دانلود رایگان مقاله تجزیه و تحلیل شکست اسلب بتون مسلح تحت بارگذاری ضربه با استفاده از روش عددی جدید – سال 2020
مشخصات مقاله:
عنوان فارسی مقاله:
تجزیه و تحلیل شکست اسلب بتون مسلح تحت بارگذاری ضربه با استفاده از روش عددی جدید
عنوان انگلیسی مقاله:
Failure analysis of reinforced concrete slab under impact loading using a novel numerical method
کلمات کلیدی مقاله:
بتن آرمه، بارگذاری ضربه، روش اویلری – لاگرانژی همراه، شبیه سازی عددی
مناسب برای رشته های دانشگاهی زیر:
مهندسی عمران
مناسب برای گرایش های دانشگاهی زیر:
سازه و زلزله
وضعیت مقاله انگلیسی و ترجمه:
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فهرست مطالب:
Abstract
Keywords
1. Introduction
2. Numerical method
2.1. Governing equations
2.2. Operator splitting algorithm
2.3. HJC concrete model
2.4. Multi-material interface treatment technology
3. 3D coupled Eulerian-Lagrangian method
3.1. Implementation process
3.2. Parallelization of the 3D coupled eulerian-Lagrangian method
4. Numerical simulation of projectile penetration into the concrete slab
4.1. Calculation model
4.2. Numerical results
4.3. Comparison of numerical results with the experimental data
5. Numerical simulations of projectile perforation of reinforced concrete slabs
5.1. Comparison of numerical results and experimental data
5.2. Parameter analysis
5.2.1. Effect of the initial impact velocity of the projectile on penetration performance
5.2.2. Effect of the concrete uniaxial compressive strength on penetration performance
5.2.3. Effect of the concrete slab thickness on penetration performance
6. Conclusion
Author Statement
Declaration of Competing Interest
Acknowledgment
References
قسمتی از مقاله انگلیسی:
1. Introduction
Concrete material is one of the most widely used materials in structural engineering, and has a history of application for centuries. Reinforcement bars or racks are implanted into concrete to form a sturdy construction material with enhanced compressive and tensile strength. Currently, many special engineering structures adopt concrete or reinforced concrete in civil and military applications [1–3]. Therefore, the research on projectile penetration into the reinforced concrete has received considerable attention. Failure analyses of reinforced concrete slab under impact loading are significant for an accurate evaluation of the impact resistance of structures and their design and construction [4,5]. Numerical simulations have become an important method for solving complex problems in engineering applications and scientific computing [6–8]. They play a valuable role in providing tests and examinations for theories, offering insights into complex physics, and assisting in the interpretation and the discovery of new phenomena [9,10]. In addition, numerical simulations can break through the limitations of experimental and theoretical research and can study the variation laws of the physical quantities with different initial conditions. Furthermore, it offers high efficiency with low cost than experiment approaches. Numerical simulation of projectile penetration into the reinforced concrete slab is challenging because of material large deformation, multi-material interface treatment, high pressure, high strain rate, and strong discontinuity. Coupled with an appropriate interface capturing algorithm, the Eulerian method is quite attractive for penetration problems, as it allows boundaries to flow through a fixed cell while computing the flow field on the fixed cell. However, the material deformation needs to be accurately monitored, often by using the Lagrangian method for the deformation of the reinforcing bar during the projectile penetration into the reinforced concrete slab.
