Evaluation of Seismic Response Trends from Long-Term Monitoring of Two Instrumented RC Buildings Including Soil-Structure Interaction

Table 6

Summary of identified damping ratios for buildings A and B for pseudoflexible and flexible base models.

Building		Pseudoflexible base				Flexible base
	Mode	Damping ratio (%)				Damping ratio (%)
		Min.	Max.	Avg.	% change	Min.	Max.	Avg.	% change
Building A	1st	0.6	4.3	2.7	138%	1.2	7.3	3.4	176%
	2nd	0.5	6.6	4.3	151%	1.4	12.1	5.6	190%
	3rd	1.0	7.3	2.9	217%	1.0	8.3	3.1	240%
Building B	1st	0.5	4.9	2.9	155%	0.8	5.4	3.3	140%
	2nd	1.8	7.9	4.5	135%	2.3	9.4	4.6	154%
	3rd	1.2	10.0	5.6	158%	1.6	12.4	5.7	190%