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1 ACHITECTUAL STUCTUES: FOM, BEHAVIO, AND DESIGN D. ANNE NICHOLS FALL 2013 lectre twety oe steel costrctio: rmc.org bolts, welds & light gages Coectios eeded to: spport beams by colms coect trss members splice beams or colms trasfer load sbjected to tesio or compressio shear bedig Steel Bolts & Weldig 1 Architectral Strctres F2009ab Steel Bolts & Weldig 2 Bolts bolted steel coectios Welds welded steel coectios Steel Bolts & Weldig 3 (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 4 1

2 Bolts types materials high stregth A307, A325, A490 locatio of threads iclded - N exclded - X frictio or bearig (SC) always tighteed Bolted Coectio Desig cosideratios bearig stress yieldig shear stress sigle & doble member rptre Steel Bolts & Weldig 5 Lectre 18 S2011ab Steel Bolts & Weldig 6 Bolts rarely fail i bearig holes cosidered 1/8 larger shear & tesio sigle shear or tesio doble shear F a A b F 2A b v v 0.75 Bolts Steel Bolts & Weldig 7 Lectre 18 S2011ab Steel Bolts & Weldig 8 Lectre 18 S2011ab 2

3 Bolts bearig 0.75 deformatio is cocer 1. 2L tf 2. 4dtF deformatio is t cocer 1. 5L tf 3. 0dtF log slotted holes a c c c 1. 0L tf 2. 0dtF Bolts L c clear legth to edge or ext hole (ex. 1¼, 3 ) Steel Bolts & Weldig 9 Lectre 18 S2011ab Steel Bolts & Weldig 10 Lectre 18 S2011ab Welded Coectio Desig cosideratios shear stress yieldig rptre Welded Coectio Desig weld terms btt weld fillet weld plg weld throat field weldig shop weldig (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 11 Steel Bolts & Weldig 12 3

4 Welded Coectio Desig weld process meltig of material melted filler - electrode shieldig gas / flx potetial defects weld materials E60XX E70XX F EXX = 70 ksi Welded Coectio Desig shear failre assmed throat T = x weld size area A = T x legth of weld weld metal geerally stroger tha base metal (ex. F y = 50 ksi) Steel Bolts & Weldig 13 Steel Bolts & Weldig 14 Lectre 18 S2011ab Welded Coectio Desig miimm table maximm material thickess ( to ¼ ) 1/16 less mi. legth 4 x size mi. 1 ½ Welded Coectio Desig shear 0. 6F EXX area table for S a Tl Sl 0.75 Steel Bolts & Weldig 15 Lectre 18 S2011ab Steel Bolts & Weldig 16 Lectre 18 S2011ab 4

5 Framed Beam Coectios agles bolted welded Framed Beam Coectios terms copig (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 17 Steel Bolts & Weldig 18 Framed Beam Coectios tables for stadard bolt sizes & spacigs # bolts bolt diameter, agle leg thickess bearig o beam web Framed Beam Coectios welded example (shear) (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 19 Lectre 18 S2011ab Steel Bolts & Weldig 20 5

6 Framed Beam Coectios welded momet example Framed Beam Coectios welded/bolted momet example (AISC - Steel Strctres of the Everyday) (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 21 Steel Bolts & Weldig 22 Framed Beam Coectios welded/bolted momet example Beam Coectios LFD provisios shear yieldig shear rptre block shear rptre tesio yieldig tesio rptre local web bcklig lateral torsioal bcklig (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 23 Steel Bolts & Weldig 24 6

7 Beam Coectios 0. 6F A U F A 0. 6F v bs where U bs is 1 for iform tesile stress t y A gv 0.75 U F A bs t Other Coectios seated beam cotios beam to colm beam to beam block shear rptre tesio rptre Steel Bolts & Weldig 25 Lectre 18 S2011ab Steel Bolts & Weldig 26 Other Coectios splices Other Coectios rigid frame kees gssets & joits The oyal Otario Msem Toroto. Caada Daiel Libeskid (AISC - Steel Strctres of the Everyday) (AISC - Steel Strctres of the Everyday) Steel Bolts & Weldig 27 Steel Bolts & Weldig 28 7

8 Other Coectios base plates achor bolts bearig o steel bedig of plate Steel Bolts & Weldig 29 8

twenty one steel construction: bolted & welded connections ARCHITECTURAL STRUCTURES: FORM, BEHAVIOR, AND DESIGN DR. ANNE NICHOLS SPRING 2015 lecture

twenty one steel construction: bolted & welded connections ARCHITECTURAL STRUCTURES: FORM, BEHAVIOR, AND DESIGN DR. ANNE NICHOLS SPRING 2015 lecture ARCHITECTURAL STRUCTURES: FORM, BEHAVIOR, AND DESIGN DR. ANNE NICHOLS SPRING 2015 lecture twenty one steel construction: nrmc.org bolted & welded connections Steel Bolts & Welding 1 Connections needed

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