status of precaststatus of precast … concrete bim standards meeting p t w kfl i iti l d t...

Precast Concrete BIM Standards Meeting

P t W kfl I iti l D t tiPrecast Workflow Initial Demonstration

STATUS of PRECASTSTATUS of PRECAST PROJECT BIM EFFORTS in

the US

Chuck Eastman

As presented by the following at the 2011 PCI convention – Salt Lake City, UT

Chuck Eastman

Shiva Aram

Manu Venugopal

Rafael Sacks

Salt Lake City, October, 2011PCI Convention

Rafael Sacks

Ivan Panushev


P t W kfl I iti l D t tiPrecast Workflow Initial Demonstration

ParticipatingParticipating Companies:

• Tekla

• Structureworks

• Vectorworks

Chuck Eastman

• Vectorworks

• Nemetschek – Scia

Chuck Eastman

Shiva Aram

Manu Venugopal

Rafael Sacks

• Solibri IFC Viewer• Nemetschek IFC Viewer


October 25, 2011Rafael Sacks

Ivan Panushev

The Interoperability ChallengeThe Interoperability Challenge

Review of the Precast BIM Standard and its History

Background

Why interoperability is important

Why is it hard?Why is it hard?

The National BIM Standard approach- implementation- procedures- testing and certification

The agenda todayThe agenda today


CPF Projects in InteroperabilityCPF Projects in Interoperability

Major funding

Precast National BIM

Structural Design to Structural Detailing (ATC-75) – 2007 -2008

Georgia Tech Technical Team

Ch k E

Precast National BIM Standard – 2008 --

Precast National BIM Chuck Eastman

Shiva Aram

Manu Venugopal

Precast National BIM Standard – 2011 --

CIS/2 h Manu Venugopal

Rafael Sacks

Ivan Panushev

CIS/2 exchange certification – 2004 --


Ivan PanushevGSA Model Views GSA-002, GSA-006 - 2010

ModelModel‐‐based Data Sharingbased Data Sharing

StructureWorks

Bentley® ProConcrete™ V8iBentley ProConcrete V8i

AllplanStr ct re orksStructureworksPiece Tracker


Importance of InteroperabilityImportance of Interoperability


Building model data is rich and complexBuilding model data is rich and complex

A precast Piece has multiple shapes:A precast Piece has multiple shapes:

Intent

Sh M d lBatter Camber

A bl M d lBatter Shop Model Assembly ModelBatter

Length before tensioning, batter ends, non-cambered

Length after tensioning, batter ends, cambered


Building model data is rich and complexBuilding model data is rich and complex

Shape method – B-rep, CSG solid, extrusion or other sweep

directionpositive_length_measure

clash detection and spatial

subtraction

& length

Boundary representation Polygon faced extrusion

face_surface

and spatial layout

& length

editing and refinement

Different kinds of geometry needed for different purposes


Need for model viewsNeed for model views

Why is there a need Model Views?

precast engineering scheduling precast fabricationExampleUse Cases

IFC, CIS/2 or others Model SchemaSchema

IFC is a rich set of structures covering most information

Highly redundant

Salt Lake City, October, 2011PCI ConventionGeorgia Tech

IFC is a rich set of structures covering most information needed for design, analysis, procurement, fabrication planning and fabrication automation – an ISO standard

Precast Concrete NBIMS ProcessPrecast Concrete NBIMS Process

What is the National BIM Standard?

We are following and validating the national BIM standard process, defined in:

National BIM Standard Version 1 - Part 1: Overview, Principles, and Methodologies

National Institute of Building Science

Draft: January 14, 2008

National Institute of Building ScienceBuildingSMART

Federal Facility CouncilNational Institute of Standards and Technology

Available in:

htt // f ilit i f ti il /bi / bli ti h


http:// www.facilityinformationcouncil.org/bim/publications.php

Overview of NBIMS processOverview of NBIMS process

Scope of Process Phases

Program: What is the requirement?organi e domain e perts in target area- organize domain experts in target area

- determine scope of coverage - define process model of exchanges - specification of exchange requirements by d i t 6 10 M thdomain experts 6-10 Months

Design: How to solve the requirements?- definition of model views as Concepts - mapping required semantics to schema structures - define IFC bindings 6-12 months

Construct: How to build it?Construct: How to build it?- thorough unit testing- verify software implementation - develop test model views for each exchange

6-14 months


6 14 months

Deployment: Use in Industry- field testing ongoing

Time: 18-36 months

Requirements definition – IDM workflows

PCI team identified 28 exchanges

Salt Lake City, October, 2011PCI ConventionDefine relevant exchanges

IDM Exchange Requirements

Exchange Requirements- the information content of exchanges, defined functionally

General Information Attribute sets Attributes/relations Required? Exchange ExchangeGeneral Information categories

Information items within category :

Attribute sets relevant for category

Attributes/relations Required?

Type?

Features?

geometry

relationsattributes

Exchange model 1

Exchange model 2

pieceGrade Beam, Pier g y

Structural

relationsattributes

Placement relations

piece families, reinforcing. analysis model

,Cap, Spread footing, Slab on Grade Structural

loads

Material

model, loads, connections, finishes

Grade, Stem Wall, Retaining wall, Drilled Pier,

PCI Committee specified exchange contents

Connections

Status

Cassion, Pile, Pile Cap


GOAL: to define information requirements in adequate detail to drive implementation

Information Delivery Manual

IDM Exchange Specification

y

1. Process model with exchangewith exchange definitions

2. Exchange requirements

3. Narrative interpretation


Identify IFC equivalent of requirements

IDM Requirements

1 2

IFC information

model

Native information

model

Model View Definition(MVD)

1. Identify the IFC entities that represent the IDM requirements

2. For each application, find the native data entities that


correspond to the IDM requirements and IFC entities3. Implement mappings in one or both directions

Model View Implementation Tools


IFC Concept Specification


IFC Concept Specification

133 Concepts for precast,31 of them are re-used from other MVDsother MVDs


MVD Binding Documents: Assessment

Status of Precast BIM Standard:

Revise implementation to be initiated using IFC 2x3

Model View specification completed in December 2010

Develop test cases, for both import and export, detailing exchange contentsDecember 2010

Was specified in 2x4, to address weak or missing information in

Engage software companies in translator implementation processmissing information in

2x3

2x4 has been delayed multiple times not

p p

Beginning implementation, to get the process started; not a multiple times, not

expected now until 2013

In early 2011

pcomplete project

Constrained by software companies


In early 2011, developed test models, supporting debugging

pimplementation schedules


Workflow Across Multiple Applications forPCI Convention

VectorworksTekla SCIA Part

ARCHITECTURE DETAILINGMANAGEMENT

Tekla Manager

Structureworks

P tStructureworksSCIA

engineerENGINEER

Part Manager

NOTE: Fully editable models cannot be transferred from one diti li ti t th th l d l i i


editing application to another; the rules and logic are unique.


Workflow Across Multiple Applications forPCI Convention

VectorworksTekla SCIA Part

ARCHITECTURE DETAILINGMANAGEMENT

Tekla Manager

Structureworks

P tStructureworksSCIA

engineerENGINEER

Part Manager

Good exchanges have complex content

Of 133 Concepts the demo has shown about 50 of them


Of 133 Concepts, the demo has shown about 50 of them

Expand the base of ParticipantsExpand the base of Participants

StructureWorks

Bentley® ProConcrete™ V8iYou have the most

Bentley ProConcrete V8i influence in the rate of implementation

AllplanS k

p

StructureworksPiece Tracker


Complete the Precast StandardComplete the Precast Standard

Systems (slabs stairs raker beams P-cells tube – what else?)Systems (slabs, stairs, raker beams, P cells, tube what else?)

camber and twist parameters; precast piece properties

connection shape modifications to precast pieces also blockouts – external -connection shape modifications to precast pieces, also blockouts external , Internal connections reveals and other features

metadata and status information, tracking GUIDs

material and mix properties

structural analysis model and its relations to physical pieces

Embeds, lifting hardware and joints

reinforcing and tendons and their properties

architectural pieces with finishes, surface profiles

external library references


joint information

Summary

Technical and Committee Tasks:

Broaden software company participation

Extend set of test models for testing

Work with software companies in their implementation

Develop test suite for certification

Need for a review with committee on technical aspects: P-sets plant managementaspects: P sets, plant management,

Complete work – end of 2012


MVD Binding Documents: Assessment

Status of Precast BIM Standard:

Assessment of Model View BIM Standards:

Model View specification completed in December 2010

Standards:

Time consuming to develop – 18-36 mos.

December 2010

Was specified in 2x4, to address weak or missing information in

Very rigid: good for contractual pass-offs, poor for collaboration

missing information in 2x3

2x4 has been delayed multiple times not

Very much a black-box, content not easily understood by casual usersmultiple times, not

expected now until 2013

In early 2011

users

Testing is onerous; SW companies will be reluctant to support many


In early 2011, developed test models, supporting debugging

reluctant to support many MVDs