PSI - Issue 64

Amir Shamsaddinlou et al. / Procedia Structural Integrity 64 (2024) 360–367 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 2. The transfer function of acceleration response.

Fig. 3. Pole placement of the system. Figure 4 compares the structure's seismic responses, such as acceleration, lateral displacement, and drift of floors in uncontrolled and controlled cases, with the designed TMD in different modes under white noise excitation. According to the results, it can be seen that the use of designed TMD is suitable for reducing the seismic responses of the structure. Meanwhile, the TMD designed by locating the system pole has a more suitable performance in reducing the seismic response of the structure. Performance indexes were used to comprehensively evaluate the seismic behavior of the structure under maximum responses and during the time history of excitation. The comparison of the results of the performance indexes is presented in Table 5.

(a) (c) Fig. 4 . Peak story responses under white noise excitation. a) Story acceleration b) Displacement c) Drift (b)

Table 5. Performance indexes of passive control systems for different strategies.

With TMD

1 2 3 4 5 6

Method

OF1

OF2

OF3

0.3947 0.6749 0.6742 0.4896 0.6879 0.6910

0.4245 0.6878 0.7582 0.5078 0.7091 0.7122

0.4332 0.6591 0.6674 0.5337 0.7119 0.7102

Event

8. Conclusion In this study, we search through the optimization of Tuned Mass Dampers (TMDs), focusing on enhancing the structural resilience against seismic loads. The innovative approach adopted here concentrates on the pole placement scheme as an essential method in structure control, showcasing its effectiveness in stabilizing the structural system.