Tuned mass dampers for response control of torsional buildings

Singh, Mahendra P.; Singh, Sarbjeet; Moreschi, Luis M.

doi:10.1002/eqe.119.abs

Cited by 24 publications

(26 citation statements)

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“…To obtain accurate optimum parameters of traditional TMDs for multi‐degree‐of‐freedom primary structures in a variety of specific excitations or outputs (performance indices), several researchers employed numerical searching methods based on optimization techniques, such as Linear Quadratic Gaussian control method , genetic algorithm (GA) , gradient‐based algorithms , sub‐gradient optimization method , Davidon–Fletcher–Powell algorithm‐based numerical optimizer , a step‐by‐step iteration method integrating the golden section search method , particle swarm optimization algorithm , and the harmony searching method .…”

Section: Introduction and Review Of Traditional And Non‐traditional Tmdsmentioning

confidence: 99%

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

Xiang

Nishitani

2015

Earthq Engng Struct Dyn

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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.

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Section: Introduction and Review Of Traditional And Non‐traditional Tmdsmentioning

confidence: 99%

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

Xiang

Nishitani

2015

Earthq Engng Struct Dyn

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“…Although the application of Asym NESs for torsional response mitigation is out of the scope of the study, possible design modifications are provided herein. For example, the device can be attached to the primary structure by translational springs and viscous dampers in an eccentric manner; the device can be located toward the edge of the story plane where the torsional deformation prevails in the uncontrolled condition; two or pairs of mass dampers can be installed along the two orthogonal directions when the torsional building is subjected to bidirectional excitations; and multiple Asym NESs, similar to MTMDs, can be designed with wide frequency bandwidth to suppression vibrations of structures in both the translational mode and the torsional mode . These strategies mentioned above have already shown effectiveness in applications with TMDs.…”

Section: Working Principle Of Asym Nesmentioning

confidence: 99%

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

Wang

Liu

et al. 2020

Struct Control Health Monit

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Summary This paper proposes a novel passive mass damper, namely, asymmetric nonlinear energy sink (Asym NES), which is characterized by integrating linear and nonlinear restoring forces to mitigate the unwanted responses of building structures. The Asym NES, configured based on a cubic NES, consists of an auxiliary mass connected to the primary structure through a linear and nonlinear springs. These two springs are statically balanced at a deformed position, producing an asymmetric restoring force in the Asym NES. The study commences with a detailed working principle of the Asym NES, and the equations of motion of an Asym NES‐attached system are derived. Subsequently, experimental studies on the Asym NES designed for a small‐scale three‐story steel frame are conducted; the natural frequencies of which can be altered by changing the number of columns per story. Moreover, the performance of the Asym NES is compared with a tuned mass damper (TMD) and a cubic NES under impulsive excitations. Test results demonstrate the effectiveness of the Asym NES as well as its robustness against changes in the structural frequency. Following the experimental studies, the validated Asym NES model is further applied in the numerical investigation on a six‐story benchmark building to highlight its effectiveness and robustness in potential practical applications. Besides the impulsive excitations, an ensemble of 106 seismic ground motions with wide‐ranged energies is applied to the structures with original and decreased frequencies. Numerical results show that the proposed Asym NES is as effective as the in‐tune TMD in response mitigation under seismic excitations and exhibits strong robustness against changes in both the energy level and the structural frequency. The ingenious design and excellent efficiency of the Asym NES can offer a promising type of high‐performance device for structural control under extreme events.

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“…Mass centers and stiffness centers do not coincide. The bidirectional seismic waves cause the movement of the each oor along in 3-DoF [60].…”

Section: Bidirectional Modeling Of Controlled Building Structuresmentioning

confidence: 99%

“…The main object of the bidirectional control is to change the coupled translation-torsion response of the building structure, in order to prevent the collapse of building under bidirectional seismic waves [60]. Robustness, fault tolerance, simplicity and realiziablilty criteria are considered [63].…”

Section: Bidirectional Vibration Controlmentioning

confidence: 99%

Advances in bidirectional modeling and structural control

Paul

2015

2015 Resilience Week (RWS)

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This paper provides an overview of building structure modeling and control under bidirectional seismic waves. It focuses on different types of bidirectional control devices, control strategies, and bidirectional sensors used in structural control systems. This paper also highlights the various issues like system identification techniques, the time-delay in the system, estimation of velocity and position from acceleration signals, and optimal placement of the sensors and control devices.978-1-4799-8594-4/15/$31.00 ©2015 IEEE

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Tuned mass dampers for response control of torsional buildings

Cited by 24 publications

References 0 publications

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

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

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

Advances in bidirectional modeling and structural control

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