bim_conference_2_12_10_rev_3

BIM Who Benefits?Integration between Engineers and Architects

CIBSE Conference 2nd December 2010

http://www.libraryhouse.net/cleantech/2008Cleantech100/

http://www.energyawards.org.uk/

http://www.scottishsoftwareawards.co.uk/awards/

• BIM (Building Information Modelling)

− A process of generating and managing building data during its life

cycle. It uses three-dimensional, real-time, dynamic building

modelling software to increase productivity in building design,

construction and maintenance period.

− “ A model-based technology linked with a database of project

information” according to American Institute of Architects

What is BIM?

• Multiple models into a “composite model”

What is BIM?

Energy

Model

Composite

Model

Architectural

ModelStructural

Model

Electrical

Model

Plumbing

Model

BIM

(linked with phasing,

sequencing,

construction

schedule)

Mechanical

Model

• Graphical information

-3D objects visual in the

model

• Non-graphical

information

- Performance data

• Linked information

- Schedule & cost

informationCost Model

Compliance

Model

Other Model

BIM process- a collaborative process

Building Owner f

ArchitectureContractor

Civil Engineering

Facilities Manager

Construction

Manager

Electrical Engineer

Mechanical EngineerBIM f

Integrated Design Process

Conventional design process

Building design process

Master

Planning

Concept

Design

Schematic

Design

Detailed

Design

Completion In use

Performance analysis

tool

Contractors,

construction manager,

commissioning

authority, cost

estimator

Mechanical,

electrical, & civil

engineers

Mainly architect ,

structural engineer &

clients

Planning staff,

clients

community member

Architect & clients

A linear design process

Users

Conventional design process

Construction

Tender documentation

Detailed Design

Schematic Design

Concept Design

Consultation

& Engagement

Project start

completion

ConstructionConstruction

Documents

Detailed

Design

Schematic

Design

Time

Eff

ort

Integrated design process


Traditional

Eff

ort

Time

Construction

Documents

Detailed

Design

Schematic

Design

Construction

Key elements of integrated design process

• Inter-disciplinary collaboration between architects,

engineers, cost consultants and facility managers

from the beginning of the design process

• Discussion of the various important performance

issues and the establishment of a consensus on this

matter between client and designers

• Budget restrictions applied at the whole building

level, with no strict separation of budgets for

individual building systems.

• Involvement of specialists (e.g. energy engineering,

energy simulation, daylighting, comfort)

• Data sharing

• Clear articulation of performance targets and

strategies, to be updated throughout the process by

the design team

• Documentation and transparency of design

decisions

Integrated design process

Building

de

sig

n

A multi-

disciplinary

design

team

Concept design

Completion

process

Building

Conceptual

modelling

Predictive/incentive

modellingCompliance

modelling

A multi-disciplinary design

team

•Landscape architect

•Ecologist

•Architect

•Energy specialist

•Structural engineering

•Civil engineering

•Mechanical engineer

•Electrical engineer

•Plumbing engineer

•Other specialists(fire, acoustics,

daylighting, controls, etc.)

•Facility manager

•Contractor

•Construction manager

•Cost estimator



Master

Planning

Concept

Design

Schematic

Design

Detailed

Design

Completion In use

Climate

Locality

Site features

Nat resources

Urban form

Urban solar

Urban light

Visualise

Brief consequences

Building type

Climate & bldg type

Building form

Footprint headlines

Headline design

directions

Headline

sustainability

directions

Visualise

Baseline solution

Baseline outcomes

Footprint

Scheme directions

Building solar

Building light

Renewable directions

Sustainability

directions

Basic loads

Compliance

directions

Visualise

Brief refinement

Detail definitions

Systems

HVAC

Air flows

Building detail

feature design

Loads – steady state

Energy – dynamic

Plant size

Optimisation

Energy compliance

Sustainability

compliance

Certification

CFD etc studies

Visualise

Certification

Energy in use

Re-certification

Controls

Re-furbish & improve

Integrated approach to project delivery

<Virtual Environment> model

of the Scottish Parliament

Building

Project location: Glasgow

Master planning

What if climate

change?

2050?


<Virtual Environment> model

of the Scottish Parliament

Building

Concept design

Sketch model

VE model

VE models with different glazing percentage


Schematic design

VE model

with 20%

glazing Suncast

EPC

Thermal result

Radiance

MacroFlo

Apache System


Detailed design

CFD

HVAC Cost Plan

Suncast

Simulex

EPC

Radiance

Model Merge

Original Model

Room Data

New Model

Room Data

• Changes to Imported Geometry are Updated in <VE> Model

Without Overwriting Input Data

• Autodesk Revit Architecture 2008, 2009, 2010, 2011

• Autodesk Revit MEP 2008, 2009, 2010, 2011

• ArchiCAD via gbXML

•Microstation, Allplan via gbMXL

•Google Sketchup 6 & 7

• Google Sketchup Pro 6 & 7

The benefits….

…don‟t have to rebuild geometry to run analysis

…the potential to change the dialog between architects and engineers

What software does IES work with?

Graphisoft ArchiCAD gbXML

Other gbXML

http://www.designandcad.com/3d-visualization-gallery.html

IES VE: Autodesk Revit Plug-in Updates

gb

XM

L<

VE

>

How it works:

1. Draw Geometry in Autodesk Revit

2. From the Revit Toolbar:

• Set Building Location

• Define Building Parameters:

• Building Type• Construction Materials• Building System Types• Room Types

3. Launch IES VE-Toolkits/VE-Pro

4. Choose Analysis Type

gbXML Hierarchy

Adjacencies

Adjacencies

We spoke about the importance

of „rooms‟. Within Revit, you can

define a wall to be an exterior

wall, but this will mean nothing

when it comes to the gbXML

translation. The only way a wall

is recognized as an exterior vs

an interior wall is by their

adjacencies.

So for an element to be defined

as ground floor slab, it is a

horizontal surface adjacent to a

room (otherwise it is a shading

device) that is not in contact with

any room below. For a floor, it‟s

a horizontal surface that is in

contact with a room above and

below. For a roof, it‟s a

horizontal surface that is not in

contact with any room above.

Exterior walls are vertical

surface that is not in contact with

an adjacent room on one side

Adjacencies

Keep It Simple

Keep your geometry as simple as possible!

• Is this geometry absolutely necessary for the type of analysis I am

running?

• Can I eliminate anything from my model? (Purge unused, etc)

• There are often thousands of shading surfaces in a Revit file. If you are

doing a daylight analysis, are the 4 cm mullions going to affect the

outcome? They will affect the runtime significantly.

Basic Modelling - Columns

Basic Modelling – Problem Wall Conditions

Basic Modelling – Problem Wall Conditions

Basic Modelling – Shading Elements

Basic Modelling – Openings

IES VE: gbXML “Healing Tools”

<Virtual Environment> Software Suite Integrated sustainable building design analysis toolsDr Sarah Graham ([email protected])

http://www.libraryhouse.net/cleantech/2008Cleantech100/

http://www.energyawards.org.uk/

http://www.scottishsoftwareawards.co.uk/awards/

Integrated sustainable design approach

In useMaster

Planning

Concept

Design

Schematic

Design

Detailed

Design

Completion

• Design team interoperability throughout the entire design process

− Each tier provides tailored access to specific types of analysis at each building design stage


VE Ware

VE Toolkits

VE Gaia

VE Pro

VE Ware

VE Toolkits

Integrated sustainable building design toolDesign team interoperability throughout the entire design process Architects design for sustainability using same underlying calculations as Engineer

Architects use early design stage tools; Engineers use detail design stage tools

Impacts shared and understood by entire design team

Climate & change

Bio-climate

Urban analysis

Site analysis

Built form

Building analysis

Compliance

LEED, BREEAM etc

Operation

The Gaia Bioclimate

Tool takes it further ...

Urban design

Macro issues

Built form

And further still ...

Layout

Construction

Shading

Ventilation

Measures

Bioclimate

Climate Change

VE-Gaia: Concise ReportingAutomated reportage & guidance tool Get to data fast; macros speed retrieval of the most important results

Interactive reporting allows “problem-issues” to be highlighted

Guidance within the reportage avoids abortive work

how valuable is the available solar, wind and rain resource

it is about initially getting a feel for the numbers involved how big an impact natural resources can realistically make

Skin or internal gain dominated? Appropriate for passive strategies?

Number of spaces close to an open-able window?Key metrics – glazed area, dominant glazed orientation




Water usage calculation% Impact of water usage reduction:

black / grey / rain waterlow flush etc




early stage renewables feasibilitywhich renewable works best

rank appropriateness




VE-Pro example output

SunCast: Solar penetration

ApacheSim: Colour-coded results

VE-Pro capabilityEnergy Modeling

Passive design / natural ventilation / mixed mode

Detailed HVAC control / LZCT / Energy Performance Certification

ApacheSim: Natural ventilation visualisation

Overheating analysis: CIBSE Guide A; HTM 03-01; BB 101Energy/Carbon usage: simple COP / detailed HVACNatural ventilation design & feasibilityRenewables (LZCT) assessment

VE-Pro example output

ApacheHVAC: Detailed HVAC simulation

VE-Ware / VE-Pro: EPC

VE-Pro capabilityEnergy Modeling

Passive design / natural ventilation / mixed mode

Detailed HVAC control / LZCT / Energy Performance Certification

bim_conference_2_12_10_rev_3

Documents

design process discussion

design team documentation

bim building information

building data

building level

individual building

cost estimatormechanical

energy simulation