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MWX | Masonry Design | Update Information


Version 02/17


Addition

The material database for the products of Schlagmann Poroton GmbH & Co. KG has been updated.


Version 01/17


Correction

The internal force graphs for the output document are scaled correctly now.


Version 02/16


Addition

Divergent wall thicknesses can be entered flush with the outer surface.
ÖNORM EN 1996: For partially superted ceilings the rules from the German Annex can be applied.
The material databas for the products of "Wienerberger GmbH" and the "Schlagmann Poroton GmbH & Co. KG" are updated.


Version 01/16


Addition

Wall overhang: An overhang beyond the edge of a plate or strip foundation can be defined. The design is done like for partial supported slabs according to DIN EN 1996.
Data exchange: Loads and wall geometry can be transfered to foundation programs FDS+ and FDR+.
Graphics: Better visualization of the mechanical system depending on the support conditions.


Version 02/15


Eurocodes

With the selection of DIN EN 1996:2015 new adjustments for the National Annex (A1 + A2) Part 1-1 and Part 3 are implemented. Main adjustments are the correction for compressive strength of masonry recipe.

Material update

The material database with material parameters for Germany has been updated according to the product approvals 2015.


Version 01/15


Internal

Technical adjustment


Version 01/14C


Material selection updated

The material selection form for masonry based on technical approvals and user definied masonry acc. to DIN 1053 and DIN EN 1996 have been updated. The form for approval based masonry now shows substantially more values for mechanical properties definied in the specific approval as well as verbal hints from the approval.

In case of user defined material a greater selection of derived mechanical properties (e.g. unit weight based on selected bulk density class) are shown.

When defining a standard material acc. to EN 1996 it can now be specified that perpend joints parallel to the wall face shall be assumed. This automatically toggles the neccessary reductions of the masonry compressive strength.


Version 01/14A


Corrections

The design option "plate/shear actions via reduction factors" war also visible for DIN 1053-1, where this design code does not support the reduction factor approach.

Extension of product database

For DIN 1053 and DIN EN 1996 the product database now also contains all products of Schlagmann and HART Keramik.


Version 01/14


Updated material database from Wienberger

The material database has been updated by Wienerberger Germany GmbH in order to include the design values of the material properties for their latest products as well as to provide them for the newly introduced National Annex to Eurocode 6 for Germany.

New: Centering bars at the top of the walls

The property sheet as well as graphic context menu for walls (right click on wall in graphics view) now offer the option to specify centering bars and thus to enforce a perfectly centric load application at the top of the wall.
Using the general design method the bending moments due to the floor slab deflection will entirely be introduced into the bottom of wall above. Thus it is important to also define (possibly present) centering bars in walls underneath in order to not underestimate the wall moments. In most cases the introduction of centering bars increases the vertical bearing capacity of a wall; however it will decrease its resistance to lateral loads (e.g. wind and earth pressure perpendicular to the wall), since no fixed end moment can be activated at the top of the wall.
In the simplified design method the definition of centering bars only increase the bearing capacity at the top of the wall. Any other design locations remain unaffected.

New: Eurocode 6 for Germany

Walls can now be designed according to DIN EN 1996 (general and simplified design methods). Background information to the changes in comparison to DIN 1053-1/-100 can be found in Frilo-Magazin 2012 (download available from www.frilo.eu/de/service/publikationen/frilo-magazin.html).

The following facts are worth mentioning:
- partially supported floor slabs are now an integral part of all design checks; this commonly reduces the load bearing capacity
- if partially supported floor slabs are present the resistance to lateral loads exhibits an significant dependency on the load direction; wind pressure is more favorable than wind suction
- due to a reformulation of the set back rule for load eccentricities at the top and the bottom of the wall utilization ratios of 1.0 do not indicate the load bearing limit; only utilization ratios > 1.0 indicate immanent wall failures


Version 02/11E


Correction

For walls supported at the top and the bottom only the effective length was not conservatively estimated if the following conditions were

met: DIN 1053-100, general design method, wall thickness min. 36.5 cm and floor slab supporting length less than half the wall thickness.


Version 02/11C


Internal modifications

Only internal modifications and adoptions were conducted.


Version 02/11B


Corrections

Since version 02/11 it was not possible to increase the width of the input area on the left side on the screen by dragging. Additionally when using the output profile "short" the system was not shown in the frontal view.


Version 02/11A


Visibility of utilisation ratio panel

The utilisation ratio table at the right screen border is now by default not visible. Its visibility can

now be toggled via the F12-key on the keyboard or the newly added eta-button in the main toolbar.


Version 02/11


Additional system views in the output documents

Optionally a side view and an isometric view of the loaded system can be added to the output document (see

output menu).

Restructuring of floor load definition

The definition of reaction factors has been simplified. Now prior to the definiton of any load value the

user has to choose between automatic calculation of the reaction factors, manual definition of the

reactions factors or the prescribtion of reaction forces. This input scheme should prove to be less error

prone compared to the former defintion procedure.

Editable input values in text result view

The numerical values of many input value can now be edited directly in teh textual result view (shaded in

grey, e.g. wall thickness, load values).

Extension of shear loads (bracing loads) by axial load components

The possiblility to enter axial force components in the shear load (bracing load) definition, which can

occur if the shear walls are not located centrially in the building (in the direction of the loading) has

been added.

Extended context menues for graphical objects

Every graphical object (walls, floor slabs, loads, supports) now have got a context menu (accessible by

right click) which gives access to many common tasks like for instance the insertion of new loads, the

removal of loads etc.

Editable load and dimension lables in graphic view

Every numerical input data shown in the graphic view can now be modified interactively by left-clicking on

it. Thus the navigation to the respective data sheet in the menu tree can be omitted.

Graphical display of load dispersion areas underneath vertical loads

In order to identify differently loaded wall areas more easily a graphical hint of the load dispersion

areas underneath vertical loads of type concentrated load, block load and trapezoidal load has been added.

Unification of graphical representation with MWK, MWP and MWM

With respect to MWK (basement wall), MWP (masonry column) and MWM (multistorey masonry walls) the

graphical display has been modified in order to similiar in all masonry applications.


Version 03/10C


Bug fix

When design according to EN 1996-1-1 and the program option "floor loads -> assume acting simultaneously" was chosen, in case of the presence of a second floor slab the axial wall forces due to the variable portions of the floor loads was overestimated. This error leads to conservative results.


Version 03/10B


Enhanced Performance

Due to an optimized algorithm for the internal creation of load cases the analysis and design could be speed up significantly in case of many vertical wall loads (eg. when designing a wall by export from the Frilo Building Model). Additionally a progress bar informs about the status of a running analysis.

Correction in load combinations

A bug has been fixed, which caused the loss of one half of the load value in the design of singel-story outer walls in the are case when only one single live load on the floor slab represented the entire loading of the system. Only design check according to the general design method of DIN 1053-100 were affected.

Product database extention

All products of the Porotherm-series by Wienerberger Austria have been inserted into our product database. These also ncludes the new Porotherm.dryfix-System where a PUR-based adhesive is used instead of common mortar. Only availible in design according to EN 1996, NA Austria.


Version 03/10A


Correction of floor slab thickness in graphical output

This update solves an issue, where under certain circumstances a wrong value of the thickness of single sided floor slabs was used in the graphical output window. The correctness of the analysis was not affected.


Version 03/10


User defined material for EC6

In addition to the EN 1996-1-1 material dialog it is now also possible to manually specify all strength parameters. The form is located in a new tab of the material dialog.

Error messages included in text output

In case of errors during the analysis (e.g. load eccentricities exceeding wall boundaries etc) the error messages displayed on screen are now also included in the text output.

Load transfer to MWX and MWK

With the new features of load forwarding an MWX-position can now be transformed into an MWK-Position, or its loads can be transferred to a new MWX or MWK position which is located directly underneath the currently designed wall. As far as possible the geometry and material definitions are transferred as well. Load spreading is taken into account for concentrated and block loads, floor loads are either inserted unmodified (in case there is a floor slab defined underneath the currently designed wall) or as vertical wall loads into the new position.


Version 01/10A


Correction of load combination for EN1996

In the analysis of the accidental design situtation (incl. earth quake) all accidental and earth quake loads were assumed to act together instead of individually. Additionally, in the earth quake design situation the combination factor Psi1 was used instead of Psi2.


Version 01/10


Improved data import from Frilo Building Model GEO

The data import from the Frilo Building Model GEO has been improved with respect to system and load definitions. Similar to the data import in SC7 it is now to possible to select several adjacent wall piers (with identical geometrical properties) and import them as one single position into MWX. Thus stepwise constant load distribution along the length of the wall can be accounted for (for instance in case of non-constant floor slab reactions).

Treatment of trapezoidal wall loads

All trapezoidal wall loads with the same action are now assumed to act simultaneously. Thus the main application of this load type - the simulation of non-constant floor slab reactions along the length of the wall - is met in a more realistic way. At the same time the computational efficiency is improved. This change only effects the design of the wall in case of shear walls (reduced inplane-eccentricity) and walls subjected to vertical load when inplane-eccentricities are to be included in the design checks.


Version 03/09B


Correction of effective length

Under certain circumstances the effective length of walls supported only at the top and the bottom was evaluated incorrectly. This has been fixed with version 03/09B.


Version 03/09


Context menus in interactive graphics

Right-clicking walls or floor slabs now allows you to copy material, geometrical or load definitions from other walls or floor slabs. This procedure helps to significantly reduce the input efforts when dealing with regular systems or when using the exporting function out of Building Model Programm (GEO).

Implementation of National Annexes to ÖNORM EN 1996

The implementation of the National Annexes to EN 1996 for Austria have been updated to
- ÖNORM B 1996-1-1, Release 2009-03-01
- ÖNORM B 1996-3, Release 2009-03-01

Extended definition of concentrated loads

The specification of concentrated loads has been extended by the bearing depth, e.g. the length of the load along the thickness of the wall.

Introduction of coherence groups and exclusion groups

Shear loads can now be assigned to coherence groups (all loads belonging to one coherence group are assumed to always act simultaneously) and exclusion groups (all loads belonging to one exclusion group are assumed to never act simultaneously).

Unloaded wall regions

It is now permitted to have unloaded wall regions (e.g. block loads not acting along the entire length of the wall) – without the necessity of specifying a negligible continuous load to prevent numerical instabilities.

Changed definition of shear loads

In previous program versions the bending action of shear loads was defined by a lever arm. This has been changed to the direct definition of bending moments acting at the top of the wall. In this context the total height of the shear wall, as needed in the calculation of the shear stress distribution factor (DIN 1053-1 and DIN 1053-100 only), is no longer derived from the lever arms of the defined shear loads but has to be explicitly entered by the user (part of wall definition).

Extension of vertical wall load types

Introduced in this program version are the vertical load types block load and trapezoidal load. These load types allow the consideration of eccentrically acting vertical loads (in plane). Contrary to concentrated loads these load types are included in the capacity checks at the top of the wall. Please keep in mind that no lead spreading is assume underneath trapezoidal loads! Block loads do not have this limitation (see handbook).


Version 02/09


Extension of the proofs under seismic stresses

With presence of seismic impacts now the additional regulations for brick-work according to DIN 4149 and/or EN 1998-1 are considered

Additional options for calculation

According to EN 1996-1-1, exp. 2.4.2 (1) the effect combinations must correspond to the general rules of EN 1990. In note 2 to this paragraph however, it is referred to the possibility that in usual housing and office buildings the variable loads may be regarded after EN 1991-1-1 acting as simultaneous loads on a ceiling or not acting. A new introduced option allows the decicion whether the live loads on all ceilings act field by field or simultaneous.


Version 01/09


First program version

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