Stresses and cracking in reinforced concrete members under axial tension

1971 ◽  
Vol 4 (5) ◽  
pp. 313-322
Author(s):  
V. A. Yerlici
Keyword(s):  
Reinforced Concrete ◽  
Concrete Members ◽  
Axial Tension

scholarly journals STRESS-STRAIN RESPONSE OF REINFORCED CONCRETE MEMBER SUBJECTED TO AXIAL TENSION

2007 ◽  
Vol 13 (2) ◽  
pp. 109-113 ◽  
Author(s):  
Rokas Girdžius ◽  
Gintaris Kaklauskas ◽  
Renata Zamblauskaitė
Keyword(s):  
Reinforced Concrete ◽  
Numerical Test ◽  
Strain Response ◽  
Concrete Member ◽  
Tension Stiffening ◽  
Concrete Members ◽  
Axial Tension ◽  
Reinforced Concrete Member ◽  
Relationship Of ◽  
Concrete Reinforcement

This paper discusses the load and deflection relationship of reinforced concrete members subjected to axial tension. A new tension stiffening relationship depending on tensile strength of concrete, reinforcement ratio, and the ratio of modulus of elesticity of steel and concrete has been proposed. The results obtained were compared with the numerical test data and the formulas proposed by other authors.

Transverse reinforcement effect on cracking behaviour of R.C. members

1983 ◽  
Vol 10 (4) ◽  
pp. 566-581 ◽  
Author(s):  
S. H. Rizkalla ◽  
L. S. Hwang ◽  
M. El Shahawi
Keyword(s):  
Reinforced Concrete ◽  
Uniaxial Tension ◽  
Crack Width ◽  
Crack Spacing ◽  
Experimental Program ◽  
Transverse Reinforcement ◽  
Reinforcement Effect ◽  
Concrete Members ◽  
Axial Tension ◽  
Final Crack

Two extensive and independent experimental programs have been conducted to study the cracking behaviour of reinforced concrete members subjected to pure tension in the presence of transverse reinforcement. The first program involved the testing of eighteen reinforced concrete segments and was mainly designed to examine the applicability of the existing equations for predicting crack spacings and widths. The segments were reinforced in two directions and loaded in uniaxial tension beyond the yield stress of the steel. The measured average values of the final crack spacings were compared to the values presented by other researchers. Based on this comparison, a simplified and refined expression for prediction of crack spacing is proposed.The second experimental program involved the testing of sixteen reinforced concrete segments, which were divided into two groups with different concrete covers. Within each group, all segments were identical in all parameters, except the spacing of transverse reinforcement. The program was designed to study the influence of transverse reinforcement spacing on crack behaviour. A methodology including proposed expression for predicting the crack spacing in reinforced concrete members subjected to axial tension with variable transverse reinforcement spacing is presented. Keywords: cracking, crack spacing, crack width, membrane forces, reinforced concrete, tension, transverse reinforcement.

Effects of shrinkage on tension stiffening and cracking in reinforced concrete

2001 ◽  
Vol 28 (3) ◽  
pp. 363-374 ◽  
Author(s):  
Peter H Bischoff
Keyword(s):  
Reinforced Concrete ◽  
Shrinkage Strain ◽  
Shrinkage Stress ◽  
Strain Response ◽  
Stress Strain ◽  
Tension Stiffening ◽  
Concrete Members ◽  
Axial Tension ◽  
Tension Member ◽  
Crack Widths

Basic concepts of tension stiffening behaviour of reinforced concrete members under tension are reviewed, and different approaches to account for this behaviour are linked together. This includes a "load sharing" approach, where the average load carried by the cracked concrete is used to determine the post-cracking stress–strain response of concrete in tension, and a "tension stiffening strain" approach, which evaluates changes in member stiffness to obtain a reduction in member deformation by including the stiffening effect of the tension carried by concrete between cracks. Shrinkage strains are then included in an analysis of tension stiffening and the results of this analysis are validated with experimental data. The experimental study was carried out for symmetrically reinforced axial tension members having reinforcing percentages between 1% and 2% and shrinkage strain values up to 230 µε. Failure to account for initial member shortening caused by shrinkage leads to an apparent reduction in tension stiffening, which becomes more predominant as the percentage of reinforcement increases. Corrected results indicate that tension stiffening is independent of the reinforcing steel ratio, ρ (within the studied field for 1% < ρ < 2%) and continues to decrease during loading after cracking has stabilized. Test results are also compared with a number of proposals made by other researchers in the past. Prediction of crack widths based on results from axial tension member tests is not significantly affected by shrinkage.Key words: bond, cracking, crack widths, reinforced concrete, shrinkage, stress-strain response, tension, tension stiffening.

scholarly journals Uniaxial Bond Stress-Slip Relationship of Reinforcing Bars in Concrete

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Sungnam Hong ◽  
Sun-Kyu Park
Keyword(s):  
Reinforced Concrete ◽  
Bond Stress ◽  
Analytical Models ◽  
Cross Sectional ◽  
Concrete Members ◽  
Axial Tension ◽  
Analytical Results ◽  
Proposed Model ◽  
Relationship Of ◽  
Tension Loading

This paper documents a study carried out on the estimation of the bond stress-slip relationship for reinforced concrete members under axial tension loading. An analytical model is proposed that utilizes the conventional bond stress-slip theories as well as the characteristics of deformed bar and concrete cross-sectional area. An equation for the estimation of the bond stress is formulated as the function of nondimensional factors (e.g., bond stress, slip, etc.). The validity, accuracy, and efficiency of the proposed model are established by comparing the analytical results with the experimental data and the JSCE design codes, as well as the analytical models given by Ikki et al. and Shima. The analytical results presented in this paper indicate that the proposed model can effectively estimate the bond stress-slip relationship of reinforced concrete members under axial tension loading.

Methodology of studying the mechanical properties of composite materials (reinforced concrete)

2018 ◽  
Vol 84 (12) ◽  
pp. 61-67
Author(s):  
V. A. Eryshev
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Experimental Studies ◽  
Analytical Relationship ◽  
Hardened Concrete ◽  
Deformation Model ◽  
Joint Work ◽  
Concrete Shrinkage ◽  
Axial Tension ◽  
Tension And Compression

The mechanical properties of a complex composite material formed by steel and hardened concrete, are studied. A technique of operative quality control of new credible concrete and reinforcement, both in laboratory and field conditions is developed for determination of the strength and strain characteristics of materials, as well as cohesion forces determining their joint operation under load. The design of the mobile unit is presented. The unit provides a possibility of changing the direction of loading and testing the reinforced element of the given shape both for tension and compression. Moreover, the nomenclature of testing equipment and the number of molds for manufacturing concrete samples substantially decrease. Using the values of forcing resulting in concrete cracking when the joint work of concrete and reinforcement is disrupted the values of the inherent stresses and strains attributed to the concrete shrinkage are determined. An analytical relationship between the forces and deformations of the reinforced concrete sample with central reinforcement is derived for axial tension and compression, with allowance for strains and stresses in the reinforcement and concrete resulted from concrete shrinkage. The results of experimental studies are presented, including tension diagrams and diagrams of developing axial deformations with an increase in the load under the central loading of the reinforced elements. A methodology of accounting for stresses and deformations resulted from concrete shrinkage is developed. The applicability of the derived analytical relationships between stresses and deformations on the material diagrams to calculations of the reinforced concrete structures in the framework of the deformation model is estimated.

scholarly journals Fiber type influence on the reinforced concrete under axial tension

2021 ◽  
Vol 1162 (1) ◽  
pp. 012016
Author(s):  
M Surianinov ◽  
D Kirichenko ◽  
I Korneieva ◽  
S Neutov
Keyword(s):  
Reinforced Concrete ◽  
Fiber Type ◽  
Axial Tension
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