Evaluation of the Floor Acceleration Amplification Demand of Instrumented Buildings

Table 4

Velocity factor (α) in the concrete buildings.

Height type	PGA (g)	Fitted	65%	75%	85%
Lowrise	≤0.035	2.25	2.34	2.74	3.00
	0.035–0.1	2.03	1.88	2.48	3.00
	0.1–0.2	1.70	1.35	2.23	2.58
	>0.2	1.31	1.53	1.82	2.02
Highrise	≤0.035	1.92	1.82	2.30	3.00
	0.035–0.1	1.82	2.15	2.66	3.00
	0.1–0.2	0.74	1.00	1.15	1.77
	>0.2	0.48	1.00	1.00	1.00
Skyscraper	≤0.035	1.66	2.27	3.00	3.00
	0.035–0.1	NA	NA	NA	NA
	0.1–0.2	NA	NA	NA	NA
	>0.2	NA	NA	NA	NA

Note. “NA” denotes that no data were available.