Evaluation of higher-strength steel reinforcing bar elongation for seismic design according to various standard specifications

Agustiar,; Tavio,; Raka, I Gusti Putu; Anggraini, Retno

doi:10.1063/1.5085976

Cited by 4 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Researches have been carried out to investigate these requirements which include the characteristics of stress-strain curves, the tensile-yield strength ratio, and the maximum elongation for several higher-strength steel bars. The results obtained indicate that higher-strength steel bars could still meet all these three requirements even though the values are not as high as the corresponding values of the normal-strength steel bars [18][19][20].…”

Section: Introductionmentioning

confidence: 77%

Experimental Load-Drift Relations of Concrete Beam Reinforced and Confined With High-Strength Steel Bars Under Reversed Cyclic Loading

Anggraini

Tavio

Raka

et al. 2021

AEJ

Self Cite

View full text Add to dashboard Cite

High-strength steel bars have different characteristics from normal-strength steel bars. Thus, the use of high-strength steel bars still needs to be investigated further before it can be used confidently in concrete structures. In the design, a reinforced concrete beam should also have enough ductility besides its loading capacity. One of the indicators identifies that a structure has sufficient ductility is its ability to maintain the load steadily due to progressive deformation. This paper presents the test results of three reinforced concrete beams designed with concrete strength (fc) of 30 MPa. Two different yield strengths (fy) of longitudinal and transverse reinforcements were used, namely, 420 and 550 MPa. The cross-sectional dimensions of the beams were 200  300 mm with a total span of 2000 mm and a rigid stub at the midspan. The beams were simply supported by double rollers at their tops and bottoms. These special supports were located at both ends of the beams. The load applied at the midspan of the beam through the rigid stub with the displacement control. The loading pattern protocol by the drift was set from 0 to 5.5 percent. Based on the test results, it can be seen that the beams with high-strength steel bars could achieve a higher load capacity than the beams with normal-strength steel bars. On the other hand, the beams with high-strength steel bars produced lower deflection than the beams with normal-strength steel bars. Furthermore, it can be concluded that all the beams could withstand the minimum required of 3.5 percent. None of the beams indicated brittle failures. All of the beams could survived until the end of the cycles at a drift of 5.5 percent. This condition indicates that the reinforced concrete beams with higher-strength reinforcement (fy of 550 MPa) could also maintain their load capacities under large deformation beyond the first yielding of the longitudinal steel bars.

show abstract

Section: Introductionmentioning

confidence: 77%

Experimental Load-Drift Relations of Concrete Beam Reinforced and Confined With High-Strength Steel Bars Under Reversed Cyclic Loading

Anggraini

Tavio

Raka

et al. 2021

AEJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…Confinement in columns has been studied for very long time by several researchers [1][2][3][4][5][6]. All studies confirm that the presence of confinement in column increases the peak stress, extends the strain, and improves the post-peak response [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 90%

Archives of Civil Engineering

Sabariman¹,

Soehardjono²,

Wisnumurti³

et al. 2020

View full text Add to dashboard Cite

Confinement in concrete can improve the descending branch of the stress-strain relationship of concrete. The addition of steel fiber in concrete can also improve the descending branch of the stress-strain relationship of concrete. The combination of the use of both can double the impact significantly on the post-peak response. It can be seen from the trend of the post-peak response that the values of both 0.85fccf and 0.5fccf can be well predicted. The study involved an experimental investigation on the effect of confinement on square column specimens reinforced with steel fiber. From the experimental program, it is proven that the use of combination of confining steel and steel fiber works very well which is indicated by the better improvement on the post-peak response. The proposed equations can predict the actual stress-strain curves quite accurately which include the effects of confinement parameters (Zm) and steel fiber volumetric parameter (Vf).

show abstract

“…The yield stresses above 500 MPa have shown a shorter or no clearly defined yield plateau in the stress-strain diagram. A study was conducted to determine the effects of the yield strength of steel bars on their elongations [28][29][30][31]. The results showed that the elongations of the steel bars with a yield strength of 420 MPa were longer than those of the steel bars with a yield strength of 550 MPa.…”

Section: Introductionmentioning

confidence: 99%

Effects of High-Strength Steel Bars on Short Concrete Columns Under Axial Load

Agustiar¹

2022

GEOMATE

View full text Add to dashboard Cite

The study involved the effect of high-strength longitudinal steel bars in normal-strength concrete columns. It aims to investigate the axial behavior of reinforced concrete columns due to the use of high-strength steel bars as longitudinal reinforcement. The experimental tests included five-column specimens under axial compressive loading. The longitudinal steel bars used were 13 mm in diameter with average yield strengths of 442.30 and 553.01 MPa. The stirrups used were 10 mm in diameter with average yield strengths of 436.06 and 522 MPa. The tests were carried out under axial compressive loading. The results showed that the capacity of the column specimen with high-strength longitudinal reinforcement (fy 550 MPa) was increased compared to the column with normal-strength longitudinal steel bars (fy 420 MPa). Column specimens with higher-strength longitudinal and transverse reinforcements indicated an increase in compressive strength. It can be concluded that the use of high-strength longitudinal steel bars does not significantly increase the capacity of reinforced concrete columns. Based on the deformations of the specimens under the conditions of peak stress and 0.85 peak stress (post-peak condition), the strain of the column specimen with normal-strength longitudinal and transverse reinforcements is greater than the other column specimens. The number of longitudinal reinforcements used could increase the deformability (ductility) of the concrete column. The stress-strain relationships of all test column specimens show ductile failure modes. It was found that the post-peak stressstrain relationships did not decrease considerably in all column specimens.

show abstract

Evaluation of higher-strength steel reinforcing bar elongation for seismic design according to various standard specifications

Cited by 4 publications

References 5 publications

Experimental Load-Drift Relations of Concrete Beam Reinforced and Confined With High-Strength Steel Bars Under Reversed Cyclic Loading

Experimental Load-Drift Relations of Concrete Beam Reinforced and Confined With High-Strength Steel Bars Under Reversed Cyclic Loading

Archives of Civil Engineering

Effects of High-Strength Steel Bars on Short Concrete Columns Under Axial Load

Contact Info

Product

Resources

About