Measurement-Based Vehicle Load Model for Urban Expressway Bridges

Table 5

Fatigue load spectrum for urban expressway bridges.

Type of vehicle	Total axles	Vehicle parameters; (axle weight, t; axle space, m)	Total weight (t)	Frequency as a percentage of traffic volume (%)
M1	2	(3.30)^a [5.23]^b (8.49)	11.79	16.43
M2	3	(4.79) [2.10] (5.63) [5.75] (14.57)	25.00	0.55
M3	3	(8.82) [5.07] (18.38) [1.54] (18.89)	46.09	0.60
M4	4	(7.45) [2.52] (10.35) [5.34] (17.77) [1.40] (18.22)	53.79	1.25
M5	5	(5.72) [3.73] (13.78) [6.60] (12.76) [1.43] (11.90) [1.35] (12.35)	56.50	0.34
M6	6	(5.00) [2.60] (7.77) [2.19] (11.78) [6.74] (11.89) [1.38] (11.54) [1.37] (12.57)	60.55	0.35
Amount to				19.52

aFigures in parentheses represent the equivalent axle weight.
^bFigures in square brackets represent the equivalent axle space.