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Hybrid Reinforcement

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lightbulbAbout this topic
Hybrid reinforcement refers to the use of multiple reinforcement strategies or materials in composite structures to enhance mechanical properties, durability, and performance. This approach combines different types of reinforcements, such as fibers and particles, to optimize the material's strength, stiffness, and resistance to failure under various loading conditions.
lightbulbAbout this topic
Hybrid reinforcement refers to the use of multiple reinforcement strategies or materials in composite structures to enhance mechanical properties, durability, and performance. This approach combines different types of reinforcements, such as fibers and particles, to optimize the material's strength, stiffness, and resistance to failure under various loading conditions.

Key research themes

1. How do hybrid reinforcement strategies combining different materials or methods improve performance and learning efficiency in reinforcement contexts?

This research area explores the integration of multiple reinforcement types or strategies—be it in production control, materials engineering, or machine learning—to enhance system performance, efficiency, and adaptability. It investigates hybrid approaches that combine beneficial properties of individual reinforcement forms to address limitations like slow learning rates, mechanical weaknesses, or suboptimal resource utilization.

Key finding: The paper presents a novel evolutionary algorithm that optimizes the selection and parameter tuning of hybrid pull production-control strategies combining Kanban and Conwip. The hybrid system leverages the low inventory... Read more
Key finding: This study investigates hybrid reinforcement in aluminum nanocomposites using nano-alumina particles combined with multi-walled carbon nanotubes (MWCNTs). Results show that these hybrid reinforcements significantly reduce... Read more
Key finding: The authors propose a learned potential function for reward shaping in reinforcement learning that dynamically incorporates sequences of subgoals to accelerate policy learning. Unlike fixed hyperparameter-based potentials,... Read more
Key finding: Building on subgoal-based reward shaping, this work introduces dynamic trajectory aggregation to construct abstract states during learning based on subgoal identification, reducing designer effort in defining aggregation... Read more
Key finding: This paper proposes a hybrid training scheme mixing reinforcement learning (RL) and imitation learning (IL) that enables agents to outperform pure IL approaches and behave more human-like than agents trained solely by RL or... Read more

2. How can modulation of reinforcement parameters and signal types enhance learning and behavior modification?

This theme examines the effect of varying reinforcement parameters—such as magnitude, timing, type (positive vs. negative), and delivery methods—on learning efficiency, behavior shaping, and motivation across biological, cognitive, and computational domains. Understanding sensitivities to reinforcement variations enables the design of more effective training protocols, adaptive algorithms, and behavioral interventions.

Key finding: The study introduces a nonbinary graded reward schedule for positive reinforcement training in nonhuman primates, using varying amounts of reward to distinguish optimal from suboptimal behaviors. Experimental results show... Read more
Key finding: This research assesses individual sensitivities to reinforcement parameters—quality, magnitude, and immediacy—using arbitrary responses in participants with problem behavior. Results demonstrate that tailoring intervention by... Read more
Key finding: The authors examine the role of different functional forms of punishment signals (binary, linear, exponential) on reinforcement learning adaptive behavior. Experiments confirm that punishment signals generally slow learning... Read more
Key finding: Through experimental comparison, the study finds that accumulated reinforcement—delivering a larger reward after completing multiple responses—is as effective or superior in maintaining response rates compared to distributed... Read more
Key finding: The commentary synthesizes evidence that positive reinforcement is the most effective practice in educational behavior management but is under-utilized due to persistent myths and reliance on negative reinforcement. It... Read more

3. What methodologies enable adaptive reinforcement learning agents to effectively manage structural changes and complex dynamics in evolving environments?

This line of research focuses on advancing reinforcement learning (RL) methods to handle non-stationary tasks, environmental changes, and structural alterations in input/output spaces. It includes approaches such as transfer learning, intelligent reward shaping, and adaptive learning agents capable of coping with added or removed inputs, complex task goals, or multi-agent interactions. These methods seek to improve learning robustness, efficiency, and generalization in real-world applications.

Key finding: The paper develops a method leveraging Markov Decision Process (MDP) homomorphisms to transfer learned options (skills) from a simpler source MDP to a more complex target MDP with continuous state spaces. By representing... Read more
Key finding: This work introduces Protean Learning, a framework for RL agents to adapt dynamically to changes in input/output signatures, such as additions or deletions of sensory inputs or actuator outputs during an agent's lifetime.... Read more
Key finding: As part of reward shaping advancements, this paper presents a learned potential function that uses dynamic, partial ordering of subgoals to form abstract state spaces, enabling RL agents to better manage complex, temporally... Read more
Key finding: This comprehensive review outlines model-based and model-free RL approaches, emphasizing their use in sequential decision-making under uncertainty. It highlights temporal-difference methods, policy evaluation, and... Read more
Key finding: The paper explores the application of deep deterministic policy gradient RL algorithms to control virtually coupled trains—multiple trains acting as a convoy to reduce headway and increase railway capacity. It discusses the... Read more

All papers in Hybrid Reinforcement

The present research investigates experimentally the behavior of the reinforced concrete BCJ joint under quasi-static cyclic loads for different mount of the shear reinforcement. The specimen consisted of two columns and two beams; one is... more
This paper aims to study the flexural behavior of concrete beams reinforced with hybrid combinations of GFRP/steel bars. To this purpose an experimental program was carried out on four concrete beams reinforced with Glass Fiber Reinforced... more
The increasing utilization of Fiber-Reinforced Concrete (FRC) within the construction industry signifies a pivotal shift towards enhancing structural integrity and durability. Despite the predominant use of steel fibers, exploring macro... more
The behavior of reinforced concrete beams with biaxial and uniaxial geogrids as a partial reinforcement with traditional steel bars under flexural loads has been experimentally studied. The effect of geogrid layers with traditional steel... more
In the study, the effects of hybrid reinforcement (nano-alumina and MWCNT) and heat treatment on the wear behavior of the Al-4Cu nanocomposites were investigated under dry sliding condition against W-6Co ball by means of a ball-on-disk... more
e increase in demand for thermoplastics as a lightweight material for automobile application and other commercial purposes prompts more research into the available polymer resources. In this research, the possibility of enhancing the... more
Author's declaration I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically... more
A substantial amount of work was carried out on the use of fiber-reinforced polymer (FRP) in reinforcing concrete structural elements, which demonstrated considerable inelasticity or deformity through monotonous and fatigue loads. Even... more
This research investigates the behavior of RC beam column joints reinforced with steel sections. The study deals with the strengthening of RC joints by different steel sections. The investigation included a theoretical analysis through a... more
Low-density polyethylene is a vastly used engineering material owing to its low cost, high formability, recyclability, relative availability and the possibility of improving its properties when reinforced/filled with other materials.... more
Using the super elastic materials in structures design is becoming very important   in the research field because of their rare ability in sensing the around effect and reacting against the mechanical and thermal react. The major intent... more
The present research investigates experimentally the behavior of the reinforced concrete BCJ joint under quasi-static cyclic loads for different mount of the shear reinforcement. The specimen consisted of two columns and two beams; one is... more
To investigate the serviceability performance of High-Strength Concrete (HSC) beams, 12 beams (L=2 m, b=0.2 m, h=0.3 m and shear span to depth ratio of 1.8) with different ratios of ρ and ρ' (percentage of tensile and compressive steel)... more
The structural rehabilitation of reinforced lightweight aggregate concrete beams in shear was studied with resin injection. A series of model beams, reinforced in shear, were loaded in the laboratory until failure, repair and again loaded... more
The failure behavior of reinforced concrete beam structural elements was modeled using computer software, ANSYS, to create the study presented in this paper. This study's goal was to ascertain how lower concrete and steel quality affected... more
Many concrete bridges may be associated to a simple thick slabs structural system. With the increase in traffic loads and material degradation, some of these structures need to be strengthened in shear. The goal of this research is to... more
Beam and column where bisect is called as joint or link. The act of beam-column joints have long been recognized as a significant factor that affects the overall behaviour of Reinforced Concrete framed structures subjected to large... more
Solid particle erosion is usually undesirable, as it leads to development of cracks and holes, material removal and other degradation mechanisms that as final consequence reduce the durability of the structure imposed to erosion. The main... more
This paper discusses structural behaviour of hybrid precast concrete column under static loading. Comparison between the hybrids precast concrete and ordinary cast in-situ concrete columns are also discussed. The column and sandwich... more
In this work, the effect of hybridizing micro-Ti with nano-SiC particulates on the microstructural and the mechanical behaviour of Mg-5.6Ti composite were investigated. Mg materials containing micron-sized Ti particulates hybridized with... more
Elevated concrete slabs are typically used as columns/piles supported floors in multi-story buildings or industrial facilities. The need to reduce construction time and costs has favoured the use of ever more advanced materials, like... more
One of the main purposes of this research is to control environmental pollution and mitigate the impact of ignorantly discarded waste plastics in the environment through recycling of such plastics and using them to develop innovative... more
Reinforced concrete (R/C) beams tend to elongate after flexural cracking and yielding; however, in an R/C moment frame, the beam growth is restrained by the surrounding structural components such as the columns and cast-in-place floor... more
The present study includes an experimental investigation of the behavior of simply supported lightweight aggregate concrete (LWAC) and normal weight concrete (NWC) square slabs reinforced by different ratios of carbon fiber reinforced... more
In this paper, the behavior of interior steel fiber reinforced concrete beam – column joints (BCJs) under cyclic loading is investigated. An experimental program including tests on twelve reinforced concrete (BCJs) specimens under cyclic... more
The present study includes an experimental investigation of the behavior of simply supported lightweight aggregate concrete (LWAC) and normal weight concrete (NWC) square slabs reinforced by different ratios of carbon fiber reinforced... more
A study for the continuous composite steel-reactive powder concrete beams under repeated loads were executed experimentally and analytically. In the experimental part, six continuous composite sections were constructed as test beams.... more
Beam-column joints play a crucial role in the structural behaviour of framed structures. Use of highly ductile material and addition of steel fibres to concrete will enhance the seismic resistance of beam-column joints. It has been... more
The focus of this paper is to investigate the effect of column axial load levels on the performance of shear deficient reinforced concrete beam column joints (BCJs) under monotonic and cyclic loading. The problem of interaction between... more
In this paper, the behavior of interior steel fiber reinforced concrete beam – column joints (BCJs) under cyclic loading is investigated. An experimental program including tests on twelve reinforced concrete (BCJs) specimens under cyclic... more
The behavior of deep beams is significantly different from shallow beams, the reinforced concrete plane section does not remain plane after deformation. The utilization of fiber reinforced polymer, (FRP) and self-compacted concrete in the... more
The recent seismic events in Saudi Arabia in the Western and Eastern Region, have led to concerns about safety and vulnerability of reinforced concrete buildings, which were designed only for gravity loads in the past, devoid of any... more
The macro mechanical strength and microstructures were conducted. Combined fiber-reinforced effect was obvious in the cemented tailings backfill (CTB). The fiber has a positive effect on improving the flexural strength of CTB.
Reinforced concrete moment resisting structures everywhere throughout the world is in necessity of quick actions for overhauling their execution level to survive the seismic loading impacts. Failure of beam column junctions are identified... more
A relatively new solution for overcoming corrosion of steel in concrete is the use of fiber-reinforced polymer material as a cost-effective alternative to replacing traditional methods and materials. This study has been carried out on a... more
Finite element modeling of reinforced concrete interior column-slab joints with and without shear reinforcement, as well as analysis of shear stress fields in the middle layer of the concrete plate were performed using STAAD.ProV8i. For... more
Finite element modeling of reinforced concrete interior column-slab joints with and without shear reinforcement, as well as analysis of shear stress fields in the middle layer of the concrete plate were performed using STAAD.ProV8i. For... more
The main aim of the present study is to give an answer to the question whether the transverse reinforcement, which is required for the shear resistance of columns, must be added to the one required for the cross section confinement, or it... more
This paper presents an implementation of a three-dimensional nonlinear finite element model for evaluating the behavior of reinforced concrete slabs under centric load. The concrete was idealized by using eight-nodded solid elements.... more
The Technology of precast concrete growing rapidly. The concrere research has been aimed to create an innovation simplify and to reduce weaknesses of concrete include precast concrete. This study aims to research the connection of precast... more
Steel fiber reinforced concrete (SFRC) is being used in the construction industries for decades for their improved flexural strength, direct tensile strength, fatigue strength, shear and torsional strength, shock resistance, ductility and... more
The present study includes an experimental investigation of the behavior of simply supported lightweight aggregate concrete (LWAC) and normal weight concrete (NWC) square slabs reinforced by different ratios of carbon fiber reinforced... more
The Technology of precast concrete growing rapidly. The concrere research has been aimed to create an innovation simplify and to reduce weaknesses of concrete include precast concrete. This study aims to research the connection of precast... more
This paper is an attempt to simulate the CFRP strengthened RC beams using a software package ANSYS to attain the experimental results which were achieved by different researchers with same target parameters. The first parameter is to... more
Coupling beam is a link beam that connects two shear walls as the key factor that determines the behavior of the shear wall. A number of previous studies on coupling beam have concluded that several factors cause failure or collapse in... more
FRP bars have been adopted as internal reinforcement of concrete slabs, beams and columns increasing their service life in unfavourable conditions. FRP bars are more corrosion resistant than steel bars and shows good resistance to fatigue... more
Bamboo has high tensile strength, so it can use for concrete construction, especially for simple construction. Bamboo has the slippery surface causes the cracks on Bamboo Reinforced Concrete (BRC) beam not to spread and yield slip failure... more
The behavior of sixteen reinforced concrete composite one way simply supported pre slabs and four monolithic reinforced concrete one way simply supported slabs were studied to investigate the behavior of recycled aggregate reinforced... more
Various methods were developed to increase the flexural capacity of reinforced concrete beams. One of method possibility method is by using truss system reinforcement. Therefore, this study aims to analyze the effect of spacing of steel... more
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