Combined effects of strain gradient and concrete strength on flexural strength and ductility design of RC beams and columns

2014 ◽  
Author(s):  
Mantai Chen
Keyword(s):  
Flexural Strength ◽  
Strain Gradient ◽  
Concrete Strength ◽  
Combined Effects ◽  
Rc Beams ◽  
Strength And Ductility

Flexural ductility of reinforced concrete beams with lap-spliced bars

2014 ◽  
Vol 41 (7) ◽  
pp. 594-604 ◽  
Author(s):  
Mehrollah Rakhshanimehr ◽  
M. Reza Esfahani ◽  
M. Reza Kianoush ◽  
B. Ali Mohammadzadeh ◽  
S. Roohollah Mousavi
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
Concrete Beams ◽  
Concrete Strength ◽  
Reinforced Concrete Beams ◽  
Transverse Reinforcement ◽  
Rc Beams ◽  
Flexural Ductility ◽  
Ductility Ratio ◽  
Strength And Ductility

In this paper, the flexural ductility of lap-spliced reinforced concrete (RC) beams is experimentally investigated. Twenty-four specimens were designed and manufactured for laboratory experiments. Concrete compressive strength, amount of transverse reinforcement over the splice length, and the diameter of longitudinal bars were selected as the main variables. The ductility of tested specimens is evaluated based on a previously defined ductility ratio. Results show that concrete strength and amount of transverse reinforcement over the splice have major effects on ductility. With an appropriate amount of transverse reinforcement, a satisfactory ductility response for different concrete strengths can be obtained. The CSA-A23.3-04 Standard provisions on bond strength and ductility of lap-spliced RC beams are evaluated and discussed. This study shows that the provisions in predicting the bond strength of lap-spliced concrete beams are adequate but may not achieve a satisfactory performance for ductility. An equation is proposed to achieve the appropriate ductility.

scholarly journals Experimental Study of the Flexural Strength and Ductility of Post Burned Steel Fiber RC Beams

2019 ◽  
Vol 10 (2) ◽  
pp. 428
Author(s):  
Antonius Antonius ◽  
Purwanto Purwanto ◽  
Primasiwi Harprastanti
Keyword(s):  
Experimental Study ◽  
Flexural Strength ◽  
Steel Fiber ◽  
Rc Beams ◽  
Strength And Ductility

Use of waste foundry sand as fine aggregates for structural concrete – A review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Manjunatha M. ◽  
Rakshith S.G.K.
Keyword(s):  
Literature Review ◽  
Flexural Strength ◽  
Concrete Strength ◽  
Strength Properties ◽  
Flexural Behavior ◽  
Rc Beams ◽  
Structural Concrete ◽  
Foundry Sand ◽  
Content Type ◽  
Waste Foundry Sand

Purpose Waste foundry sand (WFS) is a by-product of the metal casting industries and is used for land filling purposes. Disposing of waste creates problems to environment and increases disposal values. To reduce environmental pollutions and solving disposal problems, several authors in worldwide are carried out research work by partial and complete replacing of natural sand with WFS in concrete mixtures. It is found that WFS can be used for production of structural grade concrete. The mechanical characteristics and flexural properties of RC beams has been reviewed in this paper. From this literature review, it has been noticed that there are improvements in concrete strength properties with WFS. Design/methodology/approach The results of various properties of concrete have been discussed in this review articles such as compressive strength, split tensile strength, flexural strength, modulus of elasticity, SEM micro-structures and flexural strength properties of RC beams. Findings From the literature review, it is found that there is gap of research on flexural behavior of reinforced concrete beam with WFS. Originality/value By using WFS effectively, the environmental pollutions and dumping of waste can be reduced. WFS can be successfully used in structural concrete members.

scholarly journals The Mechanical Properties of Steel-Polypropylene Fibre Composites Concrete (HyFRCC)

2015 ◽  
Vol 773-774 ◽  
pp. 949-953 ◽  
Author(s):  
Izni Syahrizal Ibrahim ◽  
Wan Amizah Wan Jusoh ◽  
Abdul Rahman Mohd Sam ◽  
Nur Ain Mustapa ◽  
Sk Muiz Sk Abdul Razak
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Volume Fraction ◽  
Concrete Strength ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Polypropylene Fibre ◽  
Experimental Results

This paper discusses the experimental results on the mechanical properties of hybrid fibre reinforced composite concrete (HyFRCC) containing different proportions of steel fibre (SF) and polypropylene fibre (PPF). The mechanical properties include compressive strength, tensile strength, and flexural strength. SF is known to enhance the flexural and tensile strengths, and at the same time is able to resist the formation of macro cracking. Meanwhile, PPF contributes to the tensile strain capacity and compressive strength, and also delay the formation of micro cracks. Hooked-end deformed type SF fibre with 60 mm length and fibrillated virgin type PPF fibre with 19 mm length are used in this study. Meanwhile, the concrete strength is maintained for grade C30. The percentage proportion of SF-PPF fibres are varied in the range of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% of which the total fibre volume fraction (Vf) is fixed at 0.5%. The experimental results reveal that the percentage proportion of SF-PPF fibres with 75-25% produced the maximum performance of flexural strength, tensile strength and flexural toughness. Meanwhile, the percentage proportion of SF-PPF fibres with 100-0% contributes to the improvement of the compressive strength compared to that of plain concrete.

Sign in / Sign up

Export Citation Format

Share Document