Experimental Research on the Effects of Pipe Diameter on Axial Compression Properties of GFRP Tubes Reinforced Concrete Column

2012 ◽  
Vol 204-208 ◽  
pp. 972-977
Author(s):  
Yun Feng Zhang ◽  
Shou Kang Liu ◽  
De Wang Zhao
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Concrete Columns ◽  
Pipe Diameter ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Compression Properties ◽  
Frp Tubes ◽  
Axial Compression Experiment

Through the axial compression experiment of 9 GFRP tubes reinforced concrete columns, this paper analyzes the failure mode and loading-strain curves under different pipe diameter, and compares bearing capacity between the experimental data with FRP reinforced concrete and the calculated value without GFRP tubes reinforced concrete. he results show that the bearing capacity and ductility of GFRP tubes reinforced concrete column have improved, because of the restriction effect of FRP tubes. The confining ability of FRP tubes on concrete reduced for a certain thickness GFRP tubes constraint concrete short column, while the pipe diameter is increasing.

Experimental Research on the Effects of Reinforcement Ratio on Axial Compression Properties of FRP Reinforced Concrete Column

2012 ◽  
Vol 193-194 ◽  
pp. 721-726
Author(s):  
Yun Feng Zhang ◽  
Zhong Liang Lv ◽  
De Wang Zhao
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Axial Compression ◽  
Concrete Columns ◽  
Reinforcement Ratio ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Compression Properties ◽  
Frp Tubes ◽  
Axial Compression Experiment

Through the axial compression experiment of 11 FRP reinforced concrete columns, this paper analyzes the failure mode and loading-strain curves.Comparison between the experimental data with FRP reinforced concrete and the calculated value without FRP reinforced concrete is done. The results show that the reinforcement for the component will increase ductility and ultimate bearing capacity of the composite column, but the increase of reinforcement ratio will also reduce confining ability of FRP tubes.

Experimental Research on Bearing Capacity of Concrete Columns with High Strength Concrete Core under Axial Compression Loading

2012 ◽  
Vol 479-481 ◽  
pp. 2041-2045
Author(s):  
Yue Qi
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Concrete Core ◽  
Strength Concrete

Based on experimental research on plain concrete columns with high strength concrete core, the formula to predict the bearing capacity of concrete columns with high strength concrete core under axial compression loading was brought forward in previous paper, in order to verify the formula whether right, axial compression test including 3 concrete columns with high strength concrete core and 1 ordinary reinforced concrete column were completed, and the failure characteristic was analyzed additionally. According to experimental results, it can be shown that the failure modes of concrete columns with high strength concrete core are similar to that of ordinary reinforced concrete columns, however, the bearing capacity of concrete columns with high strength concrete core is significant higher compared with that of ordinary reinforced concrete column; the results of the bearing capacity obtained by the formula (2) was in good agreement with the experimental results.

Stimulation Analysis of High Temperature Bearing Capacity of Steel Reinforced Concrete Column Strengthened by CFRP

2013 ◽  
Vol 351-352 ◽  
pp. 401-405
Author(s):  
Cheng Zhu Qiu ◽  
Gang Yang
Keyword(s):  
Reinforced Concrete ◽  
High Temperature ◽  
Bearing Capacity ◽  
Cross Section ◽  
Concrete Columns ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Simulation Research ◽  
Steel Reinforced Concrete ◽  
Finite Element Software

The steel reinforced concrete column is one of the important members for structures, it is essential to study the high temperature performance of concrete column. The numerical simulation research is done using finite element software ANSYS. Under the high temperature, the analysis of the compressive bearing capacity and flexural capacity of the concrete columns strengthened by CFRP is done, and the compressive bearing capacities of different cross-section concrete columns strengthened with CFRP are tested.

Mechanical Behavior Analysis of Reinforced Concrete Column Strengthening with Shear Wall

2013 ◽  
Vol 438-439 ◽  
pp. 696-700
Author(s):  
Peng Tian ◽  
Xu Dong Shi ◽  
Yuan Qing Wang ◽  
Yan Nian Zhang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Wall Thickness ◽  
Mechanical Performance ◽  
Concrete Columns ◽  
Shear Wall ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Skeleton Curve ◽  
Reversed Loading

This paper studies the influences of factors such as axial compressive ratio and shear wall thickness on the mechanical performance of the reinforced concrete column strengthening with shear wall under low-cyclic reversed loading. Considering the secondary stress characteristics of the strengthening column, a numerical analysis was made on the load displacement hysteretic curve and skeleton curve. The results show that, with the increasing of axial compression ratio, the bearing capacity and stiffness of reinforced concrete column increased, but the ductility of reinforced column reduced; the bearing capacity and rigidity of reinforced column strengthening with shear wall increase while the ductile was lower; the change of shear wall thickness has a little effect on the bearing capacity, but improves the energy dissipation capacity of reinforced concrete columns.

Performance Analysis of Concrete-Filled Steel Tube Column and Reinforced Concrete Column under Axial Compression

2012 ◽  
Vol 446-449 ◽  
pp. 82-85
Author(s):  
Chuang Du ◽  
Xiao Ming Yang ◽  
Ning Li Li
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Comparative Investigation ◽  
Steel Tube ◽  
Concrete Column ◽  
The Finite Element Method ◽  
Reinforced Concrete Column ◽  
Concrete Filled Steel Tube ◽  
Compression Performance

In this paper, a comparative investigation into the behavior of concrete-filled steel tube column and reinforced concrete column with the same quantity of material and cross-section sizes under axial load have been undertaken using the finite element method. Both is analyzed to compare the axial compression performance,including bearing capacity, ductility and their mechanism. The results of the analyses clearly exhibit that bearing capacity of concrete-filled steel tube column is higher about 25% than that of reinforced concrete column. Under the same conditions, ductility of concrete-filled steel tube column is better than reinforced concrete column, its application is recommended in construction practice.

Experimental Study on Axial-Compression Reinforced Concrete Column Strengthened by Circular Steel Tube

2011 ◽  
Vol 94-96 ◽  
pp. 1261-1270 ◽  
Author(s):  
Mei Hua Wang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Work Performance ◽  
Load Capacity ◽  
Steel Tube ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Circular Steel Tube ◽  
Core Column

In the case of small increase of cross-section, concrete column strengthened by circular steel tube can increase the bearing capacity greatly as well as ductility. This has resulted in engineering welcome. This paper studied the common work performance of reinforced concrete column strengthened by circular steel tube in three different conditions test of axial compression. The results show that outsourcing steel and core column can be achieved interaction. By strengthening, it can improve the load capacity of the concrete column as well as ductility. With the increase in initial load, although it has little effect on the bearing capacity of reinforced columns, it can affect the ductility to some extent. This paper can provide experimental basis for engineering applications.

Experimental Investigation of Large Eccentrically Compressed Reinforced Concrete Column Consolidated with FRP Sheets

2011 ◽  
Vol 94-96 ◽  
pp. 1309-1312
Author(s):  
Guang Ling Guo
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Columns ◽  
Experimental Results ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Before And After ◽  
Calculation Results ◽  
Fiber Sheet

According to the experiment of 11 eccentrically compressed reinforced concrete columns and 1 comparative column under the monotonic loading, the bearing capacity，ductility，and the destruction mode of the columns before and after their consolidation have been compared and analyzed．The experimental results illustrates that external coherence of FRP could effectively enhance their bearing capacity and the improvements have relation to many aspects, such as the number of fiber layers, the category of fiber, approaches of how fiber sheet paste, the width of FRP and consolidation space and so on; the ductility of consolidation column mainly depends on how fabric pasted. Longitudinal pasting fiber sheets can greatly improve the bearing capacity of the column, but its ductility declined; the longitudinal-horizontal pasting fiber sheets can enhance column’s the bearing capacity and ductility and this brings about the best consolidation effects. Additionally, based on the analysis of experimental results, a formula for the bearing capacity of the normal section of the large eccentric loading reinforced concrete column consolidated with FRP sheets has been proposed, and the calculation results tally with the experimental results.

Experimental Research on Eccentric Compressive Performance of Steel Tube-Reinforced Concrete Column

2010 ◽  
Vol 163-167 ◽  
pp. 184-190
Author(s):  
Quan Quan Guo ◽  
Yu Xi Zhao ◽  
Kun Shang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Compressive Load ◽  
Concrete Columns ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Displacement Curve ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Reinforced Concrete Columns

Eccentric loading experiment of 13 steel tube-reinforced concrete columns and a reinforced concrete column is implemented. The whole process from the start load on the steel tube-reinforced concrete column until damage has been researched. Change of ultimate bearing capacity with eccentricity, longitudinal reinforcement ratio, position coefficient has been studied, and deflection curve and load-vertical displacement curve under eccentric compressive load were obtained. Failure characteristics of steel tube-reinforced concrete were divided into two different type, small eccentric damage and big eccentric damage. With the same conditions, when steel tube ratio of steel tube-reinforced concrete was 2%, its ultimate bearing capacity was nearly double of reinforced concrete columns.

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.

scholarly journals Research on the Seismic Performance of the Prefabricated Reinforced Concrete Column with Steel Mortise and Tenon Connections

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Jun Yan ◽  
Lianjie Jiang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Seismic Performance ◽  
Steel Plate ◽  
Concrete Columns ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Reinforced Concrete Columns ◽  
Capacity Degradation ◽  
Mortise And Tenon

In this study, 6 prefabricated reinforced concrete columns with different lengths of connectors and thicknesses of the steel plate used in connectors and 1 cast-in-place reinforced concrete column were made, and then these specimens were tested under the low cycled reversed loading experiment to study the seismic performance of the prefabricated reinforced concrete columns with steel mortise and tenon connections. The failure mode, bearing capacity, ductility, stiffness degradation, and energy dissipation of the specimens were analyzed. The results show that compared with the cast-in-place specimens, the bearing capacity of the fabricated specimen is reduced by 5.77%–16.67%, but the ductility is increased by 11.28%–26.69%, and the cumulative energy consumption is increased by 3.40%–30.29%; the stiffness, bearing capacity degradation, and hysteretic behavior of the fabricated specimen under different displacement angles are less different from those of the cast-in-place specimens. When the length of the connector is 100 mm and the thickness of the steel plate used in the connector is 4 mm, the weld fracture may occur in the connection area of the fabricated specimen. The test results show that when the connector with a length of 100 mm is used, the thickness of the steel plate of the connector should not be less than 6 mm.

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