Enhancing Seismic Resilience of Existing Reinforced Concrete Building Using Non-Linear Viscous Dampers: A Comparative Study

Actuators, Journal Year: 2023, Volume and Issue: 12(4), P. 175 - 175

Published: April 17, 2023

After the catastrophic destruction of October 2005 Kashmir earthquake, first building code Pakistan was developed in 2007. The sole purpose (BCP) to incorporate advancements earthquake-resistant design fortify structures and ensure safety citizens against future seismic events. 2007, BCP not revised till 2021 include changes over time. However, recently updated version highlights that seismicity many regions is high, which truly reflected Therefore, due growing concerns about potential risks region have been incorporated into BCP. there are among researchers designed on 2007 may need fortification. current study focuses fortification existing systems were using previous codes. Non-linear viscous fluid dampers used improve resilience structures. This compares performance an reinforced concrete with without non-linear subjected a dynamic analysis. evaluated terms story displacement, drift, acceleration, energy dissipation mechanisms. Adding structure caused decrease inter-story drift by around 31.16% roof displacement reduced 36.58%. In addition that, controlled structure, more than 70% dissipated dampers. These results indicate adding significantly improved vibration system undesirous vibrations. outcomes this also provide very detailed insight usage for improving buildings can be develop effective strategies mitigate impact events already built

Language: Английский

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Adjusted energy dissipation formula and intelligent design for nonlinear negative stiffness-based amplifying damper

Engineering Structures, Journal Year: 2025, Volume and Issue: 329, P. 119849 - 119849

Published: Feb. 3, 2025

Language: Английский

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Optimized reduction of the seismic floor acceleration response in multistory buildings with supplemental viscous dampers

Structures, Journal Year: 2025, Volume and Issue: 73, P. 108342 - 108342

Published: Feb. 5, 2025

Language: Английский

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Damping enhancement of nodal modes for stay cables using a single-sided pounding tuned mass damper (SS-PTMD)

Engineering Structures, Journal Year: 2024, Volume and Issue: 305, P. 117659 - 117659

Published: Feb. 28, 2024

Language: Английский

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Performance of multiple tuned inerter dampers optimized by a cultural algorithm to control response in buildings subjected to ground acceleration

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 92, P. 109537 - 109537

Published: May 14, 2024

Language: Английский

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Study on the Damping Efficiency of a Structure with Additional Viscous Dampers Based on the Shaking Table Test

Buildings, Journal Year: 2024, Volume and Issue: 14(6), P. 1506 - 1506

Published: May 23, 2024

This study specifically focuses on the damping efficiency of a damped structure with additional viscous dampers. A two-layer steel frame eight sets dampers is used to conduct series seismic simulation shaking table tests, including non-damped without and two structures placed at 1/2 1/6 beam span, respectively. By conducting these energy dissipation, force, displacement damper, as well parameters such floor acceleration, are obtained. The main indicators calculated, ratio, inter-story utilization rate, reduction rate vertex base shear relative structure. shows that exhibit full hysteresis loops strong dissipation capacity in response significantly smaller than Under different levels, frequent earthquakes, occasional rare effect span better span. For example, ratio for X-direction artificial wave REN 19% 11%, 20% 13%, 13% patterns displacement, similar. research findings strongly indicate exhibits excellent efficiency. In future design, designers need fully consider placement within

Language: Английский

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Multi-level performance-based seismic design optimisation of RC frames

Engineering Structures, Journal Year: 2023, Volume and Issue: 293, P. 116591 - 116591

Published: July 18, 2023

Conventional structural optimisation techniques often result in unconventional configurations, unrealistic elements and ignore actual construction costs. This paper presents an effective performance-based framework for minimising initial material costs of realistic multi-storey reinforced concrete (RC) frames, while satisfying pre-determined performance targets under multiple seismic hazard levels as well a set practical design constraints. A new low computational-cost method is proposed to directly control specific response parameters at both the element (i.e. plastic rotation inter-storey drift). For first time, concept Uniform Damage Distribution (UDD) adopted simplify complex problem RC buildings with variables terms section sizes reinforcement ratios. The optimum solution achieved by gradually redistributing materials from strong weak parts structure, aiming fully exploit capacity. efficiency then demonstrated designs 3-, 5-, 10- 15-storey frames six spectrum-compatible earthquake records. results indicate that compared structures designed current codes, solutions required up 20 % 43 less volume steel weight, respectively. It also noted due more efficient use materials, exhibited considerably lower global damage index (up 88 %), maximum drift 58 rotations 78 %). Sensitivity analysis on record selection shows using single may not lead reliable solutions, particular tall buildings, hence records should be used process. research will economical safe regions developing multi-level computational

Language: Английский

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Parametric study and prediction models of the seismic response of single-degree-of-freedom structural systems equipped with Maxwell material fluid viscous dampers

Structures, Journal Year: 2022, Volume and Issue: 43, P. 388 - 406

Published: June 29, 2022

Language: Английский

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Minimising the embodied carbon of reinforced concrete piles using a multi-level modelling tool with a case study

Structures, Journal Year: 2023, Volume and Issue: 58, P. 105476 - 105476

Published: Nov. 10, 2023

The construction industry is one of the main contributors to increasing carbon emissions globally. With an interest in optimising embodied superstructures, very little attention paid substructures although foundations are responsible for a considerable share total within any structures. This research focuses on minimising reinforced concrete piles and introduces novel multi-level modelling tool that can be used by designers discover full range feasible design scenarios with optimised environmental impact. Results show adjusting parameters like grade (fck), pile slenderness ratio (L/D) steel-to-concrete (As/Ac) lead significant cut final value carbon. applied case study monorail bridge showed 51.4% potential saving achieved through parameters, moreover, 72.4% achievable if this coupled switching cleaner materials.

Language: Английский

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Uniform deformation distribution of structures at different seismic hazard levels using endurance time method

Structures, Journal Year: 2024, Volume and Issue: 60, P. 105836 - 105836

Published: Jan. 4, 2024

Language: Английский

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