Design aids for rectangular reinforced concrete sections under combined bending and axial forces

1988 ◽  
Vol 15 (5) ◽  
pp. 916-928 ◽  
Author(s):  
P. Riva ◽  
M. Z. Cohn
Keyword(s):  
Reinforced Concrete ◽  
Portland Cement ◽  
Key Words ◽  
Axial Compression ◽  
Strength Analysis ◽  
Short Columns ◽  
Axial Forces ◽  
Portland Cement Association

Design interaction diagrams, Pr–Mr, for rectangular reinforced concrete sections under combined bending and axial compression or tension forces in accordance with the current Canadian code are presented. The interest of the note is that the interaction diagrams eliminate the limitations of those in the Canadian Portland Cement Association Handbook. Their format can be extended to other section shapes and reinforcement layouts. Key words: Combined bending, design aids, interaction diagrams, rectangular sections, reinforced concrete, short columns, strength analysis.

A Method for Deformation Analysis of Bar-Reinforced Concrete Filled Steel Tubular Columns under Axial Compression

2010 ◽  
Vol 163-167 ◽  
pp. 576-581
Author(s):  
Jin Sheng Han ◽  
Shu Ping Cong
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Deformation Process ◽  
Steel Tube ◽  
Experimental Results ◽  
Lateral Strain ◽  
Deformation Analysis ◽  
Simple Method ◽  
Full Load ◽  
Short Columns

Based on experimental researches, a simple numerical analysis method was presented to simulate the full load-deformation process of bar-reinforced concrete filled steel tubular short columns subjected to axial compression. Firstly, the interaction process of steel tube and concrete was analyzed, and then, the simplified constitutive models of steel tube and concrete were established on the base of previous analysis results. Secondly, the relation between lateral and longitudinal strain of steel tube was analyzed based on experimental results, and a simple method was presented to calculate the lateral strain of steel tube. Finally, a program was worked out to simulate the full load-deformation process of bar-reinforced concrete filled steel tubular short columns. The program’s simulation results of both ultimate bearing capacity and load-deformation curves are in good agreement with the experimental results.

Research of Compression Bearing Capacity of Steel Reinforced Concrete Short Column Replaced by C-BAR

2013 ◽  
Vol 438-439 ◽  
pp. 519-521
Author(s):  
Cheng Zhu Qiu
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Axial Compression ◽  
Steel Reinforced Concrete ◽  
Short Column ◽  
Reinforcing Bar ◽  
Short Columns

t is essential to study the performance of reinforced concrete short column. In this paper, the main reinforcements and hoopings in short columns were replaced by C-BAR reinforcements, the regularity of reinforcing bar replaced by C-BAR reinforcements was summarized. The results show that the axial compression bearing capacity of concrete short column is increased.

scholarly journals Effect of the addition of metakaolin on the carbonation of Portland cement concretes

2020 ◽  
Vol 13 (1) ◽  
pp. 1-18
Author(s):  
B. S. SANTOS ◽  
D. D. M. ALBUQUERQUE ◽  
D.V. RIBEIRO
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Portland Cement ◽  
Axial Compression ◽  
Capillary Absorption ◽  
Negative Contribution ◽  
Interstitial Solution ◽  
Pozzolanic Materials ◽  
Post Deposition ◽  
Concrete Reinforcement

Abstract Carbonation has been a concern of constructors and researchers because, by lowering the pH of the interstitial solution of the concrete, it can favor the post-deposition and subsequent corrosion of reinforced concrete reinforcement. Among the factors that influence carbonation is the use of pozzolanic materials, such as metakaolin. However, there is no consensus as to the positive or negative contribution of these additions. This work evaluated the influence of metakaolin on the mechanical properties, porosity and in particular on the carbonation of concrete, from the addition of 0%, 5%, 10% and 15% of metakaolin, in relation to the cement mass. From the results, it was observed that the addition of metakaolin, while not significantly influencing the porosity, gave the concrete a greater resistance to axial compression, a decrease in the capillary absorption and delayed the advance of the carbonation front in the concrete.

Experimental Studies of Reinforced Concrete Column Capacity Affected by Core Drilling

2010 ◽  
Vol 133-134 ◽  
pp. 1195-1200 ◽  
Author(s):  
Lei Zhu ◽  
Qing Feng Xu ◽  
Xiang Min Li ◽  
Chun Ming Zhu
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Experimental Studies ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Rc Columns ◽  
Core Drilling ◽  
Rc Column ◽  
Compression Failure ◽  
Short Columns

The paper presents the experimental studies of reinforced concrete column (RC column) capacity affected by core drilling. By testing three groups (9 total) of full scale concrete short columns, the experiment demonstrates that the axial compression capacity of RC columns after core drilling is reduced from 5.63% to 22.14% while the ultimate displacement decreases from 1.88% to 26.14%. The behavior of columns is altered from the axial compression failure to a small-eccentricity compression failure. The paper summarizes experiment results, followed by an investigation of the dominant factors, such as column effective cross section, drilling location, drilled hole repairing and reinforcing steels discontinued by drilling, that have impact on RC column capacity. The rationale of capacity variations of RC columns due to core drilling is also investigated.

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