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RISA Webinar RISA Webinar Foundation Design including Foundation Design including Retaining Walls Retaining Walls Retaining Walls Retaining Walls Presenter: Presenter: Deborah Penko, P.E. Deborah Penko, P.E.

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Page 1: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

RISA WebinarRISA Webinar

Foundation Design including Foundation Design including Retaining WallsRetaining WallsRetaining WallsRetaining Walls

Presenter:Presenter: Deborah Penko, P.E.Deborah Penko, P.E.

Page 2: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Ver. 4.0

Ver 10 0Ver. 10.0

Ver. 6.0

RISA PROGRAMSRISA PROGRAMS

New Features in RISAFoundation

•Retaining Walls

• New CodesNew Codes

ACI 318‐11 concrete designCanadian design code: CSA 23.3‐2004Saudi design code: SBC 304‐2007

• Optimize footings for Uplift, Overturning & Sliding

OVERVIEWOVERVIEW

NEW! Retaining Walls

• Soil Loading & Exterior loads

• Cantilever or Supported walls

• Stem Wall & Footing Wall design

• Overturning & Sliding ChecksOverturning & Sliding Checks

• Loading Diagram

A i l Sh & M Di• Axial, Shear & Moment Diagrams

• Reinforcement design

Retaining WallsRetaining Walls

Page 5: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Enter the Coefficient of Internal Friction fand Backfill angle Θ

K will be calculated for you

Based on Rankine theoryBased on Rankine theory

Soil PressureSoil Pressure

Page 6: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Input Calculated loads

DL Dead Load‐Weight of Concrete & SoilDL Dead Load Weight of Concrete & Soil

LL Live Load‐ Surcharge

HL Hydrostatic Loads‐ Any lateral pressure & hydrostatic loadsHL Hydrostatic Loads Any lateral pressure & hydrostatic loads

Loading Retaining WallsLoading Retaining Walls

Page 7: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Modeling loads on Retaining walls

Draw loads to the centerline of the wallPoint Loads and Line LoadsLoads are applied to the top of the walloads are applied to the top of the wall

Loading Retaining WallsLoading Retaining Walls

Page 8: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Overturning

ResultsResults

Retaining WallsRetaining Walls

Page 9: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Sliding

Retaining WallsRetaining Walls

Page 10: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Shear Check‐ Concrete

Propped wall

Cantilever wall

ACI 318 equation:

Retaining WallsRetaining Walls

Page 11: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Shear Friction Check

μ = 1.0*λ Roughμ = 0.6*λ Smooth

Retaining WallsRetaining Walls

Page 12: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Retaining Wall Footing Checks

• Maximum Soil PressureMaximum Soil Pressure

• Flexural Design

• Shear Checks

Retaining WallsRetaining Walls

Page 13: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Let’s see Retaining walls in action!

Retaining WallsRetaining Walls

Page 14: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Additional ResourcesAdditional ResourcesRelease Notes

www.risanews.com

support@risa [email protected]

User’s Guides available at www.risa.com

Presenter:Presenter: Deborah Brisbin, P.E.Deborah Brisbin, P.E.

Page 15: Foundation Design including Retaining Walls - RISA · PDF fileNEW! Retaining Walls • Soil Loading & Exterior loads • Cantilever or Supported walls • Stem Wall & Footing Wall

Questions?Questions?

Please let us know if you have questions.

W ill i i i d i hWe will answer as many questions as time permits during the webinar.

Once the webinar is closed, we will post all Q&A’s, the PowerPoint slides and the models used today to our website: www risa comwww.risa.com

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

Thank you for Attending!Thank you for Attending!

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