Determining the Optimal Scalar Intensity Measure of Floor Communication Towers

Table 2

IMs considered in this study.

Class	IMi		Expression
	Notation	Definition/references
Amplitude parameters	PGA	Peak ground acceleration
	PGV	Peak ground velocity
	PGD	Peak ground displacement
	V/A	Ratio of peak velocity to peak acceleration	PGV/PGA
Spectrum parameters	EPA	Effective peak acceleration
	EPV	Effective peak velocity
	SI	Housner spectral intensity
	Sa(T1)	Spectral acceleration at the fundamental period
Duration parameters	Udu	Consistent duration
	Sdu	Duration of strong ground motion
Energy parameters	CAV	Cumulative absolute velocity
	CAVS	Standard cumulative absolute velocity
	MIV	Maximum incremental speed
	MID	Maximum incremental displacement
	AI	Arias intensity