twenty steel construction: welds & light gages nrmc.org Steel - - PowerPoint PPT Presentation

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twenty steel construction: welds & light gages nrmc.org Steel - - PowerPoint PPT Presentation

Sep 14, 2023 262 likes •435 views

E LEMENTS OF A RCHITECTURAL S TRUCTURES : F ORM, B EHAVIOR, AND D ESIGN ARCH 614 D R. A NNE N ICHOLS S PRING 2019 lecture twenty steel construction: welds & light gages nrmc.org Steel Welding 1 Elements of Architectural Structures

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SLIDE 1

S2019abn Steel Welding 1 Lecture 20 Elements of Architectural Structures ARCH 614

ELEMENTS OF ARCHITECTURAL STRUCTURES: FORM, BEHAVIOR, AND DESIGN

ARCH 614

  • DR. ANNE NICHOLS

SPRING 2019 lecture

twenty

steel construction: welds & light gages

nrmc.org

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SLIDE 2

S2019abn Steel Welding 2 Lecture 20 Elements of Architectural Structures ARCH 614

Welds

  • welded steel connections

http://courses.civil.ualberta.ca

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SLIDE 3

S2019abn Steel Welding 3 Lecture 20 Elements of Architectural Structures ARCH 614

Welded Connection Design

  • considerations

– shear stress – yielding – rupture

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SLIDE 4

S2019abn Steel Welding 4 Lecture 20 Elements of Architectural Structures ARCH 614

Welded Connection Design

  • weld terms

– butt weld – fillet weld – plug weld – throat

  • field welding
  • shop welding

(AISC - Steel Structures of the Everyday)

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SLIDE 5

S2019abn Steel Welding 5 Lecture 20 Elements of Architectural Structures ARCH 614

Welded Connection Design

  • weld process

– melting of material – melted filler - electrode – shielding gas / flux – potential defects

  • weld materials

– E60XX – E70XX FEXX = 70 ksi

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SLIDE 6

S2019abn Steel Welding 6 Lecture 20 Elements of Architectural Structures ARCH 614

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)

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SLIDE 7

S2019abn Steel Welding 7 Lecture 20 Elements of Architectural Structures ARCH 614

Welded Connection Design

  • minimum

– table

  • maximum

– material thickness ( to ¼”) – 1/16” less

  • min. length

– 4 x size min. – ≥ 1 ½”

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SLIDE 8

S2019abn Steel Welding 8 Lecture 20 Elements of Architectural Structures ARCH 614

Welded Connection Design

  • shear

– table for S

area

 

n a

R R

n u

R R  

75 .  

Sl Tl F . R

EXX n

  6

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SLIDE 9

S2019abn Steel Welding 9 Lecture 20 Elements of Architectural Structures ARCH 614

Framed Beam Connections

  • welded example (shear)

(AISC - Steel Structures of the Everyday)

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SLIDE 10

S2019abn Steel Welding 10 Lecture 20 Elements of Architectural Structures ARCH 614

Framed Beam Connections

  • welded moment example

(AISC - Steel Structures of the Everyday)

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SLIDE 11

S2019abn Steel Welding 11 Lecture 20 Elements of Architectural Structures ARCH 614

Framed Beam Connections

  • welded/bolted moment example

(AISC - Steel Structures of the Everyday)

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SLIDE 12

S2019abn Steel Welding 12 Lecture 20 Elements of Architectural Structures ARCH 614

Framed Beam Connections

  • welded/bolted moment example

(AISC - Steel Structures of the Everyday)

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SLIDE 13

S2019abn Steel Welding 13 Lecture 20 Elements of Architectural Structures ARCH 614

Light-gage Steel

  • sheet metal

– shaped – studs, panels, window frames – gage

  • based on weight of

41.82 lb/ft2 / inch of thickness

  • 24, 22, 18, 16, i.e.
  • 0.0239, 0.0329, 0.0474, 0.0598 in
  • 0.6, 0.85, 1.0, 1.3, 1.6 mm

http:// nisee.berkeley.edu/godden

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SLIDE 14

S2019abn Steel Welding 14 Lecture 20 Elements of Architectural Structures ARCH 614

Steel Decks

  • “Texas” style

– corrugated

  • common

– 1 – 3 spans – can be insulated – composite

  • with concrete
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SLIDE 15

S2019abn Steel Welding 15 Lecture 20 Elements of Architectural Structures ARCH 614

Steel Decks

  • load tables
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SLIDE 16

S2019abn Steel Welding 16 Lecture 20 Elements of Architectural Structures ARCH 614

Steel Decks

  • common fire proofing

– cementicious spray – composite concrete

  • non-composite

– concrete is fill

  • lateral bracing
  • diaphragm

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