Assessment of MC2010 and AS3600 models for estimating instantaneous flexural crack widths in fibre reinforced concrete members

2020 ◽  
Vol 208 ◽  
pp. 110271
Author(s):  
E.S. Bernard ◽  
A. Amin ◽  
R.I. Gilbert
Keyword(s):  
Reinforced Concrete ◽  
Fibre Reinforced Concrete ◽  
Concrete Members ◽  
Crack Widths

Experimental Investigation on First Crack Strength and Crack Widthof Reinforced Concrete Beamsby Side-Bonding CFRP Sheets

2011 ◽  
Vol 194-196 ◽  
pp. 1449-1452
Author(s):  
Gui Bing Li ◽  
Xiao Yan Sun ◽  
Yu Gang Guo
Keyword(s):  
Reinforced Concrete ◽  
Experimental Tests ◽  
Promising Technique ◽  
Cfrp Sheets ◽  
Concrete Members ◽  
Limit Value ◽  
Service Load ◽  
Cracking Characteristics ◽  
Design Loads ◽  
Crack Widths

Many flexural or tensile reinforced concrete members must be crack-free or the crack widths must be within specified limit value at service load levels. Presently, there are a number of structure members cannot satisfy its designed serviceability, due to the degradation of structural materials (due to durability problems) or by an increase in design loads. The use of bonding CFRP sheets on the side surfaces for strengthening or repair existing RC beamsis proposed to investigate the first crack strength and the cracking characteristics of RC beams. In order to verify the effectiveness of this application, experimental tests on six strengthened beams and one control beamhad been carried out. Experimental results demonstrated that this appears a promising technique both on improving the first crackstrength and on suppressing the crack width.

Field Testing of Concrete Members Subjected to Contact and Adjacent Blast

2015 ◽  
Vol 1106 ◽  
pp. 164-167 ◽  
Author(s):  
Radek Hajek ◽  
Martin Kovar ◽  
Marek Foglar ◽  
Jiri Pachman ◽  
Jiří Štoller
Keyword(s):  
Reinforced Concrete ◽  
Detailed Analysis ◽  
High Speed ◽  
Field Testing ◽  
Experimental Program ◽  
Fibre Reinforced Concrete ◽  
Concrete Members ◽  
Ultra High Speed ◽  
Concrete Elements

This paper follows the line of contributions from earlier conferences and informs about more results of experimental program focused on the resistance of plain and fibre reinforced concrete elements against adjacent and contact blast. Concurrently, a detailed analysis of element response is carried out using ultra high speed cameras.

Crack development in steel-fibre-reinforced concrete members with conventional rebars

2019 ◽  
Vol 71 (11) ◽  
pp. 599-610 ◽  
Author(s):  
Giuseppe Tiberti ◽  
Ivan Trabucchi ◽  
Mohammad AlHamaydeh ◽  
Fausto Minelli ◽  
Giovanni A. Plizzari
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Crack Development ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Concrete Members

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.

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