What's New in STAAD.Pro V8i SS5, Build 20.07.10.65 ( 29 Oct 2014)

(A) Issues addressed in the Analysis/Design engine (27)

A) 01 The inclusion of the new Russian steel design code SP 16.13330.2011 adversely affected the design routines for both Russian steel codes, SNiP 2.23.81-1999 and SP 16.13330-2011. This has been addressed and the design result for a member is now available in the member query window by double clicking on a member and the governing design clause reported in the Post Processing Unity Check results table.

The following outlines the details of issues addressed in both codes.

The addition of the SP 16.13330-2011 code introduced a variable that was not correctly initialised for each member that was being designed. This resulted in that is would be possible that the second and subsequent members would not be correctly designed.
The design method used CHECK or SELECT was not being reported correctly in the output file.
The pagination has been improved to ensure that all details for a TRACK 2 that exceed a page length are included on a new page and not truncated from a hard copy.
The details from the design are now included in a Steel Design sheet of a member query.
The governing clause and ratio is now reported in the Post Processing mode, Beam>Unity Check Page, Design results table.

Members subject to axial tension were being checked as though subject to compression.
The compression slenderness calculation as per clause 6.15 was not being properly recorded.

A) 03 The processing of a FLOOR DIAPHRAGM has been updated to ensure that if either XRANGE or ZRANGE is used in a command, then this will be used to define a limited area for the diaphragm.

A) 04 The presence of CHANGE command along with rigid diaphragm is internally corrupting any load data present after the CHANGE command. When a rigid diaphragm is included in the model, the program internally generates primary load cases to calculate the Centre of rigidity. This has now been addressed.

A) 05 The IS 1893 Spectrum processing routine has been updated to account for conditions where INACTIVE MEMBERS are included which would result in generating a Read/Write failure and cause the analysis to stop.

A) 06 The IS1893 Part 4 code has been corrected in processing the SS (type of soil) and SA (spectral acceleration) terms. These were being inverted, ie soil type taken as the SA value and spectral acceleration as the SS value.

A) 07 The processing of a completely vertical cable with the Advanced Cable analysis has been addressed.

A) 08 The Advanced Cable Analysis output has been enhanced with details of instabilities and zero stiffness warnings if present.

A) 09 The Advanced Cable Analysis routine has been updated to catch any instance where the option SET NL has been used to specify a number of load cases less than those needed for the cable analysis and will issue the error message:- ***ERROR: THE MAXIMUM NO. OF LOAD CASES EXCEEDS LC. INCREASE SET NL INPUT.

A) 10 The command PRINT STOREY STIFFNESS should occur after an analysis command. If included before the analysis this was causing the program to crash. Now, this will report the following message and continue:- *** WARNING: STORY STIFFNESS IS NOT CALCULATED. PRINTING STORY STIFFNESS IS A POST-ANALYSIS FEATURE. 'CHECK IF ANALYSIS IS PERFORMED OR NOT.

A) 11 The analysis results for a response spectrum case with the SIGN and DOMINANT options has been further enhanced to ensure that if the response load case only includes node loads this is still handled in the same way as when member loads are included when establishing the section forces.

A) 12 The Canadian steel design code S16-01 has been corrected to address the the calculation of the effective area for class 4 (slender) angles under compression. The effective area calculation was only applying the reduction to a single leg of the angle, but should apply the reduction to both legs of each angle. This correction applies to both single and double angles.

A) 13 The Russian wind routine has been updated to ensure that the dynamic effects are correctly accounted for when the basic analysis engine is used. The results associated with the advanced solver were correctly resolved.

A) 14 The FEMA Pushover analysis routine has been updated to correct the calculation of the base shear which was in turn affecting the displacement calculations after formation of a hinge.

A) 15 The Canadian steel design code S16-01 report has been updated to ensure that the section classification for the critical condition is reported. Whilst it was being calculated and used correctly, it may not have been reported correctly. This has been corrected.

A) 16 The Advanced Cable analysis has been updated to catch loads that have been specified that are outside the scope of the analysis as outlined in the Technical Reference Manual section 1.18.2.8 Advanced Nonlinear Cable Analysis. Now, if inappropriate loads are specified, n error message is reported in the output file and the analysis stopped.

A) 17 The Advanced Cable analysis routine has been improved such that it is now possible to include multiple load cases with a single PERFORM CABLE ANALYSIS command.

A) 18 The analysis engine has been updated to now support Notional Load definitions when the model has been defined using a SET Z-UP definition.

A) 19 The AISC 360 2005/2010 codes have been updated to correctly calculate the slenderness ratios for double channel sections which prior were being reported as zero and thus failing the design with an interaction ratio of infinity.

A) 20 The AISC 360 2005/2010 codes have been updated to address an problem caused when including a FIXED GROUP command that resulted in the program to crash. This has been addressed.

A) 21 The AISC 360-05 ASD design check for tube sections has been updated to correct the minor axis shear capacity Vny and torsional design strength which was over estimating the utilization ratio.

A) 22 The TRACK 2 output from an AISC 360-05 for a member which is governed by the slenderness has been updated to ensure that the values of the design forces are reported correctly.

A) 23 The AISC 360 2005/2010 steel design routines have been updated to allow for higher torsional forces than before which would have displayed in the output file with a string of stars.

A) 24 The AISC 360-10 steel design routine has been updated to correct the calculation of compression capacity for a circular hollow or pipe section to clause E7-19.

A) 25 The processing of the AISC 360 parameter SNU for double angle and double channel sections, has been updated to ensure that when set to 0 (default) it represents a snug bolted fix using equation E6-1. When set to 1, it is treated as a welded or pre-tensioned bolted connection and use equation E6-2.

A) 26 The AISC 360 steel design reports have been updated for circular hollow sections defined in a PIPE user table. If values for shear area have been provided, these will be reported in a TRACK 2 output. However, note that the shear stress calculations in the AISC code are based on the gross area.