Optimizing Building Rehabilitation through Nondestructive Evaluation of Fire-Damaged Steel-Fiber-Reinforced Concrete

Sensors, Journal Year: 2024, Volume and Issue: 24(17), P. 5668 - 5668

Published: Aug. 31, 2024

Fire incidents pose significant threats to the structural integrity of reinforced concrete buildings, often necessitating comprehensive rehabilitation restore safety and functionality. Effective fire-damaged structures relies heavily on accurate damage assessment, which can be challenging with traditional invasive methods. This paper explores impact severe due fire exposure mechanical behavior steel-fiber-reinforced (SFRC) using nondestructive evaluation (NDE) techniques. After being exposed direct fire, SFRC specimens are subjected fracture testing assess their properties. NDE techniques, specifically acoustic emission (AE) ultrasonic pulse velocity (UPV), employed fire-induced damage. The primary aim this study is reveal that AE parameters—such as amplitude, cumulative hits, energy—are strongly correlated properties fire. Additionally, monitoring throughout loading application. distribution hits changes in specific parameters serve valuable indicators for differentiating between healthy thermally damaged concrete. Compared well-established relationship UPV strength bending compression, sensitivity events shows its potential situ application, providing new characterization capabilities evaluating post-fire performance SFRC. test results ability examined methods establish optimum procedure capacity members.

Language: Английский

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A parametric study on a granular micromechanics continuum-based hemivariational approach: unraveling the emergence of critical states in granular materials

Mathematics and Mechanics of Complex Systems, Journal Year: 2025, Volume and Issue: 13(1), P. 25 - 54

Published: Feb. 10, 2025

Language: Английский

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Hydroelastic analysis of partially or totally immersed Mindlin plates with a hybrid isogeometric-based approach

Mathematics and Mechanics of Solids, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

In this study, the dynamic characteristics of a cantilevered Mindlin plate, partially or totally in contact with fluid on both sides, are examined using proposed hybrid isogeometric finite element – boundary framework. The interaction problem is divided into two parts through implementation linear hydroelasticity theory, allowing for independent treatment structural and problems. part analysis, thick plate modeled as first-order shear deformable by adopting Reissner–Mindlin material assumed to be homogeneous isotropic. resulting eigenvalue then solved method (IGAFEM). second assuming ideal incorporating vacuo conditions, fluid-structure effects determined (IGABEM) terms generalized added mass coefficients. Subsequently, parametric studies various thicknesses submergence depths conducted. analysis reveals that wet natural frequencies differ noticeably from their counterparts due presence free surface fluid. addition, effect radiated waves vibrating structure included mathematical model imposing linearized condition, frequency-dependent hydrodynamic damping numerical accuracy approach verified against commercial software ANSYS, showing favourable agreement predicted corresponding mode shapes.

Language: Английский

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Multiscale investigation of debonding behavior in anisotropic graphene–polyethylene metamaterial nanocomposites

Continuum Mechanics and Thermodynamics, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Language: Английский

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From approximation of dissipative systems to representative space-time volume elements for metamaterials

Continuum Mechanics and Thermodynamics, Journal Year: 2024, Volume and Issue: 36(6), P. 1597 - 1605

Published: Aug. 2, 2024

Language: Английский

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An enhanced beam model incorporating a hysteresis-based solid friction damping mechanism for cementitious materials

Continuum Mechanics and Thermodynamics, Journal Year: 2024, Volume and Issue: 37(1)

Published: Nov. 14, 2024

Language: Английский

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A dissipation model for concrete based on an enhanced Timoshenko beam

Networks and Heterogeneous Media, Journal Year: 2024, Volume and Issue: 19(2), P. 700 - 723

Published: Jan. 1, 2024

<p>A novel Timoshenko beam model enriched to account for dissipation in cement-based materials was presented this paper. The introduced a new variable representing the relative sliding inside microcracks within material. In paper, microcrack density not supposed increase, assuming small deformation regime that implied no damage growth. utilized an expanded version of principle virtual work whose contributions came from external forces, internal elastic and due microcrack's microstructure. energy included terms related micro-macro interactions, accounting nonlinearity material behavior. Numerical simulations, conducted using finite element method, evaluated mechanical properties under three-point flexural tests compression tests. These enabled assessment dissipative behavior cyclic loading. Results showed dissipated cycles responses influenced by mechanics. Additionally, parametric study, varying friction force amplitude, revealed its impact on energy. study highlighted non-monotonic relationship between amplitude energy, with optimal value maximizing dissipation. Overall, provided insights into mechanics materials, particularly regarding dissipation, which essential understanding their structural applications.</p>

Language: Английский

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An analytical model for debonding of composite cantilever beams under point loads

Continuum Mechanics and Thermodynamics, Journal Year: 2024, Volume and Issue: 37(1)

Published: Nov. 20, 2024

Language: Английский

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