Machine Learning-Based Probabilistic Seismic Demand Model of Continuous Girder Bridges

Table 1

Description of IMs.

IM	Full name	Definition	Unit
	Peak ground acceleration
	Peak ground velocity
	Peak ground displacement
	Peak velocity and acceleration ratio
	Peak displacement and velocity ratio
24	Root-mean-square of acceleration
24	Root-mean-square of velocity
24	Root-mean-square of displacement
25	Significant duration
26	Arias intensity
	Specific energy density
27	Cumulative absolute velocity
28	Cumulative absolute displacement
28	Cumulative absolute energy
	Peak spectral acceleration
	Peak spectral velocity
	Peak spectral displacement
29	Compound acceleration-related IM
29	Compound velocity-related IM
29	Compound displacement-related IM
30	Fajfar intensity