Steel Bolts & Welding 1
Lecture 21 Architectural Structures
ARCHITECTURAL STRUCTURES:
FORM, BEHAVIOR, AND DESIGN
lecture
twenty one
steel construction:
bolted & welded connections
nrmc.org
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Welded Connections - Architectural Structures - Lecture Slides, Slides of Structural Design and Architecture
Welded Connections, Support Beams By Columns, Connect Truss Members, Splice Beams or Columns, Transfer Load, Tension or Compression, Bolted Steel Connections, Welded Steel Connections, High Strength, Location of Threads. Its lecture of Architectural Structures. A complete lecture series is in my files.
Typology: Slides
2011/2012
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Steel Bolts & Welding 1Lecture 21 Architectural Structures
ARCHITECTURAL STRUCTURES: FORM, BEHAVIOR, AND DESIGN
lecture
twenty one
steel construction:
bolted & welded connections
nrmc.org
Steel Bolts & Welding 2 Lecture 21
Connections
- needed to:
- support beams by columns
- connect truss members
- splice beams or columns
- transfer load
- subjected to
- tension or compression
- shear
- bending
Steel Bolts & Welding 4Lecture 21 Architectural Structures
Welds
- welded steel connections
http://courses.civil.ualberta.ca
Steel Bolts & Welding 5Lecture 21 Architectural Structures
Bolts
- types
- materials
- high strength
- A307, A325, A
- location of threads
- included - N
- excluded - X
- friction or bearing (SC)
- always tightened
- materials
Steel Bolts & Welding 7 Lecture 21
Bolts
- rarely fail in bearing
- holes considered 1/8” larger
- shear & tension
- single shear or tension
- double shear
v 0 .7 5
R (^) n Fn Ab
R (^) n Fn 2 Ab
(^) Ru v Rn n a
R R
Bolts
Steel Bolts & Welding 8Lecture 21
Bolts
Steel Bolts & Welding 10Lecture 121
Steel Bolts & Welding 11 Lecture 21
Welded Connection Design
- considerations
- shear stress
- yielding
- rupture
Steel Bolts & Welding 13Lecture 21
Welded Connection Design
- weld process
- melting of material
- melted filler - electrode
- shielding gas / flux
- potential defects
- weld materials
- E60XX
- E70XX FEXX = 70 ksi
Steel Bolts & Welding 14Lecture 21
Welded Connection Design
- shear failure assumed
- throat
- T = 0.707 x weld size
- area
- A = T x length of weld
- weld metal generally stronger than base metal (ex. Fy = 50 ksi)
- shear
- table for S
Steel Bolts & Welding 16Lecture 21
Welded Connection Design
area
a ^ n
R R Ru R n 0 .7 5
R (^) n 0_._ 6 FE X X T l S l
Steel Bolts & Welding 17Lecture 21
Framed Beam Connections
- angles
- bolted
- welded
Steel Bolts & Welding 19Lecture 21
Framed Beam Connections
- tables for standard
bolt sizes & spacings
- # bolts
- bolt diameter, angle
leg thickness
- bearing on
beam web
Steel Bolts & Welding 20Lecture 21
Framed Beam Connections
- welded example (shear)
(AISC - Steel Structures of the Everyday)