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Lesson 5: Gravity Load Path
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What Supports What?
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What Supports What?
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What Supports What?
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What Supports What? 2 G1 G2
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What Supports What? – LOAD PATH
2 G1 G2
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What Supports What? – LOAD PATH
G2
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What Supports What? – LOAD PATH
G2 B C
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What Supports What? – LOAD PATH
G2 B C
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What Supports What? – LOAD PATH
2 3 G2 B C
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What Supports What? – LOAD PATH
B
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What Supports What? – LOAD PATH
G2 1 B
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Prob.1: 300plf 600plf Beams 1 and 4: 300 plf Beams 2 and 3: 600 plf
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Prob.1: All Members are W16x50
300plf 600plf Beams 1 and 4: 300 plf Beams 2 and 3: 600 plf 600plf 300plf
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Simple-Braced Building
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Simple-Braced Building
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All Connections Simple (pins)
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Building System Parts/Terms
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Building System Parts/Terms
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Building System Parts/Terms
Column
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Building System Parts/Terms
Fill Beam Column
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Building System Parts/Terms
Fill Beam Girder Column
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Building System Parts/Terms
Interior Fill Beam Interior Girder Exterior Fill Beam Exterior Girder Column
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Brace (truss) 1 Story Building
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Slab = “Diaphragm” Brace prevents X-direction Movement of this point
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Slab = “Diaphragm” Brace prevents X-direction Movement of this point
Y-direction Movement of this point
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Slab = “Diaphragm” Brace prevents X-direction Movement of this point
Y-direction Movement of this point Slab is rigid in X-Y Plane. Slab is connected to every other point
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Slab = “Diaphragm” Braced Braced Braced Braced Braced Braced Braced
Slab is rigid in X-Y Plane. Slab is connected to every other point. Therefore: Slab + braced points = Every column is braced. Braced
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Slab = Diaphragm: a body that with planar rigidity
Slab = Diaphragm: a body that with planar rigidity. With several braces and a floor diaphragm, all columns are braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Braced Slab is rigid in X-Y Plane. Slab is connected to every other point. Therefore: Slab + braced points = Every column is braced. Braced
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1 Story Building Beam-Column Connections: Pins Foundations: Pins
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1 Story Building mmmmm… Strangely familiar…..
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1 Story Building
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1 Story Building
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1 Story Building
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1 Story Building
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Homework Lesson 4
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Beam FBD’s
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6k 6k 6k Beam FBD’s
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Gravity, only 60k 60k 60k 60k 60k 60k Beam FBD’s
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Gravity, only 60k 60k 60k 60k 60k 60k 60k 120k 120k 60k Column FBD’s
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Now, Adding Lateral Force
60k 60k 60k 60k 60k 60k 0k 0k 0k 60k 120k 120k 60k Column FBD’s
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Now, Adding Lateral Force
60k 60k 60k 60k 60k 60k 0k 0k 6k 0k 60k 120k 120k 60k Column FBD’s
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