Optimization of reinforced concrete beams under local mechanical and corrosive damage

Tamrazyan, Ashot; Alekseytsev, Anatoly

doi:10.1080/0305215x.2022.2134356

Cited by 12 publications

(6 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elements with the lowest safety margins are to be unified; their characteristics will be improved to ensure safety. Unification conditions imply the same cross-sections for a group of structural elements [43].…”

Section: Discussion and Prospects For Further Researchmentioning

confidence: 99%

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Alekseytsev

2023

Buildings

Self Cite

View full text Add to dashboard Cite

The article addresses the problem of safety evaluation of steel moment frames of civil buildings, e.g., warehouses, shops, garages, and multistory industrial buildings on deformable soil in the relevant case of an emergency impact. The case of accidental emergency impacts is considered when such parameters as the point, direction, and intensity of an impact cannot be predetermined. Such impacts are not expected to trigger the progressive collapse of currently implemented design solutions and the whole structure must maintain the property of survivability. To evaluate this property, several calculations are to be made in the quasi-static statement to identify the stress–strain state under the most dangerous accidental impacts. Further, final calculations are to be made in the dynamic statement. In this case, the problem of search is solved using the criterion of minimizing the integral safety margin of structural elements in a steel moment frame design. Calculations prevent the frame stability loss. The calculation is performed in the quasi-static statement using models made in compliance with the deformation theory of plasticity, while the calculation in the dynamic statement takes into account the associated plastic flow rule. The proposed procedures allow for designing steel moment frames that are resistant to accidental emergency impacts. Impact loading is analysed as pulse loading, which is statically equivalent to the dynamic effect of an inelastic impact of a stiff body on a structural system. The design and the efficiency evaluation of a steel moment frame of a two-story building are considered.

show abstract

Section: Discussion and Prospects For Further Researchmentioning

confidence: 99%

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Alekseytsev

2023

Buildings

Self Cite

View full text Add to dashboard Cite

show abstract

“…These “hybrid” fiber blends were investigated for mechanical properties and durability. Moreover, Tamrazyan and Alekseytsev [ 15 ] looked to optimize reinforced concrete buildings using multiple criteria. The potential for both natural disasters and accidental harm caused by humans is factored into the latest optimality standards.…”

Section: Introductionmentioning

confidence: 99%

Limited Optimal Plastic Behavior of RC Beams Strengthened by Carbon Fiber Polymers Using Reliability-Based Design

Ibrahim

Rad

2023

Polymers

View full text Add to dashboard Cite

The plastic behavior of strengthened haunched beams utilizing carbon fiber-reinforced polymers (CFRP) was investigated using a probabilistic design that took into account random concrete properties, CFRP properties, and complementary strain energy values, with the reliability index serving as a limiting index, as the proposed method considers a novel method that deals with probabilistic parameters for models with limited plastic behavior designed based on the reliability index. The data used in this research were gathered and evaluated in a recent study on simply supported haunched beams reinforced with carbon fiber-reinforced polymers. The purpose of this research was to use the reliability limitation index for simulated strengthened haunched beams by taking into account randomness in concrete and CFRP properties and the complementary strain energy value, which is considered a plastic behavior controller that provides an illustration of the damage amount within the reinforcement steel bars. The results indicate how randomness affects the behavior of the presented models, which are chosen to have different numbers of CFRP strips. The variable randomness affects load and deflection values where the reliability index value increases as the corresponding load value decrease, reflecting the increased probability of failure in models subjected to higher loading conditions, while tension concrete damage percentages are reflected in the damage pattern presented in the results, showing that as the produced load increases, so does the damage intensity. It is also obvious that the reliability index served as a limitation index while taking concrete characteristics and complementary strain energy as random variables.

show abstract

“…Since the large number of factors effects on the development of non-equilibrium corrosion processes in reinforced concrete structural members exposed to aggressive medium, as well as the they are of largely random nature over time. Tamrazyan et al [16] considered the resistance of reinforced concrete elements damaged with corrosion from the point of view of risk assessment. They provided proposals for optimizing design solutions, taking into account the acquisition of defects and corrosion damage.…”

Section: Introductionmentioning

confidence: 99%

Exposure of the load capacity of the RC structural system under corrosion damage to columns

Kolchunov

Savin

2023

J Appl Eng Science

View full text Add to dashboard Cite

A number of accidents, such as the partial collapse of a residential building in Surfside on June 24, 2021, or the collapse of the roof structure of Basmanny Market in Moscow on February 23, 2006, show that aggressive medium impacts on reinforced concrete structures lead over time to a decrease in their strength resistance resource under accidental impacts. At the same time, the investigations in this field mainly deal with structural members under bending, while eccentrically compressed and corroded reinforced concrete members have been considered either in particular aspects or the obtained solutions are rather complicated for their practical application. In this regard, the purpose of the article was to assess the influence of the corroded depth on the load capacity of eccentrically compressed reinforced concrete columns of structural frames, as well as to predict the time of exhaustion of their load capacity under constant serviceable loads. The paper adopted the phenomenological model of V.M. Bondarenko to take into account long-term corrosion processes. It had been established that an increase in the corroded depth leads to a decrease in the load capacity of eccentrically compressed reinforced concrete members due to a decrease in the effective cross-sectional depth and effective slenderness ratio. The relative depth of the destroyed concrete varies depending on the current stress-strain state of the structural member. The time to reach the critical corroded depth depends significantly on the parameters of aggressive medium and the stress-strain state of the structural member and may differ by several times when implementing avalanche or descending damage kinetics.

show abstract

Optimization of reinforced concrete beams under local mechanical and corrosive damage

Cited by 12 publications

References 35 publications

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Ensuring the Safety of Steel Moment Frames Subjected to Uncertain Impacts

Limited Optimal Plastic Behavior of RC Beams Strengthened by Carbon Fiber Polymers Using Reliability-Based Design

Exposure of the load capacity of the RC structural system under corrosion damage to columns

Contact Info

Product

Resources

About