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| Performance analysis of a novel asymmetric inerter NES for seismic response mitigation |
| LIU Zhibin1,2, 3,4，TAN Ping1,2,3,4，WANG Jingjing1，CHEN Yangyang2,3,4 |
1.School of Civil Engineering, Guangzhou University, Guangzhou 510405, China;
2.Key Laboratory of Earthquake Engineering and Applied Technology in Guangdong Province, Guangzhou University, Guangzhou 510405, China;
3.Key Laboratory of Earthquake Resistance, Earthquake Mitigation and Structural Safety, Ministry of Education, Guangzhou University, Guangzhou 510405, China;
4.Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510405, China |
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Abstract This paper proposes a novel asymmetric inerter nonlinear energy sink(NES), which is composed of an asymmetric NES and an inerter element, to reduce the mass of dampers and improve the seismic mitigation performance of NES. The working principle of asymmetric inerter NES was presented, and the equations of motion of asymmetric inerter NES-attached system are derived. Asymmetric inerter NES is optimized under impulsive excitations to analyze the energy and frequency robustness of the proposed asymmetric inerter NES. Control performance and wavelet spectrum analysis of Asymmetric inerter NES under the action of earthquakes. Numerical results show that the proposed asymmetric inerter NES is as effective as asymmetric NES in response mitigation under seismic excitations and exhibits strong robustness against changes in both the energy level and the structural frequency but asymmetric inerter NES is preferred with a much smaller stroke demand and reduces the mass of dampers. Therefore, Asymmetric inerter NES demonstrates great potential as an effective control strategy for seismic response mitigation of building structures.
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Received: 23 September 2021
Published: 28 January 2023
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