Top Banner
Presenter: Matt Brown, P.E. RISA Webinar Plate Design in RISA3D
15

Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Mar 29, 2018

Download

Documents

doanthu
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Page 1: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Presenter: Matt Brown, P.E.

RISA Webinar

Plate Design in RISA‐3D

Page 2: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

PROGRAM

RISA‐3D 9.1.1

Page 3: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Today’s Topics

• Plate Connectivity

• Shape Limitations

• Submeshing and Accuracy

• Interpreting Results

• Common Uses and Modeling

OVERVIEW

Page 4: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

• Plates are not physical members

• Plates only connect to plates, members, nodes, etc at their corners.

• If a node falls along a plate’s edge or interior it is not connected to that plate.

PLATE CONNECTIVITY

Page 5: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Node N4 falls along the edge of the bottom plate. Notice how a “tear” forms

PLATE CONNECTIVITY

Page 6: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Submesh the bottom plate so that every plate’s corner connects to another corner

PLATE CONNECTIVITY

Page 7: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

L/W should not exceed 9.0

t/W should not exceed 3.0

SHAPE LIMITATIONS

Page 8: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

L/W ratio = 9

Lateral Deflection = 2.0”

SHAPE LIMITATIONS

L/W ratio = 3

Lateral Deflection = 3.0”

Page 9: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

t/W ratio = 3vs

8‐Node Solid Element

SHAPE LIMITATIONS

Solid Elements are more accurate than thick plates

Page 10: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Good Plate

Relatively Rectangular

SHAPE LIMITATIONS

Bad Plate

Interior Angle Exceeds 155 Degrees

Ugly Plate

Bowtie Configuration

Page 11: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Plates only exhibit shear deflection (not flexural)

In other words, a plate’s edge cannot curve

SUBMESHING AND ACCURACY

Page 12: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

INTERPETING RESULTS

X Y

Z

Fx

Fx Fy

Fy

FxyFxy Qx Qx

Qy

Qy

Page 13: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

INTERPETING RESULTS

X Y

Z

MxMy

Mxy

Page 14: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Presenter: Matt Brown, P.E.

Additional Resources

RISA‐3D Help File / Manual

www.risanews.com

Page 15: Plate Design in RISA 3D · PDF filePlate Design in RISA ... connected to that plate. PLATE CONNECTIVITY. Node N4 falls along the edge of the

Thank you for Attending!

Questions?Please let us know if you have questions.

We will answer as many questions as time permits during the webinar.

Once the webinar is closed, we will post all Q&A’s, as well as the Quick Reference Guide, to our website: www.risa.com

For further information, contact us at: [email protected]