Application of Viscoelastic Tuned Mass Dampers in Vibration Mitigation of Steel Joist Jack Arch Floor Structures

Table 5

Specifications of the viscoelastic TMDs.

Property	Type 1	Type 2
Arm length (L)	650 mm	550 mm
Arm width (b)	100 mm	100 mm
Thickness of the outer steel plates (ts)	4 mm	4 mm
Thickness of the inner elastomeric layer (tr)	42 mm	42 mm
Energy dissipation factor (β)	0.12	0.12
Shear modulus of viscoelastic material (G)	0.65 MPa	0.65 MPa
Lumped mass ()	13.5 kg	18.45 g
Natural frequency ()	5.49 HZ	5.49 HZ