Research Article

Seismic Performance Evaluation of Double-Skin Semi-Base-Isolated Building Using Incremental Dynamic Analysis

Table 12

Periods and mode shapes for the first three modes of vibration based on ETABS program for model IFBC.

Number of story
1st2nd3rd4th5th6th7th8th9th10th

0.1610.2920.4340.5550.6960.8080.7870.9290.9691.00
−0.388−0.601−0.744−0.648−0.3990.000.3730.6360.8581.00
0.8021.000.7870.253−0.456−0.645−0.991−0.924−0.1671.00