Influence of Pier Size on its Failure Mode under Near-Fault Vertical Earthquake

Table 2

Longitudinal frequency ratios of piers with different diameters before and after separation.

Diameter of the piers D/m	Ratio of longitudinal natural frequencies
1.0	1.91
1.1	1.69
1.2	1.49
1.3	1.35
1.4	1.23
1.5	1.16
1.6	1.11
1.7	1.08