Seismic Response Analysis of Multidimensional and Multiangle Long-Span Top-Supported CFST Arch Bridge

Table 3

Chord axial force ratio table of two dimensions than one dimension.

Position	Direction	Upper chord				Lower chord
		X + Y	X + Z	Y + Z	X + Y + Z	X + Y	X + Z	Y + Z	X + Y + Z
Arch foot	X	1.3	1.1	—	1.3	1.6	1.3	—	1.8
	Y	1.6	—	1.1	1.6	1.9	—	1.2	2.1
	Z	—	6.0	4.7	6.9	—	2.6	2.0	3.5
1L/8	X	1.4	1.4	—	1.6	2.1	1.6	—	2.2
	Y	1.5	—	1.2	1.7	1.3	—	1.2	1.4
	Z	—	2.5	2.0	2.9	—	2.2	2.7	3.1
1L/4	X	1.5	1.6	—	1.7	1.4	1.3	—	1.6
	Y	1.3	—	1.2	1.4	1.4	—	1.1	1.6
	Z	—	1.7	1.7	1.8	—	2.4	2.0	2.9
3L/8	X	1.6	1.3	—	1.5	1.2	1.3	—	1.3
	Y	2.0	—	1.3	1.9	1.7	—	1.3	1.8
	Z	—	2.8	2.1	3.1	—	3.0	2.2	3.0
Vault	X	3.8	2.8	—	4.9	3.6	3.8	—	5.0
	Y	1.0	—	1.3	1.3	1.0	—	1.3	1.4
	Z	—	1.1	1.9	1.9	—	1.4	1.8	1.9

Note. The values in the table are the ratios of the chord axial force amplitudes under two-dimensional and one-dimensional excitation.