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FRILO Software GmbH - Applications for structural calculation and design

Product details www.frilo.com As of: 29/01/2014

MWM

Multi-storey Masonry Wall

The MWM application performsstructural safety analyses for wall

systems extending over several

storeys (including the basement if

any). The walls consist ofunreinforced, artificial brickwork.

The use of MWM is particularly

recommended for regular wallsystems consisting of several walls

on top of each other.

The calculation is performed in

accordance with the simplifiedmethod if the applications limits

are complied with. Otherwise, amore accurate calculation method

is used and the analysis isperformed in accordance with

masonry standards based on thepartial safety concept.

Bases of design

The design for masonry can bebased on the following standards

 DIN 1053-100:2007-09

 EN 1996-1-1 (more accuratecalculation method)

 EN 1996-3 (simplified

calculation method)

as desired, in combination with

the national annexes for

 Germany Austria

 UK

Calculation of the lateral earth

pressure

The calculation of the lateral earth

pressure is performed inaccordance with the theory of

Coulomb and takes optionally thefollowing national stipulations into

account

 DIN EN 1997-1 / NA

 ÖNORM B 1997-1

 NA to BS EN 1997-1

The calculation of the earthpressure can be based on

simplified assumptions forhomogeneous soil types.

Types of masonry

The user can choose between

prescribed masonry, masonrysubject to approval (approval

database) or user-defined materialfor the analysis. In combination

with DIN/ÖNORM EN 1996 Wie-nerberger/POROTON products are

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also avaiable.

In combination with EN 1996, the

material parameters have to beentered according to therespective national stipulations.

Safety concept

The design according to DIN 1053-

100 is based on the partial safetyconcept defined in DIN 1055-100.

The general requirementsconcerning load-bearing

structures as defined by EN 1990form the basis of the calculation in

accordance with EN 1996.

System

In addition to an individual wall,the structural system of basement

walls for the calculation can beselected. In this case, it is alwaysassumed that the wall to be

verified is covered on its total topsurface by a solid floor slab and

supports it.

Actions

In addition to earth pressureresulting from lateral earthfill, the

wall to be verified can be exposedto

 uniformly distributed verticalwall loads from storeys above

  linearly variable vertical distribu-ted loads from storeys above

 vertical concentrated bearingloads at the top of the walls

 vertical floor loads

Combinations of actions

MWM automatically generates

the appropriate load cases andload case combinations,

depending on the defined actions,and performs the necessary

analyses, whereby the decisiveload case combination is

determined for each individualdesign check.

Design

The design is performed in the

form of a structural safety analysisfor the defined system in

accordance with design code se-lected by the user. When applying

the simplified verification method,MWM checks the compliance with

the limits of application. If theselimits cannot be met, the more

accurate verification method isavailable as an alternative.

Analysis procedure

Depending on the selected designcode and the defined loads, the

following design checks are

performed: compressive strength

 out-of-plane shear capacity

 eccentricity of vertical loads (notnecessary with EN 1996)

The underlying load combinationsare indicated.

Output

Comprehensive adjustment opti-

ons allow a detailed control of the

analyses and the output of sys-tem, load and result values.

Load transfer

The characteristic values of

bearing forces can optionally betransferred to the strip foundation

application FDS or the edge stripfoundation application FDR. Indi-

vidual walls can be transferredtogether with their loading to the

masonry application MWX (gene-ral masonry analysis) in order to

perform – if required – requiredadditional analyses (e.g., in-plane

shear analysis for bracing walls).Entire walls can also be exported

to the basement wall applicationMWK in order to examine more

complex subsoil conditions andloading situations.