Calculation of a Compressed Reinforced Concrete Element with a Circular Cross Section Using a Three-Line Concrete Compression Scheme

2021 ◽  
pp. 155-161
Author(s):  
Ulviye Hajiyeva Mukhlis kizi
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Circular Cross Section ◽  
Concrete Element ◽  
Compression Scheme

scholarly journals Guided Wave Propagation in Detection of Partial Circumferential Debonding in Concrete Structures

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2199 ◽  
Author(s):  
Beata Zima
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Wave Velocity ◽  
Guided Waves ◽  
Concrete Structures ◽  
Circular Cross Section ◽  
Guided Wave ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Average Wave

The following article presents results of investigating the damage detection in reinforced concrete beams with artificially introduced debonding between the rod and cover, using a non-destructive method based on elastic waves propagation. The primary aim of the research was to analyze the possible use of guided waves in partial circumferential debonding detection. Guided waves were excited and registered in reinforced concrete specimens with varying extents of debonding damage by piezoelectric sensors attached at both ends of the beams. Experimental results in the form of time–domain signals registered for variable extent of debonding were compared, and the relationships relating to the damage size and time of flight and average wave velocity were proposed. The experimental results were compared with theoretical predictions based on dispersion curves traced for the free rod of circular cross-section and rectangular reinforced concrete cross-section. The high agreement of theoretical and experimental data proved that the proposed method, taking advantage of average wave velocity, can be efficiently used for assessing debonding size in reinforced concrete structures. It was shown that the development of damage size in circumferential direction has a completely different impact on wave velocity than development of debonding length. The article contains a continuation of work previously conducted on the detection of delamination in concrete structures. The proposed relationship is the next essential step for developing a diagnostics method for detecting debondings of any size and orientation.

STRESS-STRAIN STATE OF ECCENTRICALLY COMPRESSED REINFORCED CONCRETE COLUMNS OF CIRCULAR CROSS-SECTION

2018 ◽  
Vol 8 (1) ◽  
pp. 4-9
Author(s):  
Sergey S. MORDOVSKY ◽  
Rustam I. DAVLIKAMOV
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Nonlinear Deformation ◽  
Strain State ◽  
Circular Cross Section ◽  
Concrete Columns ◽  
Deformation Model ◽  
Stress Strain ◽  
Reinforced Concrete Columns ◽  
Nonlinear Deformation Model

Theoretical studies of reinforced concrete eccentrically compressed columns of circular cross-section on strength indexes are analyzed. These studies rely on the use of a nonlinear deformation model that approximates the work of concrete to real experimental conditions. A comparative analysis of the results of calculating the strength of reinforced concrete columns of circular cross-section is carried out according to the methodology proposed in the current set of rules, is the author’s program for determining the stress-strain state of a reinforced concrete column of circular cross-section implemented in the MathCad software environment. The results of a numerical experiment are compared in the form of a fi nite-element model in the Lira-CAD program complex using a nonlinear deformation model. Calculations and schemes are given taking into account the possibility of conducting an experimental study.

scholarly journals Shear and Flexural Capacity of Reinforced Concrete Members with Circular Cross Section

2017 ◽  
Vol 171 ◽  
pp. 957-964 ◽  
Author(s):  
Rendy Thamrin ◽  
Ruddy Kurniawan ◽  
Annisa Prita Melinda
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Circular Cross Section ◽  
Flexural Capacity ◽  
Concrete Members

Shear strength of heavily reinforced concrete members with circular cross section

2010 ◽  
Vol 32 (3) ◽  
pp. 617-626 ◽  
Author(s):  
Uffe G. Jensen ◽  
Linh C. Hoang ◽  
Henrik B. Joergensen ◽  
Lars S. Fabrin
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Circular Cross Section ◽  
Concrete Members

scholarly journals BENDING WITH TORSION OF FIBER REINFORCED CONCRETE BEAM OF CIRCULAR CROSS SECTION

2021 ◽  
Vol 17 (3) ◽  
pp. 173-181
Author(s):  
Sergey Bulkin
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
High Strength Steel ◽  
Circular Cross Section ◽  
High Strength ◽  
Reinforced Concrete Beam ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Design Parameters ◽  
The Moment

The article provides information about the tests of circle cross-section reinforced concrete beams made of high-strength steel-fiberconcrete on combined torsion and bending. Given information contains the main results: a diagram of the cracks with an indication of their opening width, the values of support reactions at the moment of cracking and at the moment before destruction. It was found that as the load is applied in beams made of high-strength steel-reinforced concrete, in the case of several cracks at the firststage, there is one crack increases. The beams are modeled in the design complex and given description of the main design parameters. The results of the calculation are presented and a comparative analysis of the results obtained with the experiments results. It is noted that the adopted models in the computational complexes require the development of subroutines and refinement

scholarly journals Behavior of an Internally Confined Hollow Reinforced Concrete Column with a Polygonal Cross-Section

2021 ◽  
Vol 11 (9) ◽  
pp. 4302
Author(s):  
Sungwon Kim ◽  
Hyemin Hong ◽  
Taek Hee Han
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Circular Cross Section ◽  
Material Model ◽  
Maximum Load ◽  
Lateral Force ◽  
Analysis Model ◽  
Reinforced Concrete Column ◽  
The Difference ◽  
Saving Effect

The new supporting structure, internally confined hollow reinforced concrete (ICH RC), was suggested by former researchers. It maintains the material saving effect, which is the advantage of the hollow concrete structure, and it solves the brittle fracture problem of the inner wall by the inner steel pipe to make it into the 3-axis confinement state. However, until now, its design and analysis model has been limited to a circular cross-section. In this study, to expand the applicability, research and development of an ICH RC structure with a polygonal cross-section were performed. The material model was developed by defining the constraint stress in the members of the concrete and deriving a reasonable stress-strain relationship. For the column model, it was developed to predict the behavior of the polygonal ICH RC columns by analyzing the axial force-moment correlation, moment-curvature, and lateral force-displacement relationship. Each model was verified not only by comparing with the results of previous experiments but also by analyzing the results according to parameters. The maximum load and ultimate displacement values through the developed model showed the difference with the experimental results within 6% of mean error. It was verified that the proposed analytical model reasonably reflects the behavior of actual columns.

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