Axial compression capacity of concrete columns reinforced with corrosion-resistant hybrid reinforcement

2021 ◽  
Vol 302 ◽  
pp. 124209
Author(s):  
J.W. Wright ◽  
C.P. Pantelides
Keyword(s):  
Axial Compression ◽  
Concrete Columns ◽  
Corrosion Resistant ◽  
Hybrid Reinforcement

scholarly journals Axial Compression Capacity of Concrete Columns Reinforced With Corrosion-Resistant Metallic Reinforcement

2021 ◽  
Author(s):  
John Wright ◽  
Chris Pantelides
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Axial Compression ◽  
Concrete Columns ◽  
Concrete Cover ◽  
Control Group ◽  
Accelerated Corrosion ◽  
Corrosion Resistant ◽  
Compression Performance ◽  
Steel Bars

Abstract Axial compression performance of concrete columns reinforced with 2304 duplex stainless bars and spirals, carbon steel bars and spirals, and 316L stainless steel clad bars, in varying combinations is examined when the columns are exposed to corrosion. Two groups of columns were investigated: a control group, and a group submerged in a 5.0% by weight chloride solution subjected to accelerated corrosion. A relatively high corrosion rate of 8.5 μA/mm2 was used. After 60 days of corrosion the columns were tested to failure under axial compression. In terms of mass loss per unit of corrosion energy, columns reinforced with stainless steel spirals and either solid stainless or stainless clad vertical bars were 197% more corrosion resistant than carbon steel. Bars made with 2304 stainless steel and 316L stainless clad materials developed localized pitting corrosion that led to degradation of the concrete cover and a larger drop in axial compression than carbon steel reinforced columns. However, the all-carbon steel reinforced columns reached lower failure displacements and a corroded carbon steel reinforced column was the only column to experience sudden failure prior to reaching its theoretical maximum axial compression capacity. Axial compression capacity of the columns in both the control and corroded conditions was modeled using concrete confinement models that produced very good agreement with the experimental results.

scholarly journals Axial Compression Capacity of Concrete Columns Reinforced with Corrosion-Resistant Metallic Reinforcement

2021 ◽  
Author(s):  
John Wright ◽  
Chris Pantelides
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Axial Compression ◽  
Concrete Columns ◽  
Concrete Cover ◽  
Control Group ◽  
Accelerated Corrosion ◽  
Corrosion Resistant ◽  
Compression Performance ◽  
Steel Bars

Abstract Axial compression performance of concrete columns reinforced with 2304 solid stainless bars and spirals, carbon steel bars and spirals, and 316L stainless steel clad bars is examined after the columns are exposed to severe corrosion. Two groups of columns were investigated: a control group, and a group submerged in a 5.0% by weight chloride solution subjected to accelerated corrosion. A relatively high impressed current density of 8.5 μA/mm2 was used and after 60 days of accelerated corrosion the columns were tested to failure under axial compression. In terms of mass loss per unit of corrosion energy, columns reinforced with stainless steel spirals and either solid stainless or stainless clad vertical bars were 197% more corrosion resistant than carbon steel. Bars made with 2304 solid stainless steel and 316L stainless clad materials developed localized pitting corrosion that led to degradation of the concrete cover and a larger drop in axial compression than carbon steel reinforced columns. However, the carbon steel reinforced columns reached lower failure displacements and a corroded carbon steel reinforced column was the only column to experience sudden failure prior to reaching its theoretical maximum axial compression capacity. Axial compression capacity of the columns in both the control and corroded conditions was modeled using concrete confinement models that produced good agreement with the experimental results.

scholarly journals Axial compression capacity of concrete columns reinforced with corrosion-resistant metallic reinforcement

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
John W. Wright ◽  
Chris P. Pantelides
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Axial Compression ◽  
Concrete Columns ◽  
Concrete Cover ◽  
Control Group ◽  
Accelerated Corrosion ◽  
Corrosion Resistant ◽  
Compression Performance ◽  
Steel Bars

AbstractAxial compression performance of concrete columns reinforced with 2304 solid stainless bars and spirals, carbon steel bars and spirals, and 316 L stainless steel clad bars is examined after the columns are exposed to severe corrosion. Two groups of columns were investigated: a control group, and a group submerged in a 5.0% by weight chloride solution subjected to accelerated corrosion. A relatively high impressed current density of 8.5 μA/mm2 was used and after 60 days of accelerated corrosion the columns were tested to failure under axial compression. In terms of mass loss per unit of corrosion energy, columns reinforced with stainless steel spirals and either solid stainless or stainless clad vertical bars were 197% more corrosion resistant than carbon steel. Bars made with 2304 solid stainless steel and 316 L stainless clad materials developed localized pitting corrosion that led to degradation of the concrete cover and a larger drop in axial compression than carbon steel reinforced columns. However, the carbon steel reinforced columns reached lower failure displacements and a corroded carbon steel reinforced column was the only column to experience sudden failure prior to reaching its theoretical maximum axial compression capacity. Axial compression capacity of the columns in both the control and corroded conditions was modeled using concrete confinement models that produced good agreement with the experimental results.

A combined experimental and numerical analysis on the seismic behavior of short reinforced concrete columns with different structural sizes and axial compression ratios

2017 ◽  
Vol 27 (9) ◽  
pp. 1416-1447 ◽  
Author(s):  
Liu Jin ◽  
Shuai Zhang ◽  
Dong Li ◽  
Haibin Xu ◽  
Xiuli Du ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Axial Compression ◽  
Seismic Behavior ◽  
Load Capacity ◽  
Concrete Columns ◽  
Simulation Method ◽  
Reinforced Concrete Columns ◽  
Mesoscopic Simulation ◽  
Energy Dissipation Capacity

The results of an experimental program on eight short reinforced concrete columns having different structural sizes and axial compression ratios subjected to monotonic/cyclic lateral loading were reported. A 3D mesoscopic simulation method for the analysis of mechanical properties of reinforced concrete members was established, and then it was utilized as an important supplement and extension of the traditional experimental method. Lots of numerical trials, based on the restricted experimental results and the proposed 3D mesoscopic simulation method, were carried out to sufficiently evaluate the seismic performances of short reinforced concrete columns with different structural sizes and axial compression ratios. The test results indicate that (1) the failure pattern of reinforced concrete columns can be significantly affected by the shear-span ratio; (2) increasing the axial compression ratio could improve the load capacity of the reinforced concrete column, but the deformation capacity would be restricted and the failure mode would be more brittle, consequently the energy dissipation capacity could be deteriorated; and (3) the load capacity, the displacement ductility, and the energy dissipation capacity of the short reinforced concrete columns all exhibit clear size effect, namely, the size effect could significantly affect the seismic behavior of reinforced concrete columns.

scholarly journals Axial compression behavior of reinforced geopolymer concrete columns with demolished concrete lumps

2017 ◽  
Vol 210 ◽  
pp. 203-210
Author(s):  
Zhi-Jian Zhang ◽  
Hai-Yan Zhang ◽  
Jun-Hong Zheng ◽  
Kai-Hang Lin ◽  
Yi Su
Keyword(s):  
Axial Compression ◽  
Concrete Columns ◽  
Geopolymer Concrete ◽  
Compression Behavior

Study on the Behaviors of Steel Reinforced Concrete Cloumns

2011 ◽  
Vol 368-373 ◽  
pp. 248-252
Author(s):  
Bao Sheng Yang ◽  
Yun Yun Li
Keyword(s):  
Bearing Capacity ◽  
Axial Compression ◽  
Compression Ratio ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Slenderness Ratio ◽  
High Strength ◽  
Concrete Columns ◽  
Axial Compression Ratio ◽  
High Strength Concrete Columns

The influence on columns behaviors of slenderness ratio are analyzed, and the influence on columns’ anti-seismic behavior of axial compression ratio, stirrup ratio and steel form are analyzed through the test on bearing capacity and level load of low cycle reverse of steel reinforced high-strength concrete columns. The bearing capacity of the long columns reduces along with the slenderness ratio increasing and augments along with concrete strength increasing. Probability of suddenly destruct increases along with the column slenderness ratio augmenting through the test. In addition, anti-seismic behavior of columns are effected not only axial compression ratio, but also steel form. Axial compression coefficien of the steel reinforced high-strength concrete columns with different steel form may be adjusted, however, the influence of stirrup ratio is very little on anti-seismic behavior of columns.

Sign in / Sign up

Export Citation Format

Share Document