An Investigation of Damage Mechanism Induced by Earthquake in a Plate Girder Bridge Based on Seismic Response Analysis: Case Study of Tawarayama Bridge under the 2016 Kumamoto Earthquake

Table 4

Number of members according to σ/σ_y values.

σ/σy value	Undamped	Design EQ	EW	NS	EW and NS
σ > 1	66	16	0	6	0
0.8 < σ ≤ 1	100	13	2	5	10
σ < 0.8	228	365	392	383	384
Max. σ	1.59	1.2	0.85	1.2	0.97