Structural performance of reinforced concrete beams subjected to combined effects of corrosion and cyclic loading

Stein, Kássio Joe; Graeff, Ângela Gaio; Garcez, Mônica Regina

doi:10.1007/s41024-022-00263-1

Cited by 5 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The primary constituent of the aforementioned salts was NaCl. The corrosion process was stimulated electrochemically by chloride ingress [ 43 ]. The chloride ion concentration for this class was set at 5% by mass.…”

Section: Accelerated Corrosion and Test Setupmentioning

confidence: 99%

Study on Shear Performance of Corroded Steel Fiber Reinforced Concrete Beams under Impact Load

Gu,

Li,

Huang

et al. 2024

Materials

View full text Add to dashboard Cite

With the growing use of steel-fiber-reinforced-concrete (SFRC) beams in environmentally friendly and rapid construction, it is essential to assess their impact performance. These beams may encounter unexpected impact loadings from accidents or terrorist attacks during service life. This study explored the impact of steel fiber content and drop hammer height on the impact load testing of corrosion-treated SFRC beams. Experiments were conducted with varying steel fiber contents (0%, 0.25%, 0.5%, 0.75%, and 1.0%), and drop hammer height (1 m, 2 m, and 3 m). The corrosion test demonstrates that SFRC beams supplemented with steel fibers showcase a diminished surface rust spot area in comparison to those lacking fibers. This improvement is ascribed to the bonding between fibers and the concrete matrix, along with their current-sharing properties. SFRC beams, subjected to impact testing, exhibit concrete crushing at the top without spalling, showcasing improved impact resistance due to increased fiber content, which reduces crack formation. Additionally, different fiber contents yield varied responses to impact loads, with higher fiber content notably enhancing overall beam performance and energy dissipation capacity. Energy dissipation analysis shows a moderate increase with higher fiber contents, and impulse impact force generally rises with fiber content, indicating improved impact resistance.

show abstract

Section: Accelerated Corrosion and Test Setupmentioning

confidence: 99%

Study on Shear Performance of Corroded Steel Fiber Reinforced Concrete Beams under Impact Load

Gu,

Li,

Huang

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Even though conventional normal-strength concrete (NC) is commonly used in civil engineering due to its comprehensive performance and low cost, previous research has demonstrated that existing conventional reinforced concrete (RC) structures are structurally deficient under both repeated loading and environmental action [1][2][3][4]. Fatigue damage to RC structures manifests itself through the propagation of cracks and increased deformation over time and has become one of the most crucial problems for conventional RC structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Wang,

Ji,

et al. 2024

Materials

View full text Add to dashboard Cite

Ultra-high-performance concrete (UHPC), a new cement-based material that offers high mechanical strength and good durability, has been widely applied in construction and rehabilitation projects in recent years. An optimum bending system is achieved by positioning the UHPC layer at the bottom tensile zone of the composite beam and placing the normal-strength concrete (NC) layer at the upper compression zone, which is described as the UHPC-NC composite beam. The fatigue behavior of reinforced UHPC-NC composite beams was described in this study, with an emphasis on the effects of UHPC layer thickness and fatigue load level on the fatigue life of the beam, deformation of the interface between UHPC and NC layers, as well as the bending stiffness of the beam. A total of 9 reinforced UHPC-NC composite beams were tested under cyclic loading. The test variables include UHPC layer thicknesses (zero, 200, and 360 mm), reinforcement ratios (1.184% and 1.786%), and the upper load levels (0.39~0.65). The results showed that good bonding had been achieved without delamination between UHPC and NC layers prior to the final fatigue failure of the beam, and the bending stiffness of the composite beam experienced a three-stage reduction under cyclic loading. Furthermore, an equation was proposed to predict the stiffness reduction coefficient of UHPC-NC composite beams under cyclic loading.

show abstract

“…Concrete structures, especially those fortifed with reinforcements, confront both localized and extensive deterioration in the face of such exigencies, their manifestation infuenced by a confuence of variables such as the magnitude of the force exerted and the inherent vibrational properties of the structure [2]. Pioneering experiments conducted on concrete elements, encompassing beams [3][4][5][6][7][8][9][10][11][12], columns [12][13][14], bridge piers [15], and slabs [16] have provided the foundational framework for comprehending the manner in which structures react to unanticipated and formidable forces [17]. Emphasizing the mechanisms of failure and resistance inherent to these components, historical studies have often adopted scaled-down replicas for pragmatic purposes, thereby facilitating practical insights into the behavior of concrete structures under duress.…”

Section: Introductionmentioning

confidence: 99%

Anti-Impact Performance Enhancement of Two-Way Spanning Slab through the Implementation of Steel Trussed Bars

Al-Dala’ien,

Anas,

Kodrg

2024

Journal of Engineering

View full text Add to dashboard Cite

Reinforced concrete (RC) slabs represent integral structural components extensively employed in architectural and infrastructural frameworks owing to their inherent robustness and longevity. In contemporary times, there has been a pronounced surge in endeavors aimed at comprehensively elucidating the anti-impact properties inherent in RC slabs. This surge is propelled by a compelling necessity to fortify these structures against the deleterious effects of low-velocity impacts, thereby ensuring their steadfastness and resilience. Consider the thorough investigation into the anti-impact characteristics of RC slabs, which has been rigorously pursued through both experimental and computational methodologies. A plethora of scholarly discourse on this topic is readily available, providing invaluable insights into the structural dynamics governing slabs subjected to low-velocity impacts. However, there is a noticeable gap in research concerning the strengthening of slabs through shear reinforcement, particularly through economical, easily fabricated, and efficient systems such as fabricated trussed bars. The primary objective of this study is to explore the structural behavior of RC slabs fortified with custom-designed trussed bars under the influence of low-velocity impacts. To accomplish this, the Abaqus software platform is explicitly employed for analysis. The slab without any shear reinforcement is experimentally tested and serves as a reference model for numerical verification. Its anti-impact performance is compared with numerical findings. Following validation, simulations are conducted for square slabs strengthened by fabricated trussed bars in orthogonal and diagonal layouts. The results demonstrate that employing fabricated truss bars shear reinforcement with a 3 mm diameter in orthogonal and diagonal layouts enhances the resistance of slabs to damage, resulting in a 28.41% and 47.06% decrease in damage, respectively. The utilization of engineered truss bars as shear reinforcement yields significant improvements in strength, rigidity, and ductility when compared to control samples lacking such reinforcement. This enhancement is particularly evident when the engineered truss bars are arranged in orthogonal and diagonal configurations.

show abstract

Structural performance of reinforced concrete beams subjected to combined effects of corrosion and cyclic loading

Cited by 5 publications

References 31 publications

Study on Shear Performance of Corroded Steel Fiber Reinforced Concrete Beams under Impact Load

Study on Shear Performance of Corroded Steel Fiber Reinforced Concrete Beams under Impact Load

Experimental Research on Fatigue Behavior of Reinforced UHPC-NC Composite Beams under Cyclic Loading

Anti-Impact Performance Enhancement of Two-Way Spanning Slab through the Implementation of Steel Trussed Bars

Contact Info

Product

Resources

About