Oasys Greta Change Log

Contents

• Greta 19.3
  • New Features
  • Fixes
• Greta 19.2
  • New Features
  • Fixes
• Greta 19.1
  • New Features
  • Fixes
• Greta 19.0
  • New Features
  • Fixes
• Greta 18.2 Build 1
  • New Features
  • Fixes
• Geo 18.1 Build 5
  • New Features
  • Fixes
• Outstanding Bugs

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Greta 19.3: New Features

• New functions have been added to COM interface.

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Greta 19.3: Fixes

• Issue with high shear stressses and bending moments in the heel.
  [GRETA-168] (Released in Greta 19.3 SP0 Build 1)
• The program is crashing when the groundwater level is greater than the ground level for bending moment calculations.
  [GRETA-172] (Released in Greta 19.3 SP0 Build 1)
• The moment from loads applied on wall w.r.t toe get cumulatively added up from bearing capacity case to bending moment case.
  [GRETA-173] (Released in Greta 19.3 SP0 Build 1)
• Bearing capacity calculations sometimes show non numeric values for bearing pressures.
  [GRETA-165] (Released in Greta 19.3 SP0 Build 1)
• Soil pressures under base for the case of rotation towards heel are computed incorrectly.
  [GRETA-175] (Released in Greta 19.3 SP0 Build 1)
• The soil pressure distribution under the wall for heel/toe bending moment calculation is incorrect when the resultant lies outside the middle third.
  [GRETA-176] (Released in Greta 19.3 SP0 Build 1)
• The program gives incorrect error message when the soil layer level coincides with the wall's base level.
  [GRETA-150] (Released in Greta 19.3 SP0 Build 2)
• The values do not update in Tabular output when user modifies data in analysis option dialog.
  [GRETA-158] (Released in Greta 19.3 SP0 Build 2)
• Correction in Help Manual about delta to be used in Material Properties for shear at front and backside of base of wall.
  [GRETA-178] (Released in Greta 19.3 SP0 Build 2)
• The Greta COM function SetGravityWallLevelAtTop(...) is not working.
  [GRETA-179] (Released in Greta 19.3 SP0 Build 2)
• Junk values get assigned to "Wall geometry" variables on calling COM functions.
  [GRETA-182] (Released in Greta 19.3 SP0 Build 3)
• Company name and logo path are truncated when re-opening file.
  [GE-577] (Released in Greta 19.3 SP0 Build 5)
• The software crashes when water level coincides with the top of the base of the Gravity wall if crest offset from back is provided any non zero value.
  [GE-820] (Released in Greta 19.3 Build 6)
• The input units of dimensions of wall doesn't match the units of wall in graphical output.
  [GE-876] (Released in Greta 19.3 Build 6)
• Greta taking wrong values of lever arms for horizontal loads.
  [GE-1007] (Released in Greta 19.3 Build 6)
• Optimise base function enters warning dialogue which goes into infinite loop.
  [GE-904] (Released in Greta 19.3 Build 6)
• COM functions returning error - Com function "SetGravityWallLevelAtBase" is unable to read data (i.e. Wall type ) and hence throwing exception.
  [GE-263] (Released in Greta 19.3 Build 6)
• Greta Gabion wall bug - the soil behind the gabion basket is incorrectly computed.
  [GE-1814] (Released in Greta 19.3 Build 6)
• Greta 19.3 EC7 DA1 C2 should throw an error message or note when H>A'Cu, for EC7 DA1 C2 Undrained condition.
  [GE-1556] (Released in Greta 19.3 Build 6)
• A negative value of Sliding resistance is calculated.
  [GE-928] (Released in Greta 19.3 Build 6)
• The program should update the method used for reducing mobilized passive pressures in bearing capacity case.
  [GE-271] (Released in Greta 19.3 Build 6)
• Error in applying partial factor to moment.
  [GE-2111] (Released in Greta 19.3 Build 6)
• Correct error in 'Average ground level across the toe'
  [GE-2110] (Released in Greta 19.3 Build 6)
• Error in representation of Soil Layer in Graphical Output
  [GE-2127] (Released in Greta 19.3 Build 6)
• Error in representation of Graphical Output for Gabion Wall
  [GE-2134] (Released in Greta 19.3 Build 6)
• The Software is not responding when analysis is done for Ground Level behind wall is less than top edge of base of Gabion Wall
  [GE-2135] (Released in Greta 19.3 Build 6)
• Wrong Values printed for unsaturated density of material
  [GE-2166] (Released in Greta 19.3 Build 6)

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Greta 19.2: New Features

• Partial factors added to program.
• Option for calculated earth pressure coeffcicients using either the CIRIA C516 or Eurocode 7 methods.
• A number of load cases are now added, including strip, line, rectangular and horizontal surcharge loads.
• Additional wall types now allowed, including crib, gabion and gravity walls - also allowing for inclined walls.

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Greta 19.2: Fixes

• Stated FoS pass/fail comment in tabular output is not always consistent with calculated value.
  [NCR 9273] (Released in Greta 19.2 SP0 Build 5)
• Compaction pressure options are not automatically available.
  [NCR 9290] (Released in Greta 19.2 SP0 Build 5)
• Potential for crash in graphics view if passive and active pressures are zero.
  [GRETA-81] (Released in Greta 19.2 SP0 Build 6)
• Optimise base function defaulting to 0 length toe and heel rather than using user specified lengths.
  [GRETA-82] (Released in Greta 19.2 SP0 Build 6)
• For delta and cw program was wrongly expecting user to reduce prior to factoring, rather than factoring then reducing by ratio as per EC7.
  [GRETA-84] (Released in Greta 19.2 SP0 Build 6)
• Potential for errors when calculating the impact of discrete loads offset a significant distance from the wall.
  [GRETA-86] (Released in Greta 19.2 SP0 Build 6)
• For line loads applied over walls the sign of the resultant moment about the toe is reversed.
  [GRETA-88] (Released in Greta 19.2 SP0 Build 7)
• Warning of potentially unreliable results, even when there is clearly no issue with results.
  [GRETA-89] (Released in Greta 19.2 SP0 Build 8)
• Error in calculating the mass of soil in the wall block in isolated cases.
  [GRETA-90] (Released in Greta 19.2 SP0 Build 8)
• Error in gravity wall dialog, values not opened to correct box.
  [GRETA-91] (Released in Greta 19.2 SP0 Build 9)
• Error calculation of shear and bending for gabion type walls.
  [GRETA-92] (Released in Greta 19.2 SP0 Build 9)
• Further error calculating soil weight in some cases with groundwater.
  [GRETA-93] (Released in Greta 19.2 SP0 Build 9)
• Crash on opening graphical view.
  [GRETA-94] (Released in Greta 19.2 SP0 Build 9)
• Error in pressure profile for strip load at zero offset from wall.
  [GRETA-95] (Released in Greta 19.2 SP0 Build 10)
• Error in display of toolbar.
  [GRETA-96] (Released in Greta 19.2 SP0 Build 10)
• Error calculating total moment on walls with UDL extended over the soil wall block.
  [GRETA-97] (Released in Greta 19.2 SP0 Build 11)
• Errors in tabular output, mislabelled load type, K calculation method and typo errors.
  [GRETA-98] (Released in Greta 19.2 SP0 Build 12)
• Some loads on wall not factored.
  [GRETA-99] (Released in Greta 19.2 SP0 Build 12)
• Inconsistent use of terminology for failure type - sliding or overall.
  [GRETA-100] (Released in Greta 19.2 SP0 Build 12)
• Wall weight not factored for bearing calculation.
  [GRETA-101] (Released in Greta 19.2 SP0 Build 12)
• UDLs in front of wall erroneously acting as destabilising rather than stabilising.
  [GRETA-102] (Released in Greta 19.2 SP0 Build 12)
• Graphical error displaying UDLs in front of wall.
  [GRETA-103] (Released in Greta 19.2 SP0 Build 12)
• COM interface not registering.
  [GRETA-105] (Released in Greta 19.2 SP0 Build 13)
• Calculation errors where water level above ground surface on retained side.
  [GRETA-106] (Released in Greta 19.2 SP0 Build 14)
• Wrong units for unit weight in wall geometry input.
  [GRETA-109] (Released in Greta 19.2 SP0 Build 16)
• Program freezing on analysis, where back soil level at or below base of stem.
  [GRETA-110] (Released in Greta 19.2 SP0 Build 16)
• Potential calculation error where passive force exceeds active force + sliding resistance.
  [GRETA-111] (Released in Greta 19.2 SP0 Build 16)
• Manually entered factors not added when reopening file after saving.
  [GRETA-114] (Released in Greta 19.2 SP0 Build 17)
• Error in graphical output where material base is above ground level.
  [GRETA-116] (Released in Greta 19.2 SP0 Build 17)
• UDLs located 'Over' wall causing crash, warning required as this combination is not intended to be used.
  [GRETA-117] (Released in Greta 19.2 SP0 Build 17)
• Error calculating effect of eccentricity for DA1-1.
  [GRETA-118] (Released in Greta 19.2 SP0 Build 17)
• Crash in analysis after changing gravity wall geometry.
  [GRETA-122] (Released in Greta 19.2 SP0 Build 20)
• Inconsistent use of units in tabular output for overturning check.
  [GRETA-124] (Released in Greta 19.2 SP0 Build 20)
• Toolbar buttons disappear when screen text resized.
  [GRETA-125] (Released in Greta 19.2 SP0 Build 20)
• Analysis may crash if encounters bug identifying soil areas.
  [GRETA-128] (Released in Greta 19.2 SP0 Build 21)
• Output of friction angle in tabular output is incorrect.
  [GRETA-129] (Released in Greta 19.2 SP0 Build 22)
• Reinstate bending moment diagram along wall base.
  [GRETA-132] (Released in Greta 19.2 SP0 Build 22)
• Output of friction angle in tabular output is incorrect.
  [GRETA-133] (Released in Greta 19.2 SP0 Build 22)
• Adding partial factors set can cause the program to crash.
  [GRETA-134] (Released in Greta 19.2 SP0 Build 22)
• Base inclination angle is calculated incorrectly in some cases.
  [GRETA-135] (Released in Greta 19.2 SP0 Build 22)
• Issue warning when the unit weight partial factor used in the analysis is different from 1.00.
  [GRETA-136] (Released in Greta 19.2 SP0 Build 22)
• The EC7 calculations of Ka, Kp etc. are incorrect in some cases.
  [GRETA-131] (Released in Greta 19.2 SP0 Build 23)
• Factored friction angle and adhesion between foundation and soil are not printed correctly in tabular output.
  [GRETA-137] (Released in Greta 19.2 SP0 Build 23)
• Earth pressures are not plotted properly in the graphical output.
  [GRETA-140] (Released in Greta 19.2 SP0 Build 23)
• The units of shear force in the graphical output are printed incorrectly.
  [GRETA-141] (Released in Greta 19.2 SP0 Build 23)
• The graphical output shows the soil and water pressure profiles incorrectly in some cases.
  [GRETA-144] (Released in Greta 19.2 SP0 Build 23)
• The water pressures may be incorrect in some cases when piezometric pressure distribution is used.
  [GRETA-149] (Released in Greta 19.2 SP0 Build 23)
• The read only values of bearing capacity related cohesion and friction angle are not displayed correctly in foundation properties dialog.
  [GRETA-154] (Released in Greta 19.2 SP0 Build 23)

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Greta 19.1: New Features

• Added option to specify either active pressures, at-rest pressures, or user-defined pressures behind wall for structural design calculations.
• Added a new feature to apply compaction pressures behind wall, that are calculated according to CIRIA design guidance of retaining walls.
• Added option to specify ground inclination at the front of wall.

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Greta 19.1: Fixes

• Greta crashes when trying to view the tabular output of results for some files.
  [NCR 7660] (Released in Greta 19.1 SP0 Build 9)
• Units for anchor loads in table view are incorrect.
  [NCR 7950] (Released in Greta 19.1 SP0 Build 9)
• The undrained cohesion is not taken into account in bearing capacity calculations.
  [NCR 8519] (Released in Greta 19.1 SP1 Build 10)
• Warning message boxes during "optimize base" operation need to be disabled.
  [NCR 8683] (Released in Greta 19.1 SP1 Build 10)
• Greta crashes when the user specifies non-zero distance to shear key, but fails to provide dimensions for the shear key.
  [NCR 8684] (Released in Greta 19.1 SP1 Build 10)
• The graphical output shows gap between the soil behind wall and the wall face in some cases.
  [NCR 8686] (Released in Greta 19.1 SP1 Build 10)
• Miscellaneous improvements to graphical output.
  [NCR 8688] (Released in Greta 19.1 SP1 Build 10)
• The FoS for sliding appears to be incorrect.
  [NCR 8690] (Released in Greta 19.1 SP1 Build 10)
• The calculations should be terminated if the net horizontal force is towards heel.
  [NCR 8691] (Released in Greta 19.1 SP1 Build 10)

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Greta 19.0: New Features

• Added new Preferences dialog, Units dialog, Startup dialog and Help menu.

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Greta 19.0: Fixes

• Calculations of horizontal force from earth pressures on the front side of the wall appear incorrect.
  [NCR 3262] (Released in Greta 19.0 Build 1)
• Bearing capacity computed incorrectly.
  [NCR 3594] (Released in Greta 19.0 Build 1)
• Greta appears to assume ground level to the top of the wall's toe, in some of its calculations, even if the ground is set to be lower than that.
  [NCR 3961] (Released in Greta 19.0 Build 1)
• The values of dimensionless coefficients "dc" and "dg" are wrongly printed in the tabular output.
  [NCR 4120] (Released in Greta 19.0 Build 1)
• Shear force diagrams are not available.
  [NCR 4371] (Released in Greta 19.0 Build 1)
• Base pressures are not calcualted properly if the resultant horizontal force is zero.
  [NCR 4381] (Released in Greta 19.0 Build 1)
• Scaling is improper for the bending moment diagrams of toe and heel.
  [NCR 4387] (Released in Greta 19.0 Build 1)
• Base Pressures are not written to the file.
  [NCR 4392] (Released in Greta 19.0 Build 1)
• Bigger font button has no effect on tabular output printing.
  [NCR 4798] (Released in Greta 19.0 Build 2)
• Rebuilt to extend expiry date (Released in 19.0 Build 5)
• Some numbers in tabular output don't have correct format.
  [NCR 4425] (Released in Greta 19.0 Build 6)
• Application crashes when user attempts to close it on Windows 7.
  [NCR 4517] (Released in Greta 19.0 Build 6)
• Bearing capacity is negative for certain cases.
  [NCR 4659] (Released in Greta 19.0 Build 6)
• Optimised toe and heel lengths differ, when they shouldn't, depending on whether the "Include derivation of wall/base forces" checkbox is checked.
  [NCR 5179] (Released in Greta 19.0 Build 6)
• Earth pressures are being calculated incorrectly at the front of wall in some cases.
  [NCR 7410] (Released in Greta 19.0 Build 6)

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Greta 18.2 Build 1: New Features

• Calculation of ultimate bearing capacity of soil and bearing, sliding and overturning checks have been implemented.
• A tool for finding the most optimised base width of the wall to achieve full mobilization of soil strength has been implemented.
• A 'Gateway' window has been implemented to provide easy access to input data, tabular data and graphical views.
• The Greta Toolbar has been implemented to provide easy access to the most frequently used views and commands.
• The menu structure has been re-arranged to provide a separate 'Graphics' menu to access settings for the Graphical Output view.

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Greta 18.2 Build 1: Fixes

• Factor of safety taken input only as integers. i.e. factor of 1.5 is treating as 1.
  [NCR 1832] (Fixed 09 August 2007)(Released 13 August 2007 in Release 2)
• Vertical soil weight on back of wall incorrect
  [NCR 2351] (Fixed 24 December 2007)(Released 24 December 2007 in Release 3)
• Fixed the error in calculation of Pore water pressure which is leading a low bearing capacity values
  [NCR 2374] (Fixed 24 December 2007)(Released 24 December 2007 in Release 3)
• Installer rebuilt to extend program expiry date (Released 2 July 2009 in Release 4)

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Geo 18.1 Build 5: New Features

• Data files may now be emailed directly from the program's interface via the 'File' menu.
• The text output of the results view has been improved. It may now be exported to a range of file formats via the 'File' menu.
• Standard sets of units (SI, kN-m, kip-ft and kip-in) may be selected via the Units and Preferences dialog.
• So as to help users to ensure that they are running the latest software a new version checking system has been implemented. This compares each executable file installed locally with the set that Oasys identifies as being the 'current' version. (The comparison is carried out locally; no data is transmitted to Oasys.) Executables for which updates are available are highlighted. Updates may then be downloaded from the Program's Downloads page on the Internet. This system enables rapid delivery of bug fixes and, occasionally, minor enhancements.

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Geo 18.1 Build 5: Fixes

• The wall bending moments appear incorrect when compared with the DOS version of Greta.
  [NCR 20] (Fixed 26 April 2006)
• Help files seem to be not connected properly to the Help menu button in the application.
  [NCR 23] (Fixed 10 April 2006)
• The Groundwater pressures entered were not being used in the calculation and not even showed in graphical view; only the hydrostatic pressures were being used in the calculations.
  [NCR 24] (Fixed 21 March 2006)
• Ground water data is assumed to be entered in ascending order of levels which is not being done so, and that too in SI units only and not in any other units.
  [NCR 25] (Fixed 21 March 2006)
• The units in the results output seem to be in consistent with the values for the force units being invariably in the KN range even though other units may be requested by the user.
  [NCR 26] (Fixed 5 May 2006)

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Outstanding Bugs

• None are recorded.

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© 2007 Oasys Ltd