Optimum design and application of non‐traditional tuned mass damper toward seismic response control with experimental test verification

Abstract

SUMMARYA variant type of tuned mass damper (TMD) termed as 'non-traditional TMD (NTTMD)' is recently proposed. Mainly focusing on the employment of TMD for seismic response control, especially for base-isolated or high-rise structures, this paper aims to derive design formulae of NTTMDs based on two methodologies with different targets. One is the fixed points theory with the performance index set as the maximum magnitude of the frequency response function of the relative displacement of the primary structure with respect to the ground acceleration, and the other is the stability maximization criterion (SMC) to make the free vibration of the primary structure decay in the minimum duration. Such optimally designed NTTMDs are compared with traditional TMDs by conducting both numerical simulations and experiments. The optimum-designed NTTMDs are demonstrated to be more effective than the optimum-designed traditional TMDs, with smaller stroke length required. In particular, the effectiveness of the TMDs combined with a base-isolated structure is investigated by small-scale model experimental tests subjected to a time scaled long period impulsive excitation, and it is demonstrated that the SMC-based NTTMD can suppress structural free vibration responses in the minimum duration and requires much smaller accommodation space. Additionally, a small-scale shaking table experiment on a high-rise bending model attached with a SMC-based NTTMD is conducted. This study indicates that NTTMD has a high potential to apply to seismic response control or retrofit of structures such as base-isolated or central column-integrated high-rise structures even if only a limited space is available for accommodating TMDs.

Seismic vibration and damage control of high‐rise structures with the implementation of a pendulum‐type nontraditional tuned mass damper

“…According to previous studies, [23,24,26] the degree of stability will be maximized if the two pairs of conjugate eigenvalues of the system are identical. The corresponding optimum values of rotational stiffness and damping ratio can be solved using…”

Energy‐based predictive algorithm for semi‐active tuned mass dampers

“…Some researchers have studied the performance of the TMDs for various types of excitations, whereas others investigated the influence of different parameters to arrive at optimum values and optimum design strategies for the dampers. Some nontraditional TMD configurations have been examined for their efficacy by Gerges and Vickery, Soto and Adeli, and Xiang and Nishitani . Furthermore, researchers such as Jiang et al, Lu et al, and Lu et al have conducted experimental studies on the TMDs to investigate their behaviors when installed in structures.…”

“…Some nontraditional TMD configurations have been examined for their efficacy by Gerges and Vickery, [26] Soto and Adeli, [27] and Xiang and Nishitani. [28] Furthermore, researchers such as Jiang et al, [29] Lu et al, [30] and Lu et al [31] have conducted experimental studies on the TMDs to investigate their behaviors when installed in structures. However, the extent of response reduction achieved by the PTMDs and the range of excitation frequency in which they are effective is limited.…”

Data‐Driven Two‐Level Performance Evaluation of Eddy‐Current Tuned Mass Damper for Building Structures Using Shaking Table and Field Testing

“…In the context of innovative control technologies, the tuned mass damper (TMD) has been mostly developed and applied with alternative strategies (Amini et al., ; Gutierrez Soto and Adeli, ). The novel damping mechanism has been actively adopted to further improve the performance of conventional TMDs, especially under earthquake excitations (Wierschem et al., ; Xiang and Nishitani, ). Recently, the concept of eddy‐current (EC) damping was illustrated for the vibration suppression of beam‐type structures (Sodano et al., ; Bourquin et al., ); it was theoretically studied as a magnetoelastic oscillator (Kumar et al., ); and it was feasibly illustrated for TMD applications (Wang et al., ).…”