lesson 5: load path. concrete slabs on beams one-way slabtwo-way slab

Lesson 5: Load Path

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Lesson 5: Load Path

Concrete Slabs on Beams

One-Way Slab Two-Way Slab

Concrete Slabs on Beams

One-Way Slab Two-Way Slab

Simple-Braced Building

Page 6: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

All Connections Simple (pins)

Page 7: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Page 8: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Page 9: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Column

Page 10: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Column

Fill Beam

Page 11: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Column

Fill Beam

Girder

Page 12: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Building System Parts/Terms

Column

Interior Fill Beam

Exterior GirderExterior Fill Beam

Interior Girder

Page 13: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Building

Brace (truss)

Page 14: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Slab = “Diaphragm”

Brace preventsX-directionMovement of this point

Page 15: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Slab = “Diaphragm”

Brace preventsX-directionMovement of this point

Brace preventsY-direction

Movement of this point

Page 16: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Slab = “Diaphragm”

Brace preventsX-directionMovement of this point

Brace preventsY-direction

Movement of this point

Slab is rigid in X-Y Plane.

Slab is connected to every other point

Page 17: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Slab = “Diaphragm”

Braced

Slab is rigid in X-Y Plane.

Slab is connected to every other point.Therefore: Slab +

braced points = Every column is braced.

BracedBraced

Braced

BracedBraced

Braced

Page 18: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Slab = Diaphragm: a body that with planar rigidity. With several braces and a floor diaphragm, all columns

are braced

Braced

Slab is rigid in X-Y Plane.

Slab is connected to every other point.Therefore: Slab +

braced points = Every column is braced.

BracedBraced

Braced

BracedBraced

Braced

Page 19: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story BuildingBeam-Column Connections: PinsFoundations: Pins

Page 20: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Buildingmmmmm… Strangely familiar…..

Page 21: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Building

Page 22: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Building

Page 23: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Building

Page 24: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

1 Story Building

Page 25: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Homework Lesson 4

Page 26: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Beam FBD’s

Page 27: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Beam FBD’s

6k 6k6k

Page 28: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Gravity, only

Beam FBD’s

60k 60k 60k 60k 60k 60k

Page 29: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Gravity, only

Column FBD’s

60k 60k 60k 60k 60k 60k

60k 60k120k 120k

Page 30: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Now, Adding Lateral Force

Column FBD’s

60k 60k 60k 60k 60k 60k

60k 60k120k 120k

0k 0k 0k

Page 31: Lesson 5: Load Path. Concrete Slabs on Beams One-Way SlabTwo-Way Slab

Now, Adding Lateral Force

Column FBD’s

60k 60k 60k 60k 60k 60k

60k 60k120k 120k

0k 0k 0k6k

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