TY - JOUR ID - 3540 TI - Comparing performance of TMD and MTMD vertically distributed in height for multi-modal seismic control of tall buildings JO - Amirkabir Journal of Civil Engineering JA - CEEJ LA - en SN - 2588-297X AU - akhlagh pasand, Ali AU - fatollah pour, amirhosein AU - Zahrai, S. Mehdi AD - civil engineering, school of civil engineering, university of Tehran, Tehran, Iran AD - civil engineering, faculty of civil engineering, university of Zanjan, Zanjan, Iran AD - civil Engineering, school of civil engineering, university of Tehran, Tehran, Iran Y1 - 2020 PY - 2020 VL - 52 IS - 10 SP - 2563 EP - 2582 KW - single tuned mass dampers (STMD) KW - Multiple tuned mass dampers (MTMD) KW - Passive control KW - dynamic time history analysis KW - modal analysis DO - 10.22060/ceej.2019.15584.5959 N2 - Nowadays, vibration control in civil engineering is commonly used. Tuned mass damper (TMD) is one of the simplest and most reliable control instruments, which consists of a mass, spring, and damper. TMDs are usually set to the frequency of the first mode of the structure. The sensitivity of the TMD to the changes of structure’s frequency is considered as the weaknesses of this controlling system, and the lack of adjustment of the damper’s parameters to its optimum state or the changes in the structure’s frequency leads to the inefficiency of the system. The non-linear behavior of the structure is an example of changing the natural frequency of the structure during vibration. In this study, to investigate and compare the performance of the single mass damper in the maximum modal displacement (roof) and multiple mass dampers vertically distributed in the height of the structure, based on the modal analysis, two linear and nonlinear models of a 40-story structure were selected. The structure has been modeled in OpenSees software using seven earthquake records. The analysis results for applied earthquakes under the maximum acceleration of 1.0g show that the control of the linear structure by multiple tuned mass dampers (MTMDs) tuned to the first and second modes have more appropriate behavior than others, and the average reduction of the maximum displacement of the roof applying this type of dampers is 14.5%, which is about 2 times more than reduction of the STMD tuned to the first mode and the MTMDs tuned to the first or second modes, systems. However, due to the assumption of tuning the design parameters of the dampers corresponding to their elastic behavior, the performance of single and multiple mass dampers slightly decreases in a nonlinear model of the structure while structural responses are still controlled. Also, for the 10% error caused by misadjusting of the dampers, the behavior of MTMDs is more appropriate. UR - https://ceej.aut.ac.ir/article_3540.html L1 - https://ceej.aut.ac.ir/article_3540_70af601f13b5ffc352352a6b4f2a176d.pdf ER -