Development of Dynamic Impact Factor Expressions for Skewed Composite Concrete-Steel Slab-On-Girder Bridges

Table 1

Impact factors specified by various codes.

Country	Impact factor (IF)	Code (specification)
US	[15.24/(L + 38.10)] ≤ 0.30	AASHTO [28]
UK	0.25	BS5400 [29]
France	[0.64/(1 + 0.2 L)] ≤ 0.30	French cahier des prescriptions
	[0.80/(1 + 0.2 L)] ≤ 0.30
Germany	0.4 – 0.008 L(m) − 0.1 h	DIN 1072–1976
Iran	0.3 – 0.005 L(m) − 0.15 h h ≥ 0	Iranian specification bridge code