Crack formation of steel reinforced concrete structure under stress in construction period

Zhu, Hongping

doi:10.3221/igf-esis.36.19

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…При деформировании железобетонной балки происходит образование трещин в растянутой зоне. Появление трещины можно представить как мгновенный разрыв бетона, который приводит к возникновению упругих волн в бетоне и колебательному движению балки [1,2,3,4,5,6,7,8,9,10]. Динамические процессы, инициированные появлением трещин в бетоне, оказывают влияние на развитие существующих трещин и приводят к появлению новых трещин.…”

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Experimental Investigation of Deflected Mode of the Rienforced Concrete Beams With Organized Cracks Under Long-Term Loading

Чхум¹

2018

Vestn. SibADI

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Introduction. Evaluation of the influence level of the pre-organized cracks in tensile zone of the reinforced concrete beams on their crack resistance, deformability under long-term loading is investigated in the article.Materials and methods. Concrete for specimen was produced in laboratory and factory on portland cement of the 500-grade at W/C=0,71; concrete composition 1:1,9:4 (by weight); strength of cube at 28th days – 13,85 MPa; strength of prism with dimensions 10/10*40 cm – 11,48 MPa; span calculation – 78 cm; steel rebar grade – A400 with diameter of 10 mm. Organized crack was formed by installing plate with thickness of 0,5 mm and height of 30 mm on the rebar in the zone of maximum moments.Results. The experiments confirmed the hypothesis about the beams rigidity with pre-organized cracks in comparison with stochastic cracks under the influence of long-term loading. As a result, the beams with pre-organized cracks provide the smaller deflection after long-term period than the beams without organized cracks. Thus, the proposed method of the deflections calculation of the reinforced concrete beams with pre-organized cracks under the long-term loading helps to reduce deflection to 33%.Discussion and conclusion. The findings of this study suggest that the presence of pre-organized cracks reduces the beams deflections in comparison with the specimens of section, and such method actually regulates the stress-strain state of reinforced concrete structures and leads to the smooth deformation at all stages under the influence of long-term loading.

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Section: Introductionunclassified

Experimental Investigation of Deflected Mode of the Rienforced Concrete Beams With Organized Cracks Under Long-Term Loading

Чхум¹

2018

Vestn. SibADI

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The Foundations with Composite Reinforcing Various Types Work Analysis

Subbotin

Shagina

Skibin

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The article deals with the composite reinforcement use in the foundations’ construction under difficult geological conditions and aggressive groundwater. The pile foundation of a two-story cottage was calculated using two types of reinforcement in the pile cap: traditional metal reinforcement and composite fiberglass. The modern regulatory documents requirements governing the calculation of structures with composite reinforcement were taken into account. The use composite reinforcement has been revealed not to give a significant advantage in the pile foundations cost, it is effective when the structure is used in aggressive environments: the resistance of fiberglass reinforcement plays a crucial role in combination with special concretes.

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Regression dependences in bending reinforced concrete beam with cracks

Nuguzhinov

Bakirov

Zholmagambetov

et al. 2022

Curved and Layered Structures

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The work is devoted to determining the stress parameters of flexible reinforced concrete beams with cracks. The problem is solved using LIRA-SAPR using beam finite elements, taking into account the nonlinear relationship between deformation and stress in concrete. In the course of solution, a step-by-step loading method is used with the use of an iterative process at each step. To obtain the dependence of the stress parameters on varied factors, a rational planning matrix for a multifactor computer simulation was compiled to determine the stress parameters in bent rectangular reinforced concrete beams with a crack. According to this plan, computer simulations were conducted for concrete beams of C20/25 and B32/40 class. The obtained dependences enable to evaluate the operability of the considered structural elements for both groups of limiting states. They can be used to determine the parameters of fracture mechanics and evaluate the crack resistance of a beam.

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Crack formation of steel reinforced concrete structure under stress in construction period

Cited by 3 publications

References 24 publications

Experimental Investigation of Deflected Mode of the Rienforced Concrete Beams With Organized Cracks Under Long-Term Loading

Experimental Investigation of Deflected Mode of the Rienforced Concrete Beams With Organized Cracks Under Long-Term Loading

The Foundations with Composite Reinforcing Various Types Work Analysis

Regression dependences in bending reinforced concrete beam with cracks

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