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

Abstract

To improve seismic resilience and sustainability of structures, a pendulum-type nontraditional tuned mass damper (PNTTMD) system with re-centering mechanism is proposed for high-rise structures with nonnegligible bending deformation involved. This proposal is motivated by the self-centering behavior of structural components in ancient structures, for example, Greek tower or pagodas, with the assistance of gravity. Analytic formulae employing the stability maximization criterion for optimum design of the PNTTMD are derived, where the rotational angle of the roof is considered. Satisfactory vibration and damage control effects of the PNTTMD system are verified through experimental and numerical investigations. earthquake-resistant system should return to original position after an earthquake and reduce or eliminate cumulative damage to its main structural elements.One approach to control seismic damages is to employ a self-centering system, which has been extensively studied all over the world during the past 20 years. [4] There are multiple types of self-centering systems. They can be generally classified into three categories: rocking systems, [5,6] moment resisting frames, [7][8][9] and self-centering bracings. [10] Residual deformations of nonreplaceable structural elements can be reduced or even eliminated after earthquake ground motions through gap opening mechanisms with assistance of re-centering force. [10][11][12] On the other hand, another passive control system, referred to as tuned mass damper (TMD) system, is commonly implemented for vibration response mitigation (e.g., the previous studies [13][14][15][16][17][18][19][20] ). For a traditional TMD, damping devices are installed between auxiliary mass and primary structures. A nontraditional TMD system [21][22][23] employs a damping device installed between the auxiliary mass and the ground. It provides inexpensive and convenient solutions in some cases. For example, the case in which the damping devices are too massive to be attached between the primary structure and the auxiliary mass. It can also achieve performance superior to that of a corresponding traditional TMD system.In a previous study of the authors, [24] an innovative seismic resisting system integrating a self-centering pendulum-type nontraditional TMD (PNTTMD) has been proposed, in which the weight of moveable parts acts as the re-centering force, referring to the earliest examples of self-centering structures (e.g., Greek temples or pagodas). In the previous study, the PNTTMD system has been studied towards shear type of building structures. The equations of motion and optimum design formulae have been derived, and their validity has been experimentally verified. The system achieves satisfying vibration control effects with only limited movement space required. However, the derived optimum design formulae are not applicable to high-rise structures, where nonnegligible bending deformation is involved. The rotational angle of the roof should be considered during the derivation of the opti...

Experimental and numerical studies of a novel asymmetric nonlinear mass damper for seismic response mitigation

“…For example, TMD was designed to have adjustable stiffness by changing its pendulum length; shape memory alloy springs were employed in TMD to adjust its stiffness property; a certain degree of nonlinearity in TMD stiffness was explored by connecting a spring to a rotating mass or inserting a very small gap between the TMD and the primary mass . In parallel with the studies of adjustable stiffness in TMDs, some methods to adjust the TMD mass and damping have also been studied . To achieve these targets, however, these adaptive TMDs further complicated the configurations, required temperature‐sensitive materials, or were only applicable to specific control situations.…”

“…34 In parallel with the studies of adjustable stiffness in TMDs, some methods to adjust the TMD mass and damping have also been studied. [35][36][37][38][39][40] To achieve these targets, however, these adaptive TMDs further complicated the configurations, required temperature-sensitive materials, or were only applicable to specific control situations.…”

An adaptive‐passive retuning device for a pendulum tuned mass damper considering mass uncertainty and optimum frequency

“…The tuned mass damper (TMD), one of the most traditional vibration control devices, is usually composed of a mass, some springs, and a dashpot . As a TMD has the advantage of small size and good control effect when well tuned, it has wide application in vertical vibration control for footbridges and floor structures as well as horizontal vibration control for building structures …”

Modeling, simulation, and validation of a pendulum-pounding tuned mass damper for vibration control

“…10 To increase the robustness and control performance of TMD devices, damping units were introduced in TMD systems, which can be supplied by magneto-rheological dampers, [18][19][20][21] particle (or impact) dampers, 22,23 eddy current dampers, [24][25][26][27][28] and friction dampers. 29,30 Moreover, pendulum TMDs were proposed to enhance the control performance of traditional TMDs by employing the nonlinearity of the pendulum mass, [31][32][33][34] and several applications in vibration control of civil structures have been reported in Roffel et al 35 , Shu et al 36 , and Sun and Jahangiri. 37 With more and more interests in self-powered dampers, a pendulum TMD with a rotary electromagnetic device was proposed to simultaneously realize dual functions of vibration control and energy harvesting.…”