Analytical Solutions for Girder Distribution Factor in Steel-Concrete Composite Girders with the Effect of Parapets

Table 4

Geometric properties of composite girder.

Case	Name	Cross section	Distance between neutral axis and bottom flange z (cm)	Bending stiffness EI (N·mm^2)
1	C30 deck (Ec = 30,000 MPa)		84.77	2.63 × 10^15
2	C40 deck (Ec = 32,500 MPa)		85.91	2.68 × 10^15
3	C50 deck		86.74	2.72 × 10^15
4	C60 deck (Ec = 36,000 MPa)		87.32	2.75 × 10^15
5	C50 deck (Ec = 34,500 MPa) and continuous layer		93.96	3.24 × 10^15
6	C50 deck and continuous layer and asphalt layer		94.21	3.26 × 10^15
7	C50 deck and continuous layer and asphalt layer and C30 parapet (single girder)		121.10	1.07 × 10^16
8	C50 deck and continuous layer and asphalt layer and C30 parapet (twin girders)		110.11	1.51 × 10^16
9	C50 deck and continuous layer and asphalt layer (twin girders)		94.21	6.52 × 10^15
10	C50 deck and continuous layer and asphalt layer and C30 parapet (three girders)		105.50	1.88 × 10^16
11	C50 deck and continuous layer & asphalt layer (three girders)		94.21	9.78 × 10^15