[a.sub.1] [a.sub.2] [a.sub.3] [a.sub.4] [a.sub.5] [a.sub.6] 1.198 -0.013 -0.415 -0.127 0.02 0.004 [k.sub.1] [c.sub.1] [b.sub.1] [b.sub.2] [b.sub.3] [b.sub.4] 0.659 0.011 -0.681 -0.205 0.433 0.028 [b.sub.5] [b.sub.6] -- -- -0.029 -0.003 -- -- TABLE 2: Specifications of shake table array in
BJUT. Table size 1 m x 1 m (X/Y), [PHI]600 (Z) Operation mode X/Y/Z Maximum specimen mass 5 ton Velocity [+ or -] 80 cm/s Frequency of operation 0.1~50 Hz Table mass 1 ton Number 9 Displacement [+ or -] 7.5 cm Acceleration (full load) [+ or -] 1.5 g (X/Y), 0.8 g (Z) Control mode TVC TABLE 3: Maximum strain at the bottom of Pier2 and Pier3.