Analysis and Design of DuPont’s Steel Framing Systems Using WinSCADS and GT STRUDL

Jeffery A. Stokes, PEE.I. Du Pont De Nemours and Company

20th Annual Users Group Meeting & Training Seminar

June 23 - 26Las Vegas, NV

Magdy S. Roufaiel, PhD, PERoufaiel Associates Int’l, Inc.

WinSCADS General Overview

WinSCADS is DuPont’s 3D structural modeling tool used to automate structural steel design process.

Structural Computer Aided Design System

Presentation Outline

WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation. Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process

Presentation Outline

WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation. Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process.

WinSCADS General Overview (Cont.)

1970s – DuPont FRAME Program.

1980s – SCADS - VAX system using CRAY NASTRAN for analysis..

1990s – PC-SCADS, a DOS version (GT-STRUDL, PD-STRUDL, and STAAD).

1998 – WinSCADS - Windows-based version was released (Microstation-based graphics for model display).

2004 to date – User interface has been redeveloped to utilize OpenGL for graphics and to improve user interaction with the system.

Historical Background

WinSCADS General Overview (Cont.)

Hundreds of DuPont buildings have been designed by the system and the data has been saved on our CES server.

When modifications or additions are made to buildings, we are able to utilize the existing models since compatibilities have been maintained over the years

May build the “same” Facility at another US site or overseas. Design loads may change (wind or seismic)

Historical Background (Cont.)

WinSCADS utilizes GT STRUDL for the structural analysis tasks of the system. As structural steel model evolves the information is uploaded as necessary to the

3D Plant Design system (PDMS). Final design model is transferred to SDS2 or X-Steel for electronic detailing.

WinSCADS General Overview

DRAFTING

UPDATE CONSTRUCTION APPLICATIONS

DETAILING

PDMS

REFINER

ADD-SIZE

FOUNDATION

CONNECTIONS

DISPLACEMENT

MODEL GENERATION

STATIC ANALYSIS

STEEL CODE CHECK

GRAPHICAL REVIEWANALYSIS MODEL

CONSTRUCTION MODELANALYSIS RESULTSDESIGN RESULTS

REPORTS GENERATION

GEOMETRY, LOADINGS,MASS, USER-TABLES

FREQUENCY ANALYSIS

User Interface

WinSCADS General Overview (Cont.)

Model Generation – Geometry & Loading

Model Generation – Geometry & Loading

User Interface

WinSCADS General Overview (Cont.)

Model Generation – Static & Frequency

Model Generation – Static & Frequency

WinSCADS General Overview (Cont.)

Model Generation – User-defined Steel Table

Model Generation – User-defined Steel Table

User Interface

User Interface

WinSCADS General Overview (Cont.)

Graphical ViewGraphical View

WinSCADS General Overview (Cont.)

Select the elements, floors or elevations to view

Presentation Outline

WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation. Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process.

WinSCADS Data Model

WinSCADS model generation uses a system of floor elevations, intersecting column lines, bay widths, center lines of equipment, and other geometric object.

Process is analogous to laying out an engineering drawings, familiar to engineers and designers working with the chemical and industrial facilities.

The model is built floor by floor with the system automatically bringing the columns up to each level to create a 3D model.

WinSCADS Data Model (Cont.)

Common elements like vertical bracing, floor openings and equipment supports are automated.

Beams are generated as physical members rather than

a series of analysis members.

First cut steel sizes based on the gravity loading are generated automatically and added to the database.

WinSCADS Data Model (Cont.)

There is a multitude of default values assigned to types of members to save time. Fixed ends for beams framing into columns Pinned ends for interior framing K-factors for columns and bracing Assigned UBL values look not just a member

framing in but also direction. Others …

Internally, WinSCADS generates database tables to store and manipulate all the input and output data.

WinSCADS Data Model (Cont.)

WinSCADS model generation uses a system of floor elevations

WinSCADS Data Model (Cont.)

…. and intersecting column lines and bay widths

WinSCADS Data Model (Cont.)

The model is built up floor by floor with the system automatically bringing the columns up to each level to create a 3D model

WinSCADS Data Model (Cont.)

Next Floor ……

WinSCADS Data Model (Cont.)

Physical (Construction) Model

Specified Loads

Analysis ModelAnalysis Loads

WinSCADS Data Model (Cont.)

Major Components of WinSCADS Internal Database Model

Building Control

Parameters

User-defined System Settings

User-defined Building Settings

Floors X-Column Lines

Y-Column Lines

Blocks X-Bents

Y-Bents

Beams Columns

Gravity Loads

Uniform Wind/Seismic Loads

Equipment Openings

Horizontal Loads

Point/Line Wind/Seismic Loads

Diaphragms

Q-Joints Mass

Grid Points Load Cases

Load Combinations

Frame Elements Plate Elements

System Steel Tables

User-defined Steel Tables

Static Results Frequency Results

Code-Check Results

WinSCADS Data Model (Cont.)

WinSCADS Built-in Analysis/Design Capabilities

ANALYSIS

Static – Linear & P-Delta

Frequency Analysis

Response Spectrum

DESIGN CODES

ASD9 LRFD

ASD8 CISC

BSI NEN

I/O UNITS

ENGLISH

METRIC

SI

STEEL TABLES

STEEL SECTIONS

W WB WC

C, WT

L, SL, LL

TS, SP

S1, S2, S3

Presentation Outline WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation.

Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process.

Automation of GT STRUDL input-data preparation

Prepare GT STRUDL Input …

Automation of GT STRUDL input-data preparation (cont.)

View GT STRUDL Input …

Running GT STRUDL from within WinSCADS

Execute an Analysis/Design Cycle …

Previewing results using GT STRUDL

Previewing results using GT STRUDL (cont.)

Previewing results using GT STRUDL (cont.)

Transferring results from GT STRUDL to WinSCADS

Transferring results from GT STRUDL to WinSCADS (Cont.)

Translates GT STRUDL DBX files to WinSCADS Format

Previewing results using WinSCADS

Previewing results using WinSCADS (Cont.)

Previewing results using WinSCADS (Cont.)

Previewing results using WinSCADS (Cont.)

Previewing results using WinSCADS (Cont.)

Previewing results using WinSCADS (Cont.)

Design data

Natural frequency and mode shapes analysis

Natural frequency and mode shapes analysis (cont.)

Natural frequency and mode shapes analysis (cont.)

Natural frequency and mode shapes analysis (cont.)

Natural frequency and mode shapes analysis (cont.)

Presentation Outline

WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation. Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process.

WinSCADS Interface with Other Systems

DRAFTING

UPDATE CONSTRUCTION APPLICATIONS

DETAILING

PDMS

REFINER

ADD-SIZE

FOUNDATION

CONNECTIONS

DISPLACEMENT

MODEL GENERATION

STATIC ANALYSIS

STEEL CODE CHECK

GRAPHICAL REVIEWANALYSIS MODEL

CONSTRUCTION MODELANALYSIS RESULTSDESIGN RESULTS

REPORTS GENERATION

GEOMETRY, LOADINGS,MASS, USER-TABLES

FREQUENCY ANALYSIS

WinSCADS Interface with Other Systems (Cont.)

WinSCADS Interface with Other Systems (Cont.)

WinSCADS Interface with Other Systems (Cont.)

DRAFTING

WinSCADS Interface with Other Systems (Cont.)

DRAFTING

WinSCADS Interface with Other Systems (Cont.)

DRAFTING

WinSCADS Interface with Other Systems (Cont.)

DRAFTING

WinSCADS Interface with Other Systems (Cont.)

PDMS

WinSCADS Interface with Other Systems (Cont.)

DETAILING

Presentation Outline

WinSCADS General Overview. WinSCADS Data Model. WinSCADS-GT STRUDL Interface.

Automation of GT STRUDL input-data preparation. Running GT STRUDL from within WinSCADS. Previewing results using GT STRUDL. Transferring results from GT STRUDL to

WinSCADS. Previewing results using WinSCADS. Natural frequency and mode shapes analysis.

WinSCADS Interface with Other Systems. The Design Process.

The Design Process

WinSCADS “Working” model ….

New portions of structure added

Floor elevation changes, infill steel revised, etc, changes & changes

The Design Process (cont.)

PDMS model needs to be updated continually as the design progresses

Model viewed from WinSCADS

Model viewed from GTStrudl

Changes are automatically included in the GTStrudl Model since the analysis model is regenerated each time

The Design Process (cont.)

Microstation Design Drawings are generated and updated

until Construction Release quality

The Design Process (cont.)

The Design Process (cont.)

Update PDMS, Drawings, SDS2

Or individually

Drawings & SDS2 Model are transferred to detailing firm to create erection drawings via SDS2

The Design Process (cont.)

From which they create connection details via SDS2

The Design Process (cont.)

Steel is fabricated and sent to the field for erection

The Design Process (cont.)

And finally to project completion. Via WinSCADS + GTStrudl, Microstation, PDMS and SDS2

The Design Process (cont.)

Presentation

Thank you

Questions