Analysis and modelling of the seismic behaviour of high ... - Ingegneria

3. SEISMIC BEHAVIOUR OF BOLTED END PLATE BEAM-TO-COLUMN STEEL JOINTS
where:
E I
φ φ
s b
≤ ⋅ ( 3.10 )
LbM pl, Rd
Mpl,Rd beam plastic moment;
Ib moment of inertia of the beam;
Lb beam length;
Es steel Young modulus.
• nominally pinned: it cannot develop significant moments, which might
adversely affect members of the structure
Numerically we obtain:
if 0,5 m
2
φ
φ ≤ ≤ ( 3.11 )
if φ ≥ 0,5 m ≤ 0,25
( 3.12 )
• semi-rigid: a joint, which does not meet the criteria for a rigid joint or a
nominally pinned joint, shall be classified as a semi-rigid joint.
The aforementioned formulas are represented in the following Figure 3.20.
m
1
2/3
0,25
_
φ
Rigid Joint
1 2
Semi-rigid Joint
Pinned Joint
_
φ 0,5
Figure 3.20. Classification of the Joint in accordance with Eurocode 3
According to strength, a joint can be classified as full-strength, partial strength or
nominally pinned by comparing its moment resistance with the moment resistances
of the connected members. In detail:
_
φ
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