Deterministic and Probabilistic Serviceability Assessment of Footbridge Vibrations due to a Single Walker Crossing

Table 1

Suggested damping ratios for different construction material, as given by different standards and guidelines.

Type	Damping ratios
	Sétra		Hivoss		ISO 10137		FIB
	Min	Mean	Min	Mean	Mean	Mean	Min	Mean
Reinforced concrete	0.8	1.3	0.8	1.3	0.8	1.5	0.8	1.2
Prestressed concrete	0.5	1.0	0.5	1.0		1.0	0.7	1.0
Steel	0.2	0.4	0.2	0.4	0.5	0.2/	0.5	1.0
Composite steel-concrete	0.3	0.6	0.3	0.6	0.6	0.6	0.6	1.0
Timber	1.5	3.0	1.0	1.5	-	1/	0.8	1.4

[71], EC3 [72], and EC5 [26]; if welded/bolted connection are present; 1% if no mechanical joints are present and 1.5% otherwise.