Confinement Effect on Axial Behavior of Lightweight Aggregate Concrete Columns

2021 ◽  
Author(s):  
Ju-Hyun Mun ◽  
Keun-Hyeok Yang ◽  
Myoung-Sung Choi ◽  
Chun-Ho Chang
Keyword(s):  
Lightweight Aggregate ◽  
Concrete Columns ◽  
Confinement Effect ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Axial Behavior

Effect of confinement on the behaviour of high-strength lightweight concrete columns

1986 ◽  
Vol 13 (6) ◽  
pp. 741-751 ◽  
Author(s):  
R. Basset ◽  
S. M. Uzumeri
Keyword(s):  
Experimental Investigation ◽  
Lightweight Concrete ◽  
Concrete Strength ◽  
Lightweight Aggregate ◽  
High Strength ◽  
Concrete Columns ◽  
Lightweight Aggregate Concrete ◽  
Test Results ◽  
Aggregate Concrete ◽  
Concrete Confinement

This paper summarizes an experimental investigation into the behaviour of high strength sand – lightweight concrete columns confined with rectangular ties. Fifteen reinforced and three unreinforced specimens were tested under monotonically increasing axial compression. Variables considered in this study were the longitudinal steel distribution and tie configuration, the tie steel spacing, the amount of tie steel, and the amount of longitudinal steel.The results indicated that unconfined high-strength lightweight aggregate concrete is a brittle material. The addition of lateral confining steel significantly improved the behaviour of this material, with a large amount of lateral steel resulting in very ductile behaviour. The tie configuration and resulting distribution of longitudinal steel contributed significantly to the confinement of concrete, with well-distributed steel resulting in improved behaviour. The ratio of specimen to cylinder concrete strength was observed to be 0.98, which is much higher than the commonly assumed value of 0.85.The test results were compared with results from selected theoretical confinement models. Based on the results of this investigation, existing models for concrete confinement give unconservative results for high-strength lightweight aggregate concrete and overestimate the ductility that can be achieved with this material. Key words: columns, confinement, ductility, high-strength concretes, lightweight aggregate concretes, reinforcement, stress–strain relationships, tests, ties, toughness.

Experimental Study on All-Lightweight Aggregate Concrete Columns under Eccentric Loading

2012 ◽  
Vol 517 ◽  
pp. 392-397
Author(s):  
Yan Min Yang ◽  
Hao Zhang
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Lightweight Aggregate ◽  
Concrete Columns ◽  
Lightweight Aggregate Concrete ◽  
Fine Aggregate ◽  
Mechanical Behaviors ◽  
Load Bearing Capacity ◽  
Aggregate Concrete ◽  
Load Bearing

A kind of lightweight sand was only used as the fine aggregate to make the all-lightweight aggregate concrete, which can significantly reduce the gravity load of a structure and the foundation loads. Accordingly, the application of all-lightweight aggregate concrete in the construction projects can reduce the cost of foundation as well as construction project. In order to develop a new multi-story structural system which has a multifunction of load-bearing, lightweight and energy saving, the paper carried out an experimental study on the mechanical behaviors of six all-lightweight aggregate concrete columns with symmetrical reinforcement under eccentric loading. The failure modes, deformation characteristics and load-bearing capacity of the columns were analyzed. The effect of reinforcement ratio, stirrup ratio and eccentricity on the mechanical behaviors of the columns under eccentric loading were discussed. The test results show that all-lightweight aggregate concrete columns were loaded to failure with high load-bearing capacity and good ductility. The excellent mechanical behavior and the possibility of replacing the normal concrete with all-lightweight aggregate concrete were verified.

Flexural performance of lightweight aggregate concrete columns

2022 ◽  
Vol 251 ◽  
pp. 113545
Author(s):  
Chae-Rim Im ◽  
Keun-Hyeok Yang ◽  
Sanghee Kim ◽  
Ju-Hyun Mun
Keyword(s):  
Lightweight Aggregate ◽  
Concrete Columns ◽  
Lightweight Aggregate Concrete ◽  
Aggregate Concrete ◽  
Flexural Performance
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