1 anders ekholm, architectural and building design methods, school of architecture, lund university...

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Anders Ekholm, Architectural and Building Design Methods, School of Architecture, Lund University

Activity modelling in CAD-programs for building design

A prototype for activity modelling in CAD-programs for building design

Anders Ekholm, LTH

Consultants:Stefan Larsson and Bengt Larsson, Lasercad AB

Balàzs Piri and László Hatvani, Cadprojekt

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From drafting-oriented to object-oriented CAD

• A prerequisite for computer integrated construction and facility management, CIC/FM, processes

• CAD has mainly been used in the later stages of building design • Both activity and building are in focus in early stages • Today’s CAD programs do not support activity information management • Externally generated development may overlook ”tacit” knowledge• Ongoing research: EDM, SEED, BAS•CAAD etc.

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• A toolbox with a selection of objects: wall, slab, window, etc.

• The tool creates a geometry object, e.g. a vertical plate, that may represent walls and barriers.

Today’s CAD-tools

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Additional attributes can be edited through a dialogue window• Attributes, e.g. material, thickness, height, placement och centreline • Presentation, e.g. colour, material, layer

Today’s CAD-tools

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• Architectural programming including activity description is part of the design process

• Design of activities and building are mutually dependent

Problem solving cycle

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• Development of a program prototype for modelling user activities in the context of CAD for building design

• The prototype shall act as a ”testbench” for usefulness analyses• Hopefully, the prototype will generate new ideas

The objectives of this project

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Information about activities in building designInformation about activities in building designActivity information

Activity areas/AktiviteterPersonnel support/Stödverksamhet

Activity relationship informationCommunications/KommunikationMaterial flow/MaterialflödeActivity relationships/Relationer

Resource and result informationProduct and material data/Produkt- och resursinformationRoutings or manufacturing sequence data/Processinformation

Person informationPersonnel data/Personalinformation

Equipment informationFurniture, machinery and equipment data/Möbler, maskiner och utrustning

Building informationBuilding (and process) support/Byggnader och processanläggningar

Hales, L.H. 1984 Computer Aided Facilities Planning

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Conceptual schema for the prototype program ”Activity Add-on”

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Activity design includes the definition of the spatial properties of the activity, e.g. by using a geometry tool in the CAD program

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The hatched area is defined as an activity through a command.Relation to other activities, duration etc., can be determined in a dialogue box

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Schedule Group A+B Group A Group B08.00-08.15 Arrival08.15-08.45 Gathering08.45-09.30 Orienting subjects Science09.30-10.00 Imaging Computers10.00-10.15 Break10.15-11.15 Science Orienting subjects11.15-12.00 Athletics12.00-12.45 Lunch12.45-13.00 Groupwork Groupwork13.00-13.30 Computers Imaging13.30-13.45 Break13.45-14.30 Film/TV Lego/Games14.30-14.35 Leaving

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This example of school layout design shows a floorplan and the activity tree forGroupwork in class A. Time settings show that it starts every monday at 12.45

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Activity modelling in CAD programs for building design

Development possibilities• Activity description: basis for acquisition of premises,

existing or new• Space function programming • Visualisation of activities in buildings • Spatial layout design methods: relation matrices, area- and

volume studies, flow schemas• Analyses of versatility of building spaces: further

development of the Dutch SAR-methods• Activity libraries: Pattern language renewal• Process modelling

1 anders ekholm, architectural and building design methods, school of architecture, lund university...

Documents

building design information

building design methods

building design development

building design anders

activity description

objectoriented cad

context of cad

processes cad