Known Bugs & Limitations PT

[8/22/2012] Support width input when hinged/pinned supports are used (Bug 4901)
If the option for “no columns” is used leading to an automatic hinged support and you enter a support width in the ‘Boundary Conditions’ input, the program resets the support width values to zero as you navigate through the input windows.  The workaround is to not go back to the support width input prior to execution or if you do pass through the support width input, you need to go back to this at the end of your input and modify and then execute.  This will be fixed for PT 2013.

[11/3/2011] Geometry input for two-way slabs composed of ‘T’ sections in ADAPT-PT (Bug 4418)
When lateral loads are input they will not be considered in the initial analysis. As a workaround you must go back to the lateral load input and re-enter the joint moment values.

[5/23/2011] Cantilever loads on left cantilevers (Bug 4318)
In some instances, when a point load is applied at the tip of a left cantilever, the load is not considered in the analysis.  To make certain that load is considered, enter the point load just to the inside of the edge of cantilever.  For example, if the cantilever is 10′, apply the load at 9.9.’  This bug has been fixed for ADAPT-PT 2012 soon to be released.

[3/15/2011] Geometry input for two-way slabs composed of ‘T’ sections in ADAPT-PT (Bug 4215)
When a ‘T’ section is used for a two-way slab in combination with drop caps or panels, the depth of section must be less than the depth of cap otherwise the drop will be ignored.  For example, if the drop is 22″ deep, the depth of section must be 21.99″.

[3/9/2011] User-defined stress diagrams in ADAPT-PT (Bug 4209)
After execution of a model and exiting the Recycler screen the program will revert back to the “shell” allowing the user to review graphical/tabular/summary output.  If you select the graphical stress results, you can review stresses for a user-defined combination and input specific load factors to any load case.

The problem is that there is a mismatch between the sequential order of load cases where you input the factors and the Combination for combined stress factors at the bottom of the graph.  This combination is LF*DL + LF*LL + LF*SDL + LF*XL + LF*PT.  The factors that you input are applied in this order.  So, when you input factors the solution for SDL will show LL result, XL will show SDL and LL will show XL.  As a workaround you must “trick” the program by inputting factors in the position of the load combination.  For example, if you want solution for 1.0*SW + 2.0*LL + 1.0*PT, you would put a 1.0 for Selfweight, 2.0 for Superimposed Dead Load and 1.0 for Post-tensioning.

[2/15/2011] Minimum Reinforcement incorrect for rectangular beams when modeled with flanged beams (Bug 4195)
When rectangular beams are modeled with flanged beams, the program is calculating a larger Areq for minimum rebar (0.004*Act) for the rectangular beams.  The results are conservative.  The workaround is to model the rectangular beams as flanged beams where ‘bf’ is equal to or slightly greater than ‘b.’

[11/16/2010] Data Section 10.3 of the Concise Report is shifting into Section 11 (Bug 4134)
If the amount of base reinforcement plus prestressing steel is enough to satisfy the demand for strength and service rebar, the program is shifting the tabular output for base rebar (Data block 10.3) into Section 11 of the concise report from Report Generator.  The data in Sections 10.1, 10.2, 11.1 and 11.2 are blank since no reinforcement is necessary in this scenario. The same is happening in ADAPT-RC 2010.

[11/16/2010] Calculation of Icr when Base Reinforcement is used
The program does not consider base reinforcing when calculating the cracked moment of inertia (Icr).  Only calculated reinforcement and PT steel are used.  This will affect the deflection results  when Ma>Mcr (when cracking exists for a given load stage).  This bug has been reported and will be repaired in the next update.

[11/5/2010] ADAPT-PT 2010 report mispelling
The word “Center” is mispelled in Table 7 of the PT output.

[11/5/2010] ADAPT-PT 2010 shear reinforcing summary
When the stress ratio at a given section is greater than 1.0 and requires shear reinforcing, the program will report **** indicating that the maximum shear stress (5sqrt*f’c) is exceeded.  The program does not report any reinforcing in the tabular output for this condition.  The user needs to manually calculate the quantity and spacing.  The summary sheet will show a spacing value at the same location.  This value is determined using the calculated value for Vc from Equation 11-9 in ACI 318-05.  The tabular results control over summary.  This has been reported and will be resolved shortly.

[7/9/2010] ADAPT-PT 2010 cracking moment calculation
When ADAPT-PT 2010 calculates the cracking moment (Mcr = S*(P/A + ft) for deflection calculations, it is using the allowable sustained stress value (e.g. 6 sqrt f’c) instead of the total stress value for the term ‘ft’ in the above equation.  This is typically OK since the allowable stress values are the same for “Sustained” and “Total” service conditions.

If a design requires you to modify this value for a condition where you are checking deflection for a beam in which stresses can exceed 7.5 sqrt f’c, be sure to modify the sustained value.  This bug is scheduled for repair in the next update to PT2010.

[7/7/2010] ADAPT-PT 2010 HELP menus
In ADAPT-PT 2010, the HELP>Contents menu does not appear when pressing it.  As a workaround, their are two HELP files located in the program files directory.  You can copy these files to any location and access the HELP contents from double-clickin on these files.  They are “PTinput.CHM” and “PTshell.CHM.”

[6/16/2010] ADAPT-PT 2010 uses the “Sustained” service combination for determining the required PT force (Bug 3875)
In ADAPT-PT 2010, the program is using the allowable stress value for the sustained condition in determining the required PT force.  Three scenerios are presented:

1. If the multiple of sqrt f’c for sustained and total are the same value (i.e. 6, 7.5  or 12), the results in recycler are correct.

2. If the multiple of sqrt f’c for sustained is less than that for total, the required force in the PT recycler screen will be greater than what it needs to be.  This is conservative.  The stress results in Tab 4 are still correct and compared to the input values for the associated service condition.

3. If the multiple of sqrt f’c for sustained is greater than that for total, the required force in the PT recycler screen will be less than what it needs to be.  This is unconservative.  The stress results in Tab 4 are still correct and compared to the input values for the associated service condition.

If you have different values for sustained and total allowable stresses at tension fiber, it is recommended to review the stress level carefully and adjust the force according to the stress level, such that allowable stresses are not exceeded.

[6/8/2010] Elongations are not calculated correctly when “Force Selection” method is used in Recycler
In ADAPT-PT8 and PT 2010, the user has the option to select either “Force Selection” or “Calculated Force” for the calculation option.  If “Calculated Force” is selected and the model is executed, the Recycler screen will show both methods as being active.  If the user toggles to the “Force Selection” method in the Recycler screen and executes the analysis, Report Section 15 will show erroneous values for elongation.

Note that if “Force Selection” is selected initially as the caculation option, the program does not activate this report to begin with since using the force method the designer assumes all losses have occured and are using the effective force for design.

[5/20/2010] Calculation of reinforcement when initial tensile stresses are exceeded (this is a known limitation, not a bug)
At each design section for each span the program calculates stresses, tensile and compressive, for the initial condition, as specified by the user.  This is typically 1.0*SW + 1.15*PT.  If the stresses at a section exceed the allowable for tension AND compression, the program WILL NOT calculate the required reinforcement for the tensile overstress.

It is the responsibility of the user to check the initial stress values in the recycler screen and determine if a compressive overstress occurs.  If so, the initial concrete strength, f’ci should be increased or some other measure should be taken to acheive an acceptable solution.  Once the stress is below the allowable for compression, the program will report the reinforcement if tensile ovestress still occurs at the same section.

[5/7/2010] Graphical Anomoly for One-Way and Two-Way Slabs when Rh is set as greater/lesser than “0” (Bug 3832)
This bug is related to PT8.00.5 and PT2010.  When the reference height, Rh, is set as some value less than or greater than zero (default value) and transverse beams, drop panels or drop caps are modeled, the graphical representation of the slab and initial control points in the Recycler screen appear incorrect.  As a workaround, exit the Recycler screen and open the geometry input for transverse beams or drops and re-analyze.  The program will correct itself and the correct graphical view and control points will appear in the Recycler screen.

[4/23/2010] Tendon Import from ADAPT-PT 2010 to Floor Pro 2009 results in errors (fixed in Builder 2010 build 0/PT 2010 build 1)
When importing tendons from ADAPT-PT 2010 to ADAPT-Floor Pro 2009, the program will report two error messages stating the the following files are not found:

PT_TO_FP.end
FILENAME_pt.tdn

Unlike earlier versions of ADAPT-PT, the new version now compiles all intermediate and result files inside a MODELNAME subdirectory where the MODELNAME.ADB is located. This bug will be fixed for Builder 2010. As a workaround, the two files listed above need to be moved or copied to the directory where the .adb file and the subfolder is located.

[4/8/2010] Column Stiffness % reduction in ADAPT-PT (fixed in PT 2010 Build 0)
for PT2010, when the column stiffness is changed (%) in the column geometry input, this value is used for the analysis.  The next time you open the input editor the values are reset to 100%.  The user must reset the value each time input is changed if using a value other than 100%.  NOTE: This only occurs when you have multiple % values.  If you modify all columns by one particular value, these do not reset. For PT8, the same problem occurs as above, however, when multiple values are input, the % value of the first column is used for analysis.

[3/31/2010] PT steel is being used for strength calculations when UBC code check is selected for one-way slabs or beams.  THIS IS SPECIFIC TO ADAPT-PT v2010 Build 0
When the UBC code check is used for one-way slabs or beams, the program uses the PT steel in determination of moment capacity.  This is not permitted for this code check.  As a workaround, you can choose to ignore PT for strength check in DESIGN SETTINGS and run this as an individual run to give the correct amount of reinforcement for this particular load case (UBC DL + 0.25LL).

 [2/12/2010] Shear Reinforcement for ‘I’ sections
When ‘I’ sections are used, the top flange width must be greater than the stem width for the shear reinforcement calculations to be initiated.

[2/1/2010] Deflections of One-Way Slabs with Transverse Beams (fixed in PT 2010 Build 0)
When transverse beams are used as the supports for one-way slabs, the deflection output is incorrect.  A workaround is to use pin supports in lieu of transverse beams.

[2/1/2010] Report Generator compatibility with 64-bit systems (fixed in PT 2010)
Report Generator is not compatible with PT8 or earlier versions on 64-bit systems.  This issue has been resolved and will be included in the next release for PT2010. Update: As a workaround for PT8, you can open the XXX.cre file in Word, Notepad or Wordpad and print the report. 

[2/1/2010] Tendon B not activating (fixed in PT 2010)
When data for Tendon B is input in the RECYCLER screen the graphical view will show a straight tendon with no profile and the output will not include the affect of Tendon B. As a workaround, in the TENDON PROFILE input box where the inflection points are set, simply click on the “Tendon B” tab and continue with the input. This will activate the tendon. This has been repaired for the next release.

[2/1/10] Anchorage of tendons B and C (fixed in PT 2010)
If the anchorage tendons B and C are located away from the centroid of section, the balanced loading for the tendons is not correct.  As a workaround, anchor the tendons at the centroid.  This has been repaired for the upcoming release.

 [1/20/10] Minimum rebar for one-way system (fixed for PT 2010)
The program calculates and places the minimum rebar (As=0.004A where A is the area of that part of cross section between flexural tension face and center of gravity of gross section) for one-way system based on the tensile zone of the moment curve. However, it should be based on the stress curve. We are working on this issue and will have it fixed in a future release. In the meantime, please review the stress curve in PTsum to find out whether the tension is on top or bottom.

 [1/20/10] Rebar in models with steps
In case where you have a step in your structure with negative Rh (reference line is on top of your slab/beam), you might receive an incorrect amount of rebar in some cases. Workaround: use a positive Rh (meaning the reference line is on the bottom of your slab/beam) to model your structure and you will receive the correct amount of rebar. We are working on this issue and will have it fixed in a future release.

 [1/20/10] Skip pattern of live load not considered for deflection calculation
The skip pattern of live load is not considered for deflection calculation. The reported deflection is based on the pattern where the live load is acting on all the spans.

 [1/20/10] Load combination export from ADAPT-Builder into ADAPT-PT
Currently, ADAPT-Builder exports one service and one strength load combination to PT v8. In addition to those load combinations, we allow you to specify three service, three strength and the initial load combinations in PT v8 without unlocking the model. We are working on allowing the user to export up to four strength and service load combinations each.

 [1/20/10] CDN 94 code issues
At this time, there are some mismatches in the allowable stress calculation of punching shear and one-way shear. We are working on this issue and will have it fixed in a future release.

 [1/20/10] Friction .exe error (fixed for PT 2010)
In cases you selected “Automatic” for execution mode and simultaneously you have selected “Calculate force/number of tendons”, at execution you will receive a friction.exe error message. As a workaround, you must select “Interactive” as your execution mode on the “Design Sections” input screen.