Compression Test on Concrete Columns
SCHOOL OF CIVIL ENGINEERING
ABSTRACT
This report describes a compression test on concrete columns. The main aim of the tests was to illustrate the ultimate strength limit state of reinforced concrete columns in combined bending and compression and to demonstrate the influence of slenderness on the ultimate load capacity. Test methods are described. It was found that the concrete columns exhibited complicated behaviour, and had a squash load point of 342.7KN and moment at 0 KN.m, a decompression point of 227.75 KN and moment at 2.92 KN.m, a balanced point (nominal) of 58.46 KN and moment at 3.81KN.m, a pure bending point of 0 KN and moment at 2.86 KN.m, a balanced point (actual) of 42.26KN and moment at 3.86KN.m.
TABLE OF CONTENTS
ABSTRACT 1
1 Introduction 3
2 Test Method 3
3 Test Results and calculation 4
3.1 experiment result 4
3.2 theoritical result 6
4 Discussion 7
5 Conclusion 9
6 References 10
7 Appendices 10
1 Introduction
This study primarily explores the experimental study on the behaviour of concrete columns reinforced internally in combined bending and axial loads, and discusses the difference between experiment behaviour and the theoretical behaviour. First part of this study covers the experimental investigation of reinforced short column and slender column. Each type consists of two specimens with identical dimensions, geometry and reinforcing arrangement. The second part of this study is pertains to the theoretical sectional analysis of concrete columns. The interaction curves of axial force vs. moment are derived and plotted. Finally, the results of the analytical methods are compared with experimental predictions. Based on this study, the strength expressions are derived using the equilibrium, strain compatibility, and stress-strain relationship for the constituent materials in this report.
2 Test Method
The test runs on the compression test machine.
In this
ABSTRACT
This report describes a compression test on concrete columns. The main aim of the tests was to illustrate the ultimate strength limit state of reinforced concrete columns in combined bending and compression and to demonstrate the influence of slenderness on the ultimate load capacity. Test methods are described. It was found that the concrete columns exhibited complicated behaviour, and had a squash load point of 342.7KN and moment at 0 KN.m, a decompression point of 227.75 KN and moment at 2.92 KN.m, a balanced point (nominal) of 58.46 KN and moment at 3.81KN.m, a pure bending point of 0 KN and moment at 2.86 KN.m, a balanced point (actual) of 42.26KN and moment at 3.86KN.m.
TABLE OF CONTENTS
ABSTRACT 1
1 Introduction 3
2 Test Method 3
3 Test Results and calculation 4
3.1 experiment result 4
3.2 theoritical result 6
4 Discussion 7
5 Conclusion 9
6 References 10
7 Appendices 10
1 Introduction
This study primarily explores the experimental study on the behaviour of concrete columns reinforced internally in combined bending and axial loads, and discusses the difference between experiment behaviour and the theoretical behaviour. First part of this study covers the experimental investigation of reinforced short column and slender column. Each type consists of two specimens with identical dimensions, geometry and reinforcing arrangement. The second part of this study is pertains to the theoretical sectional analysis of concrete columns. The interaction curves of axial force vs. moment are derived and plotted. Finally, the results of the analytical methods are compared with experimental predictions. Based on this study, the strength expressions are derived using the equilibrium, strain compatibility, and stress-strain relationship for the constituent materials in this report.
2 Test Method
The test runs on the compression test machine.
In this
References: Dr Andrew Wheeler, ADVANCED DESIGNTM OF COLUMNS (accessed on 20/03/2012) http://www.reinforcing.com/asset/cms/TECHNICAL%20RESOURCES/Advanced_Design_Columns.pdf 7 Appendices