Behaviour of GGBS-dolomite geopolymer concrete short column under axial loading

2020 ◽  
Vol 30 ◽  
pp. 101232 ◽  
Author(s):  
P. Saranya ◽  
Praveen Nagarajan ◽  
A.P. Shashikala
Keyword(s):  
Axial Loading ◽  
Geopolymer Concrete ◽  
Short Column

scholarly journals Performance of composite reinforced short column under axial loading

2018 ◽  
Vol 7 (3) ◽  
pp. 1376
Author(s):  
N Chaitanya ◽  
V Ranga Rao ◽  
M Achyutha Kumar Reddy
Keyword(s):  
Axial Loading ◽  
Element Model ◽  
Strain Gauges ◽  
Load Carrying Capacity ◽  
Short Column ◽  
Equal Angle ◽  
Short Columns ◽  
Load Carrying ◽  
Strain Stress ◽  
Loaded Column

The purpose of this paper is to compare the behaviour of composite reinforced concrete square short columns and conventional square short column. Experiments are conducted on four axially loaded column specimens till failure. Among four specimens, two are conventional and remaining two columns are having equal angles as main reinforcement. Short columns are designed using IS 456 2000. The obtained details of main reinforcement are replaced in area wise by equal angle (ISA 2525). The tie reinforcement used to withhold the main reinforcement in position are retained with the same deformed bars. Performance of columns are measured in terms of load carrying capacity, longitudinal strain, stress, crushing modes, strains in each face using strain gauges. Outcome of the experiments are compared and plotted in the form of stress vs strain of the column. A finite element model was developed using Abaqus to simulate the results.  

scholarly journals Glass FRP-Reinforced Geopolymer Based Columns Comprising Hybrid Fibres: Testing and FEA Modelling

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 324
Author(s):  
Ahmad Rashedi ◽  
Riadh Marzouki ◽  
Ali Raza ◽  
Khawar Ali ◽  
Niyi Gideon Olaiya ◽  
...  
Keyword(s):  
Finite Element ◽  
Failure Modes ◽  
Axial Loading ◽  
Concrete Columns ◽  
Element Model ◽  
Geopolymer Concrete ◽  
Polypropylene Fibres ◽  
Hybrid Fibre ◽  
Concrete Damage ◽  
Glass Frp

This study seeks to evaluate the effectiveness of glass-FRP-reinforced geopolymer concrete columns integrating hybrid fibres (GFGC columns) and steel bar-reinforced geopolymer concrete columns incorporating hybrid fibres (SFGC columns) under eccentric and concentric loadings. Steel fibre (SF) and polypropylene fibres (PF) are two types of fibres that are mixed into hybrid fibre-reinforced geopolymer concrete (HFRGC). Eighteen circular concrete columns with a cross-section of 300 mm × 1200 mm were cast and examined under axial loading up to failure. Nine columns were cast with glass-FRP rebars, whereas the other nine were cast with steel rebars. Using ABAQUS, a nonlinear finite element model was established for the GFGC and SFGC columns. The HFRGC material was modelled using a simplified concrete damage plasticity model, whereas the glass-FRP material was simulated as a linear elastic material. It was observed that GFGC columns had up to 20% lower axial strength (AST) and up to 24% higher ductility indices than SFGC columns. The failure modes of both GFGC and SFGC columns were analogous. Both GFGC and SFGC columns revealed the same effect of eccentricity in the form of a decline in AST. A novel statistical model was suggested for predicting the AST of GFGC columns. The outcomes of the experiments, finite element simulations, and theoretical results show that the models can accurately determine the AST of GFGC columns.

Calculation and Analysis for Limit Bearing Capacity of Steel Tube Reinforced Short Column Piers by Limit Equilibrium Method

2015 ◽  
Vol 744-746 ◽  
pp. 8-12
Author(s):  
Jin Sheng Liu ◽  
Bo Qiu ◽  
Yong Jiu Qian
Keyword(s):  
Bearing Capacity ◽  
Limit Equilibrium ◽  
Axial Loading ◽  
Limit Equilibrium Method ◽  
Steel Tube ◽  
Computational Theory ◽  
Short Column ◽  
Equilibrium Method ◽  
Calculation Results ◽  
Mechanics Characteristics

The existed concrete column reinforced by external steel tube is a common reinforcement technique and widely used in engineering. However, the computational theory on bearing capacity of the reinforced structure is insufficient at present. In the condition that the existed column concrete before completely unloading is reinforced or the initial stress level is low, the mechanics characteristics of reinforced components were analyzed based on the limit equilibrium method, and then the computational equations of the bearing capacity subjected to axial loading after the short column pier reinforced structure had been deduced. Comparing the calculation results with the correspondent experimental data shows that the deduced equation can provide reasonable results for predicting the axial bearing capacity, which provides a support for the computation of the bearing capacity for the reinforcement pier in practice.

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