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

Table 5

Upper chord displacement ratios.

Direction	Position	X + Y	X + Z	Y + Z	X + Y + Z
X	1L/8	1.0	1.1	—	1.2
	1L/4	1.1	1.1	—	1.2
	3L/8	1.1	1.0	—	1.1
	Vault	1.1	1.0	—	1.1
Y	1L/8	1.0	—	1.0	1.0
	1L/4	1.0	—	1.0	1.0
	3L/8	1.0	—	1.0	1.0
	Vault	1.0	—	1.0	1.0
Z	1L/8	—	3.7	1.7	4.0
	1L/4	—	4.0	1.7	4.7
	3L/8	—	4.5	2.4	6.3
	Vault	—	1.1	2.3	2.3

Note. The values in the table are the ratios of the chord displacement amplitudes under multidimensional and single-dimensional excitation.