Strain-Based Evaluation of a Steel Through-Girder Railroad Bridge

Table 1

Section properties of the floor system members.

	Area	Torsional constant	𝐼𝑥	𝐼𝑦	Major axis shear area	Minor axis shear area	𝑆𝑥	𝑆𝑦
	cm^2	cm^4	cm^4 (*10^3)	cm^4	cm^2	cm^2	cm^3 (*10^3)	cm^3
Girder X1^+	490.8	196.2	5059	540.7	241.4	174.2	3837	1108
Girder X2^+	513.7	238.7	5384	29611	241.4	200.0	3924	1457
Girder X3^+	560.0	292.9	6215	29611	241.4	264.5	4882	1457
Girder X4^+	674.2	1051	8122	47371	241.4	393.5	6302	2331
Girder X5^+	787.7	3111	10076	65128	241.4	522.6	7724	3205
Girder X6^+	901.9	7122	12078	82888	241.4	651.6	9148	4079
Floor beam	294.7	148.3	170.4	5927	86.64	125.8	5.590	291.7
Stringer	65.81	21.13	9.448	416.2	32.93	32.88	0.6194	20.48

⁺X1 through X6 denotes the different girder cross-sections based on the number of cover plates.