Calculation Models of the Bearing Capacity of Span Reinforced Concrete Structure Support Zones

Karpiuk, Vasyl; Syomina, Yulia A.; Antonova, D.V.

doi:10.4028/www.scientific.net/msf.968.209

Cited by 12 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Odesa State Academy of Civil Engineering and Architecture conducts systematic experimental studies [20][21][22] of bearing capacity of near-support sections of reinforced concrete beam structures under complex stresses.…”

Section: Materials Methods and Main Results Of The Study Of Basalt-mentioning

confidence: 99%

“…As a rule, experimental reinforced concrete beams with irredundant reinforcement (ρ s ≤0.003 (BpI), ρ ls ≤0.018 (A500C)) failed according to the B/M scheme [20] at static and low-cycle loads. Such failure occurred behind oblique sections under the predominant action of the bending moment because of a creep of longitudinal main reinforcement at the mouth of a dangerous oblique crack and transverse reinforcement along this crack length.…”

Section: Discussion Of the Results Obtained In The Study Of Strengthmentioning

confidence: 99%

“…Such failure occurred behind oblique sections under the predominant action of the bending moment because of a creep of longitudinal main reinforcement at the mouth of a dangerous oblique crack and transverse reinforcement along this crack length. With an increase in the quantity of transverse reinforcement ρ sw ≥0.0044, similar experimental beams with medium (a/h 0 =2) and large (a/h 0 =3) shear spans were destroyed according to the scheme C/V [20], that is, behind an oblique crack at a predominant action of transverse force because of creep of the transverse reinforcement and shear or crushing of concrete in the compressed zone above the nose of a dangerous oblique crack. At small distances between the load and the support (a/h 0 ≤1), experimental reinforced concrete beams usually failed according to the scheme D [20] behind an oblique compressed band.…”

Section: Discussion Of the Results Obtained In The Study Of Strengthmentioning

confidence: 99%

See 2 more Smart Citations

Study of strength, deformability property and crack resistance of beams with BFRP

Karpiuk¹,

Tselikova²,

Khudobych³

et al. 2020

EEJET

View full text Add to dashboard Cite

Experimental data of strength, deformability, and crack resistance of 2,000×200×100 mm reinforced concrete and basalt-concrete beams are given. Longitudinal reinforcement consisted of 2 Ø14 A500C for reinforced concrete beams and 2 Ø14 BFRP (AKB800) for basalt-concrete beams. Transverse reinforcement consisted of 2 Ø3, 4, 5 ВрI for reinforced concrete beams and 2 Ø4, 6, 8 BFRP (АКБ800) for basalt-concrete beams. Beams were made of heavy concrete of C16/20, C30/35, and C40/50 classes. The experimental beam specimens were tested according to a four-point scheme as loosely supported beams loaded with two concentrated forces. Loading in the series of tests was stepwise increasing, static and low-cycle repeated at high levels of 0.50, 0.65, and 0.80F ult. Distance from supports to concentrated forces (shear span), a/h 0 , varied within 1, 2, 3. Experimental beam specimens were made and tested according to the theory of experimental design according to the Box B4, optimal plan D. Comparative analysis of main performance parameters of reinforced concrete and basalt-concrete beams under the action of abovementioned loads was performed. The necessity of these studies was determined by the unsatisfactory convergence of experimental and calculated values of bearing capacity of oblique sections of basalt-concrete beams determined according to existing standard methods. The studies have established the influence of design factors and loading nature on basic parameters of the working capacity of basalt-concrete beam elements in a form of experimental-statistical dependences. These results will form a basis for a physical model of resistance of oblique sections in such structures to external loads. The presented results will significantly supplement the existing database of the operation of beam basalt-concrete structures and will be used in the development of an analytical method for calculating strength, deformability, and crack resistance

show abstract

Section: Materials Methods and Main Results Of The Study Of Basalt-mentioning

confidence: 99%

Section: Discussion Of the Results Obtained In The Study Of Strengthmentioning

confidence: 99%

Section: Discussion Of the Results Obtained In The Study Of Strengthmentioning

confidence: 99%

See 1 more Smart Citation

Study of strength, deformability property and crack resistance of beams with BFRP

Karpiuk¹,

Tselikova²,

Khudobych³

et al. 2020

EEJET

View full text Add to dashboard Cite

show abstract

“…The studies (Ahaieva et al, 2019;Karpiuk et al, 2019aKarpiuk et al, , 2019b) propose a possible reinforcement of the longitudinal reinforced concrete stiffeners, symmetrically on both sides of the CMS. The technological schemes of the CMS reinforcement using the external transverse stiffeners of the BridgeCor External Rib System are presented in (Contech Engineered Solutions, 2019).…”

Section: Methods For Increasing the Bearing Capacity Of Corrugated Metal Structuresmentioning

confidence: 99%

Restoration of the Bearing Capacity of Damaged Transport Constructions Made of Corrugated Metal Structures

Kovalchuk

Sysyn

Hnativ

et al. 2021

BJRBE

View full text Add to dashboard Cite

The paper deals with damages of transport constructions made of corrugated metal structures in the body of a railway track or a road during their operation. A constructive variant to restore the bearing capacity of structures was developed, which consists of installing an annular stiffening rib into the concave part of the corrugated metal profile. The main advantage of this method compared to the double corrugating method is the possibility of performing the reinforcement works during structure operation without interrupting the movement of transport vesicles. The study has proved that the reinforcement method significantly increases the carrying capacity of corrugated metal structures. A numerical finite element model was developed to determine the stress-strain state of structures made of corrugated metal structures reinforced with round stiffening ribs. The soil pressure on the corrugated shell in the model is taken into account with the application of radial and axial forces on the outer surface of the shell. It was determined that the most appropriate location of the ribs is in the centre of the building, where the reinforcement area corresponds to the width of the road or railway line. The advantage of this approach is the ability to more efficiently distribute the reinforcement material by selecting the ribs in the most loaded sections of corrugated metal structures.

show abstract

“…New concepts for the calculation of reinforced concrete structures are being developed (Pavlikov, Kochkarev & Harkara, 2019), existing methods are being improved Karpyuk, Kostyuk & Semina, 2018;Karpiuk, Somina & Antonova, 2019), including with the involvement Scientific Review -Engineering and Environmental Sciences (2021), 30 (3), 424-438 Sci. Rev.…”

Section: Introductionmentioning

confidence: 99%

Strength of eccentrically tensioned reinforced concrete structures with small eccentricities by normal sections

Dmytrenko

Yakovenko

Fesenko

2021

srees

View full text Add to dashboard Cite

It is implemented the method of normal rectangular sections slab (shell) reinforced concrete elements strength calculating with flat eccentric tensile strength using the deformation m ethod. The results of the calculation are analyzed for the case of eccentric tension with small eccentricities with varying next parameters: the height of the cross section and the reinforcement coefficient. It is investigated the character of diagrams condition change of section “N – εc(1)” at gradual change of the stress-strain state from eccentric to the central tension. It is revealed that when the eccentricity of external forces decreases, the compressed zone of concrete decreases until its complete disappearance, and at rather small values of eccentricities of force application the balance between external and internal forces cannot be found by the method of current norms. An equilibrium is found between internal and external forces only at a two-digit diagram of the distribution of relative longitudinal deformations (in the case of a compressed zone). Variants of the given problem decision without considerable loss of calculations accuracy are offered, the most expedient of which is transition to algorithm of calculation by a method of limiting efforts. It was accepted as the basic in the previous building norms. The results of numerical calculations performed in the software complex “Lira-CAD” and the corresponding mathematical modeling confirmed the rationality and allowable accuracy of further calculations by this method.

show abstract

Calculation Models of the Bearing Capacity of Span Reinforced Concrete Structure Support Zones

Cited by 12 publications

References 3 publications

Study of strength, deformability property and crack resistance of beams with BFRP

Study of strength, deformability property and crack resistance of beams with BFRP

Restoration of the Bearing Capacity of Damaged Transport Constructions Made of Corrugated Metal Structures

Strength of eccentrically tensioned reinforced concrete structures with small eccentricities by normal sections

Contact Info

Product

Resources

About