Mechanical Characterization of Normal and High-Strength Steel Bars in Reinforced Concrete Members under Fire

2020 ◽  
Vol 146 (7) ◽  
pp. 04020110 ◽  
Author(s):  
Spencer E. Quiel ◽  
Christopher H. Irwin ◽  
Clay J. Naito ◽  
Natasha Vermaak
Keyword(s):  
Reinforced Concrete ◽  
High Strength Steel ◽  
Mechanical Characterization ◽  
High Strength ◽  
Concrete Members ◽  
Steel Bars

The resistance of compressed spun concrete members reinforced by high-strength steel bars

2007 ◽  
Vol 41 (2) ◽  
pp. 419-430 ◽  
Author(s):  
Antanas Kudzys ◽  
Romualdas Kliukas
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
Concrete Members ◽  
Steel Bars ◽  
Spun Concrete

scholarly journals EXPERIMENTAL LOAD-DRIFT RELATIONS OF CONCRETE BEAM REINFORCED AND CONFINED WITH HIGH-STRENGTH STEEL BARS UNDER REVERSED CYCLIC LOADING

2021 ◽  
Vol 11 (4) ◽  
pp. 56-69
Author(s):  
Retno Anggraini ◽  
Tavio Tavio ◽  
Gusti Putu Raka ◽  
Agustiar Agustiar
Keyword(s):  
Reinforced Concrete ◽  
High Strength Steel ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Concrete Strength ◽  
High Strength ◽  
Reinforced Concrete Beams ◽  
Test Results ◽  
Steel Bars ◽  
Normal Strength

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.

Preliminary Results on the Tensile Capacity of Steel Anchors in Brick Units of Different Materials

2019 ◽  
Vol 817 ◽  
pp. 371-376 ◽  
Author(s):  
Peng Zhen Chen ◽  
Francesco Finelli ◽  
Elisa Franzoni ◽  
Cristina Gentilini ◽  
Gabriele Sansone
Keyword(s):  
Mechanical Characterization ◽  
High Strength ◽  
Substrate Material ◽  
Masonry Buildings ◽  
Structural Elements ◽  
Mechanical Interlocking ◽  
Preliminary Results ◽  
Pull Out ◽  
Steel Bars

High strength steel bars are widely used for the strengthening of masonry buildings, in particular to improve the connection between different structural elements, such as orthogonal walls and multi-leaf walls. A particular type of steel connector is the twisted bar, which due to its particular shape works as a self-threading screw, anchoring to the support material without any binder. The effectiveness of such technique mainly relies on the bond between the bar and the substrate, where adhesion, mechanical interlocking and friction play an important role. In this paper, a preliminary experimental study on pull-out behavior of twisted steel connectors inserted in brick units of different materials that can be commonly found in existing masonry buildings in Italy and in Europe is presented. Additionally, mechanical characterization of the materials is conducted to understand the influence of the compression strength and elastic modulus on the adhesion between the connector and the substrate. Preliminary results show that the pull-out response strongly depends on the mechanical properties of the substrate material.

Torsional Behavior of Reinforced Concrete Beams with High-Strength Steel Bars

2019 ◽  
Vol 116 (6) ◽  
Author(s):  
Changhyuk Kim ◽  
Seungeun Kim ◽  
Kil-Hee Kim ◽  
DongIk Shin ◽  
Muhammad Haroon ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Strength Steel ◽  
Concrete Beams ◽  
High Strength ◽  
Reinforced Concrete Beams ◽  
Steel Bars ◽  
Torsional Behavior

The Mechanical Characterization of Low Work Hardening, High Strength Steel

2005 ◽  
Vol 2 (9) ◽  
pp. 14145
Author(s):  
SW Dean ◽  
RI Scott ◽  
PD Hodgson
Keyword(s):  
Work Hardening ◽  
High Strength Steel ◽  
Mechanical Characterization ◽  
High Strength
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