Multi-Objective Optimization Design of Control Devices to Suppress Tall Buildings Vibrations against Earthquake Excitations Using Fuzzy Logic and Genetic Algorithms - Design Optimization of Active and Passive Structural Control Systems - page 207

Figure 17. Time history diagram of the fuzzy tuned damping ratio

Table 9. Ratio of maximum displacement, velocity and acceleration of the STMD to the TMD and the
percentage of reduction of them in seven earthquake excitations

Percentage of
reduc tion

Max
controlled
Velocity
(m/s)

Percentage of
reduc tion

Percentage of
reduc tion

Max controlled
Displacement
(m)

max controlled
Acceleration
(m/s 2 )

STMD/TMD

STMD TMD STMD TMD STMD TMD

Kocaeli 0.08/0.12 67% 48% 0.21/0.32 80% 70% 1.17/1.82 77% 64%

Chi-Chi 0.05/0.06 51% 38% 0.15/0.21 65% 51% 1.36/1.72 40% 24%

Duze 0.06/0.1 58% 31% 0.15/0.22 72% 58% 1.28/1.88 55% 34%

Kobe 0.02/0.03 78% 75% 0.09/0.12 81% 58% 1.19/1.62 50% 33%

Cape Men-
docino

0.06/0.1 56% 29% 0.22/0.31 62% 46% 1.05/1.63 57% 34%

Northridge 0.05/0.06 53% 32% 0.12/0.17 70% 57% 1.16/1.69 51% 29%

Coalinga 0.06/0.09 61% 42% 0.19/0.26 71% 60% 1.28/2.32 64% 34%

Average 0.03/0.08 61% 42% 0.11/0.26 73% 61% 1.31/1.86 60% 40%