Joints - The Behaviour and Design of Steel Structures to EC3 - page 409

welds,anderectioncleatsmaybeusedtofacilitatefieldwelding.Theconcentrated
flangeforcesresultingfromthemoment M Ed andaxialforce N Ed mayrequirethe
other member in the joint to be stiffened (Section 4.5) in order to transfer these
forces. When suitably stiffened, such a joint acts as if rigid, and may be used in
continuous construction.
Theshear V Ed istransferredbyshearthroughtheweldsfromonemembertothe
other. The flange forces are transferred by tension through the flange welds and
by compression to the other member, while the web moment and the axial force
aretransferredbytensionthroughthewebweldsandbycompressiontotheother
member.
9.5.7 Bolted moment end plate joint
Aboltedmomentendplate(extendedendplate)joint(Figure9.12b)alsotransfers
moment M Ed ,axialforce N Ed ,andshear V Ed fromonemembertoanother.Theend
plateisfilletweldedtothewebandflangesofonemember,andboltedtotheother
member.Concentratedflangeforcesmayrequiretheothermembertobestiffened
inordertotransfertheseforces.Thisjointisalsoclassifiedasrigid, althoughitis
lessstiffthanaweldedmomentjoint,duetoflexureoftheendplate.EC3-1-8[1]
allows bolted moment end plate joints to be used in continuous construction.
Thebeammoment,axialforce,andsheararetransferredbytensionthroughthe
flange and web welds and compression, and by shear through the web welds to
theendplate, bybendingandshearthroughtheendplatetothebolts, andbybolt
shear and tension and by horizontal plate reaction to the other member.
Thebolttensionsareincreasedbypryingactionsresultingfrombendingofthe
endplate,asinFigure9.13.Theycanbedeterminedbyconsideringananalysisof
the idealised T-stub assembly of the end plate and beam web, and of the column
flange and web to which it is bolted. These prying actions must be considered in
the design of bolts subjected to tension, and are discussed in Section 9.6.2.
9.5.8 Welded splice
Afully welded splice (Figure 9.16a) transfers moment M Ed , axial force N Ed , and
shear V Ed from one member to another concurrent member.The flange welds are
butt welds, while the web welds may be fillet welds, and erection plates may be
used to facilitate site welding. A welded splice acts as a rigid joint between the
members, and may be used in continuous construction.
The shear V Ed is transferred by shear through the welds. The flange forces
resulting from the moment M Ed and axial force N Ed are transferred by tension or
compressionthroughtheflangewelds, whilethewebmomentandtheaxialforce
are transferred by tension or compression (or shear) through the web welds.
9.5.9 Bolted splice
Afully bolted splice (Figure 9.16b) also transfers moment M Ed , axial force N Ed ,
and shear V Ed from one member to another concurrent member. Flange and web