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Released May 15, 2017 with Design Office 11, Service Release 1
Because the newly added wind story drift limitations from ASCE 7 CC.1.2 can be difficult to meet and are not mandatory according to ASCE 7 Appendix C, a design setting has been added to activate the calculation of wind story drift, and Option setting and Show menu item to allow you to turn off the output of story drift output tables independently for wind and seismic design.
A new data group called Wind serviceability ASCE 7 CC.1.2 has been added to the Design Settings page. In it there is a new checkbox allowing you to control whether to calculate story drift for wind loads, and the existing setting to enter the drift limit as a ratio of storey height.
The Options setting controlling which design results tables to view that previously said Storey shear table is now two settings Story shear – seismic and Story shear – wind.
The Show menu now has two items – Story drift – seismic and Story drift - wind instead of just Story drift.
Several problems associated with perforated walls, particularly with the capacity adjustment factor Co from SDPWS 4.3.3.5, were corrected:
The program calculated Co factors significantly greater than 1.0 while using SDPWS Equation 4.3-5 (as opposed to Table 4.3.3.5), when there are narrow segments in the wall, because the SDPWS does not explicitly limit Co to 1.0. When there are no narrow segments to which an aspect ratio factor is applied, as per the note to the definition of ∑Li in 4.3.3.5, the minimum limit of h/3 the opening height ensures that Co can never be greater than 1.0, but it can be when the aspect ratio factor is applied.
This was particularly evident when there are no openings in the wall and no need for a perforation factor, but one was made anyway on the assumption that it would always be 1.0. The program now limits Co to 1.0, and does so even when there are openings, as we believe this to be the intention of the SDPWS.
Occasionally, the Shear Results output table displays the Co factor for a wall on the story immediately above a wall, rather than the correct factor for that wall, and shows a capacity and design ratio based on that factor. This is just a reporting issue, and these values were not used to design the wall or determine deflections and force distribution.
The following bugs apply to the perforated shearwalls such that one or more openings in the shearwall have no full-height segments between them and one end of the wall, so that the non-full height segments and adjacent openings have been stripped from the wall for calculation of Co.
The problems are particularly evident when there are no openings left in the truncated wall and no need for a perforation factor, so that the Co factor should be 1.0, and the factors were showing up as any number.
The incorrect Co factors appeared in the shear results table and in elevation view, and were used in the calculation of shearwall capacity and hold-down forces.
These problems all been corrected.
For truncated perforated shearwalls the value of the total opening area Ao in SDPWS equation 4.3-5 still included the length the openings that should have been ignored. The total shearwall length Ltot was calculated correctly by excluding the openings, leading to nonsensical values of Co.
For seismic design of truncated perforated shearwalls, the total shearwall length Ltot in note 2 of Table 4.3.3.5 was sometimes including the length of the segments and openings that should have been ignored, whereas the sum of segment lengths ∑Li excluded them, leading to incorrect Co values. For wind design the correct Ltot was used, leading to inconsistent seismic and wind Co values.
Truncated perforated shearwalls were showing the anchorage uplift force t from SDPWS 4.3.6.4.2.1 on non-full-height segments that had been ignored in the calculation of Co.
This uplift force t appears in elevation view and is not used for other calculations and has no effect on shearwall design or force distribution. It has now been removed from these segments.
Following a specific sequence of wall input steps, it was possible to create a gap in the exterior footprint, rendering the project file unusable.
This occurred when an opening was than extends to the very end of a wall, meeting a perpendicular wall. If the location of the wall with the opening is then moved, followed by moving the wall it meets, the gap is created.
This problem has been corrected.
When a wall was underneath a gable end from a monoslope roof, the hold-down forces calculated were nonsensically large. This has been corrected.
Occasionally, when project files were opened in Structure view, they did not allow the activation of the input form button and did not show the Structure Input form. Upon moving to any other view, the program would crash.
This problem could be avoided by pressing the Structure input button, after which the program operated as it normally does. The program no longer crashes when this happens, but it is still necessary to click the Structure button to view the Input form.
The following bugs pertain to the disabling and re-enabling of the Design Setting Ignore contribution of … Gypsum-based materials … combined with wood structural panels … based on the state of the Allow 3.5:1 aspect ratio setting,
The disabling/enabling happened only when the Ignore contribution of … All gypsum materials …seismic design setting was unchecked. This was the behaviour of the corresponding settings for the previous version, but with the SDPWS 2015 implementation, these settings should now be independent. This setting is now enabled whenever Allow 3.5:1 aspect ratio is checked.
When the checkbox is disabled, the program now still shows the text explaining the setting, instead of greying it out.
The word "table" has been removed from several Options Settings in the Display design results group, as it had been inconsistently applied to some design results tables and not others. The setting that previously said Materials table now says Sheathing/framing materials; in all other cases the word "table" has just been excised.
The data group title Ignore non-wood-panel contribution… has changed to Ignore contribution of…. so that the elision of the title and the checkbox text, which had been changed for the 2015 SDPWS implementation, now makes grammatical sense.