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

All Connections Simple (pins)

Building System Parts/Terms

Building System Parts/Terms

Building System Parts/Terms

Column

Building System Parts/Terms

Column

Fill Beam

Building System Parts/Terms

Column

Fill Beam

Girder

Building System Parts/Terms

Column

Interior Fill Beam

Exterior GirderExterior Fill Beam

Interior Girder

1 Story Building

Brace (truss)

Slab = “Diaphragm”

Brace preventsX-directionMovement of this point

Slab = “Diaphragm”

Brace preventsX-directionMovement of this point

Brace preventsY-direction

Movement of this point

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

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

Braced

BracedBraced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

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

Braced

BracedBraced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

Braced

1 Story BuildingBeam-Column Connections: PinsFoundations: Pins

1 Story Buildingmmmmm… Strangely familiar…..

1 Story Building

1 Story Building

1 Story Building

1 Story Building

Homework Lesson 4

Beam FBD’s

Beam FBD’s

6k 6k6k

Gravity, only

Beam FBD’s

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

Gravity, only

Column FBD’s

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

60k 60k120k 120k

Now, Adding Lateral Force

Column FBD’s

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

60k 60k120k 120k

0k 0k 0k

Now, Adding Lateral Force

Column FBD’s

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

60k 60k120k 120k

0k 0k 0k6k