Edition). When the country 'United States of
America' and the Design code 'AASHTO Standard Specifications 17th Ed', is selected on the
main Vehicle Load Optimisation dialog, road traffic loading data and
parameters can be specified with reference to AASHTO Standard
Specifications for Highway Bridges, 17th Edition, 2002
A number of US State Bridge Design Manuals' implementations
can also be selected.
Implementation
of AASHTO LRFD (7th Edition) for Pennsylvania
LUSAS Traffic Load
Optimisation now supports AASHTO LRFD (7th Edition) as interpreted by the PennDOT Design Manual - Part 4, May 2012, with
implementation notes as shown below:
- Combinations
Strength IP, Extreme III, Extreme IV, Service I (with PL), Service
IIB, Service III (with PL), Service IIIA and Service IIIB are
included as per PennDOT Design Manual Part 4 Part B clause 3.4
- The
design tandem’s axles are increased to 31.25kips as per PennDOT
Design Manual Part 4 Part B clause 3.6.1.2.3
- The P-82
permit load as per PennDOT Design Manual Part 4 Part B clause
3.6.1.2.7P is included in combinations Strength II, Extreme III,
Extreme IV, Service IIB, Service IIIA and Service IIIB. It is
available in one lane with PHL-93 in other lanes if “Include
associated notional design load (as above) in other lanes” is
checked, or in every lane if the option is unchecked. The P-82
permit load has its own dynamic load allowance setting on the
Advanced settings dialog
- An
option is included for “Truck loading on continuous spans”
with gives the option of “100% (for moments)” or “90% (for
reactions)”. This option only affects the pair of design trucks;
if a single truck is more onerous it will always be at 100%. The
pair of tandems is similarly unaffected. NB Loading for continuous
spans is only applicable if the “Alternative load pattern”
option is selected, per influence, on the influence selection
dialog
LUSAS Traffic Load Optimisation - speed-up
For design codes that employ a
carriageway division strategy such that a remaining area could result
- and this includes
Eurocode EN1992-1 and AASHTO (both Standard specifications and LRFD) -
the time taken to perform a LUSAS Traffic Load Optimisation analysis
has been reduced. The speed-up takes advantage of the fact that the
transverse position of some lanes will be the same across all the deck
lane arrangements (of two or more lanes). Results are cached for the
lanes and reused, when necessary, across the deck lane arrangements.
User manuals
Relevant online and printed
documentation has been updated for this release. Manuals are provided
in PDF format as part of any V15 software download file or on the V15
software DVD.
Worked examples manuals
Relevant Application Manual (Bridge,
Civil & Structural) worked examples have been updated for this
release. Manuals of Worked Examples are provided in PDF format as part
of the LUSAS software download file or release DVD.
Potential issues opening PDF files referenced in CHM files
On some PCs, and for certain operating systems, the installation of security updates as released by Microsoft can affect the opening of PDF files from the table of contents panel within the CHM file-based help system. Any links to PDF files from within help topic pages may similarly be affected. If problems are found when attempting to open these files from within the online CHM file supplied please note the following:
- All manuals are supplied in PDF format on the installation kit and these are normally installed into the <LUSAS Installation Folder>/Programs/PDF_Manuals folder.
- Workarounds/solutions may be provided by Microsoft during the availability and support of this particular LUSAS software release.
Retired elements, material models and facilities
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