Root-Locus Optimal Formula for Seismic Control of Multi-Story Structures Equipped with Tuned Mass Damper Inerter Enhanced by Negative Stiffness Considering Non-resonant Mode Contributions

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112203 - 112203

Published: Feb. 1, 2025

Language: Английский

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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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Dynamic mechanical behaviors of welded joints in power transmission construction project

Journal of Constructional Steel Research, Journal Year: 2025, Volume and Issue: 227, P. 109338 - 109338

Published: Jan. 13, 2025

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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Enhanced inertia magnification effect of Toggle-brace-type inerter-based vibration absorbers

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112326 - 112326

Published: March 1, 2025

Language: Английский

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Sensitivity analysis and multi-objective optimization of a vibration control system implemented in the base of multi-story structures

Structures, Journal Year: 2025, Volume and Issue: 75, P. 108609 - 108609

Published: March 19, 2025

Language: Английский

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Experimental investigation and seismic performance evaluation of the combined outrigger and lever amplifier damped substructure system

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112737 - 112737

Published: April 1, 2025

Language: Английский

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Evaluating optimal inerter location for tuned mass damper inerter systems in multi-storey buildings considering SSI effects

Mechanical Systems and Signal Processing, Journal Year: 2025, Volume and Issue: 232, P. 112734 - 112734

Published: April 22, 2025

Language: Английский

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Shaking table test and control effect analysis of structure with negative stiffness damped outrigger

Engineering Structures, Journal Year: 2024, Volume and Issue: 322, P. 119083 - 119083

Published: Oct. 9, 2024

Language: Английский

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Research on the Deformation Control Measures during the Construction Period of Super High-Rise Buildings with an Asymmetric Plan

Buildings, Journal Year: 2024, Volume and Issue: 14(9), P. 2904 - 2904

Published: Sept. 14, 2024

Based on the Guangzhou Business Center project, a typical super high-rise building with an asymmetric plan, taking construction speed, closure time of mega braces and belt trusses as influencing factors, parametric analysis its lateral vertical deformations, well maximum stress key structural members was conducted. The results indicated that speed had relatively small impact deformation members. However, synchronous truss compared delayed would result in smaller horizontal differences, truss. Meanwhile, timing little influence difference And earlier closure, drift ratio, greater braces. Further, control measurements were brought forward. On one hand, FEM simulation carried out according to above suggestions. other real-time monitoring also used. Finally, by comparing both results, proposed measures methods verified.

Language: Английский

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