Closed‐form optimal solution of two‐degree‐of‐freedom system with Inerter based on equal modal damping with potential application in non‐structural elevator for seismic control

Earthquake Engineering & Structural Dynamics, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 26, 2024

Abstract Targeting the great demand for adding non‐structural elevators to old residential buildings, this article proposes an updated configuration of tuned mass damper inerter (U‐TMDI) applied in external elevators. An analog 2‐DOF system is established describe building controlled by elevator. Then, three closed‐form optimal solutions designing U‐TMDI are derived via fixed‐point method, equal modal damping criterion, and infinity assumption. Subsequently, these compared discussed involving expressions tuning frequency ratio parameters, root locus diagram supplemental ratios, transfer function, robustness variation, respectively. Finally, a example adopted validate feasibility proposed retrofitting strategy design solutions. It demonstrated that ratios method criterion different due influence elevator stiffness , while its degradation forms (TMD) identical, recognizing importance stiffness. Moreover, using can significantly mitigate main structure displacement about 18%∼23% both far‐field near‐fault earthquakes.

Language: Английский

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Damping Enhancement Solution for Wind Turbines Through Amplifying Damping Transfer Systems

International Journal of Structural Stability and Dynamics, Journal Year: 2023, Volume and Issue: 24(09)

Published: July 28, 2023

This paper proposed a novel amplifying damping transfer system (ADTS) as new enhancement solution for high-rise structures like wind turbines. The ADTS can the upper rotation of turbine tower to its bottom with amplification mechanism. Hence, viscous damper be installed on turbines in very convenient and efficient way. dynamic characteristics equipped were parametrically investigated concerning influence damping, stiffness, position based complex frequency analysis. It was found that each mode has maximum ratio, which is affected by stiffness position. optimal first about 0.7 H (turbine height), positions second are at 0.3 0.86 H. considerably attenuated both drift acceleration responses caused winds earthquakes. For example, compared optimized tuned mass damper, further decreases displacement (acceleration) 22% (38%).

Language: Английский

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Review on response amplification damper for seismic resilient building structures

Journal of Constructional Steel Research, Journal Year: 2024, Volume and Issue: 223, P. 109065 - 109065

Published: Oct. 15, 2024

Language: Английский

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Comparative Analysis of Seismic–Induced Vibration Response Control in Multi–Inerter–Negative Stiffness Damped Outrigger Systems

Buildings, Journal Year: 2025, Volume and Issue: 15(3), P. 441 - 441

Published: Jan. 30, 2025

The functionality and structural safety of super high–rise buildings are significantly challenged during seismic events. Although conventional damped outrigger (CDO) systems effectively mitigate seismic–induced vibrations, the energy dissipation capacity remains inherently limited. An inerter, with lightweight tuning capabilities dynamic negative stiffness characteristics, can enhance efficiency when integrated elements. To control performance this study proposes a multi–inerter–negative (INSDO) system focuses on different INSDO combinations to improve responses buildings. Taking dual–outrigger as an example, systematically compares performances five configurations. results demonstrate that all these configurations achieve notable damping performances, AND combination delivering optimal outcomes. This improvement is attributed synergistic interaction between inerter elements, which enhances damper’s hysteretic improves its capacity. configuration exceeds single by 71.37%.

Language: Английский

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Advanced Seismic Performance Assessment of a Base-Isolated Open Ground-Reinforced Concrete Structure Using Passive Negative Stiffness Device and Fluid Viscous Dampers

Journal of Earthquake Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 24

Published: Feb. 19, 2025

Language: Английский

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Enhancing the seismic resilience of steel frames using damping techniques

Asian Journal of Civil Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Language: Английский

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Dynamic Response Mitigation of Adjacent Structures Using Negative Stiffness Amplifying Dampers Under Seismic and Cyclic Pulse Excitations

Iranian Journal of Science and Technology Transactions of Civil Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

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Comprehensive design strategy of the NSD–TMD controlled system with closed-form frequency-amplitude solutions

Engineering Structures, Journal Year: 2024, Volume and Issue: 315, P. 118447 - 118447

Published: June 26, 2024

Language: Английский

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Development and experimental study of disc spring-based negative-positive-uncoupled stiffness devices for structural multi-level seismic fortification

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 95, P. 110231 - 110231

Published: July 17, 2024

Language: Английский

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Experimental and analytical studies on a novel double-stage coupling damper

Thin-Walled Structures, Journal Year: 2023, Volume and Issue: 195, P. 111324 - 111324

Published: Nov. 4, 2023

Language: Английский

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