Experimental and analytical investigation on the confinement behavior of low strength concrete under axial compression

Structures ◽  
2022 ◽  
Vol 36 ◽  
pp. 303-313
Author(s):  
Mujahid Ali ◽  
Sheraz Abbas ◽  
Afonso Rangel Garcez de Azevedo ◽  
Markssuel Teixeira Marvila ◽  
Muwaffaq Alqurashi ◽  
...  
Keyword(s):  
Axial Compression ◽  
Analytical Investigation ◽  
Strength Concrete ◽  
Low Strength ◽  
Confinement Behavior ◽  
Low Strength Concrete

scholarly journals Investigating Optimal Confinement Behaviour of Low-Strength Concrete through Quantitative and Analytical Approaches

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4675
Author(s):  
Mujahid Ali ◽  
Sheraz Abbas ◽  
Bashir Salah ◽  
Javed Akhter ◽  
Waqas Saleem ◽  
...  
Keyword(s):  
Axial Compression ◽  
High Standard ◽  
Analytical Investigation ◽  
Analytical Models ◽  
Transverse Reinforcement ◽  
Strength Concrete ◽  
Low Strength ◽  
Transverse Steel ◽  
Analytical Approaches ◽  
Low Strength Concrete

Reinforced concrete is used worldwide in the construction industry. In past eras, extensive research has been conducted and has clearly shown the performance of stress–strain behaviour and ductility design for high-, standard-, and normal-strength concrete (NSC) in axial compression. Limited research has been conducted on the experimental and analytical investigation of low-strength concrete (LSC) confinement behaviour under axial compression and relative ductility. Meanwhile, analytical equations are not investigated experimentally for the confinement behaviour of LSC by transverse reinforcement. The current study experimentally investigates the concrete confinement behaviour under axial compression and relative ductility of NSC and LSC using volumetric transverse reinforcement (VTR), and comparison with several analytical models such as Mender, Kent, and Park, and Saatcioglu. In this study, a total of 44 reinforced-column specimens at a length of 18 in with a cross-section of 7 in × 7 in were used for uniaxial monotonic loading of NSC and LSC. Three columns of each set were confined with 2 in, 4 in, 6 in, and 8 in c/c lateral ties spacing. The experimental results show that the central concrete stresses are significantly affected by decreasing the spacing between the transverse steel. In the case of the LSC, the core stresses are double the central stress of NSC. However, increasing the VTR, the capacity and the ductility of NSC and LSC increases. Reducing the spacing between the ties from 8 in to 2 in center to center can affect the concrete column’s strength by 60% in LSC, but 25% in the NSC. The VTR and the spacing between the ties greatly affected the LSC compared to NSC. It was found that the relative ductility of the confined column samples was almost twice that of the unrestrained column samples. Regarding different models, the Menders model best represents the performance before the ultimate strength, whereas Kent and Park represents post-peak behaviour.

scholarly journals Stress–Strain Model for Low-Strength Concrete in Uni-Axial Compression

2014 ◽  
Vol 40 (2) ◽  
pp. 313-328 ◽  
Author(s):  
Sohaib Ahmad ◽  
Kypros Pilakoutas ◽  
Qaiser uz Zaman Khan ◽  
Kyriacos Neocleous
Keyword(s):  
Axial Compression ◽  
Stress Strain ◽  
Strength Concrete ◽  
Low Strength ◽  
Strain Model ◽  
Low Strength Concrete

scholarly journals Experimental Investigation on Short Concrete Columns Reinforced by Bamboo Scrimber under Axial Compression Loads

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Min Lei ◽  
Zihao Wang ◽  
Penghui Li ◽  
Liyi Zeng ◽  
Hongyao Liu ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Concrete Columns ◽  
Steel Reinforcement ◽  
Concrete Column ◽  
Strength Concrete ◽  
Bamboo Scrimber ◽  
Low Strength ◽  
Low Strength Concrete

The paper presents bamboo scrimber bars as a reinforcing material instead of steel reinforcement in low-strength concrete columns. Twelve short concrete columns with different reinforcements are tested under axial compression load to study the axial compressive behavior of short concrete columns reinforced by bamboo scrimber. Three columns are reinforced concrete columns, and the other nine columns are bamboo scrimber reinforced concrete columns. The failure process, bearing capacity, axial deformation, and strain of the specimens are compared and analyzed. The results show that the bonding performance between the bamboo scrimber bars by surface treatment and low-strength concrete is excellent. In low-strength concrete columns, the material properties of bamboo bars play more thoroughly than those of steel bars. When the bamboo reinforcement ratio is increased, the concrete column ductility is significantly improved, but the bearing capacity of the concrete column is not increased. The bamboo scrimber bars with the size of 10 mm × 10 mm or 15 mm × 15 mm can be used as longitudinal bars of low-strength concrete columns. The ductility of the short concrete column with 2.56% bamboo scrimber reinforcement is close to that of the short concrete column with 0.72% steel reinforcement.

Effectiveness of wood waste sawdust to produce medium- to low-strength concrete materials

2021 ◽  
pp. 103237
Author(s):  
Farnaz Batool ◽  
Kamrul Islam ◽  
Celal Cakiroglu ◽  
Anjuman Shahriar
Keyword(s):  
Wood Waste ◽  
Strength Concrete ◽  
Concrete Materials ◽  
Low Strength ◽  
Low Strength Concrete

Use of angle steel as internal reinforcement in low strength concrete: an experimental study

2021 ◽  
Vol 11 (3) ◽  
pp. 231
Author(s):  
H.M.A. Mahzuz ◽  
Sourav Ray ◽  
Ajoy Bala ◽  
Bijoy Chondo Jony
Keyword(s):  
Experimental Study ◽  
Strength Concrete ◽  
Low Strength ◽  
Angle Steel ◽  
Low Strength Concrete

Bond behaviour of low-strength concrete

1992 ◽  
Vol 44 (160) ◽  
pp. 195-203 ◽  
Author(s):  
A. Z. Mohamed ◽  
L. A. Clark
Keyword(s):  
Bond Behaviour ◽  
Strength Concrete ◽  
Low Strength ◽  
Low Strength Concrete
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