scholarly journals Non-linear Analysis of Slender High Strength Concrete Column

2019 ◽  
Vol 5 (7) ◽  
pp. 1440-1451
Author(s):  
Ernesto Fenollosa ◽  
Iván Cabrera ◽  
Verónica Llopis ◽  
Adolfo Alonso
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Axial Force ◽  
High Strength Concrete ◽  
Bending Moment ◽  
High Strength ◽  
Concrete Columns ◽  
Strength Concrete ◽  
The Moment ◽  
High Strength Concrete Columns

This article shows the influence of axial force eccentricity on high strength concrete columns design. The behavior of columns made of normal, middle and high strength concrete with slenderness values between 20 and 60 under an eccentric axial force has been studied. Structural analysis has been developed by means of software which considers both geometrical and mechanical non-linearity. The sequence of points defined by increasing values of axial force and bending moment produced by eccentricity has been represented on the cross-section interaction diagram until failure for each tested column. Then, diagrams depicting the relationship between failure axial force and column's slenderness have been drawn. The loss of bearing capacity of the member for normal and middle strength columns when compared with the bearing capacity of their cross-section is more noticeable as axial force eccentricity assumes higher values. However, this situation reverses for high strength columns with high slenderness values. On the basis of results obtained, the accuracy level for the moment magnifier method was checked. Despite the good concordance in most of the cases, it was verified that the moment magnifier method leads to excessively tight results for high strength concrete columns with high slenderness values. In these specific cases, a coefficient which amends the column rigidity is proposed so as to obtain safer values.

Failure Probability of Short High-Strength Concrete Tied Columns

2003 ◽  
Vol 19 (2) ◽  
pp. 299-309
Author(s):  
Wen-Yao Lu ◽  
Ing-Juang Lin
Keyword(s):  
Monte Carlo ◽  
Cross Section ◽  
Failure Probability ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Monte Carlo Technique ◽  
Strength Model ◽  
Strength Concrete ◽  
High Strength Concrete Columns

ABSTRACTThis paper aims to investigate the failure probability of short high-strength concrete tied columns using the Monte Carlo technique. The random variables considered in this study are the strength of concrete, the strength of steels, the cross-section dimensions, the location of the steel reinforcement, the variability of strength model and the loads. The results show that the failure probabilities of high-strength concrete columns designed according to the ACI Code are relatively high. The current ACI Code may not be conservative for design of short high-strength concrete tied columns.

Experimental Research on Steel Bar Reinforced High-Strength Concrete Columns

2013 ◽  
Vol 671-674 ◽  
pp. 454-460
Author(s):  
Xiao Dan Fang ◽  
Guan Xin Chen ◽  
Hong Wei ◽  
Zheng Qin Yao
Keyword(s):  
Bearing Capacity ◽  
Experimental Research ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Concrete Column ◽  
Strength Concrete ◽  
Steel Bar ◽  
Practical Engineering ◽  
High Strength Concrete Columns

4 steel bar reinforced high-strength concrete column specimens were tested under axial compression in order to study how different height width ratios, different stirrup ratios and different steel bar reinforcement ratios influence the failure mode of the members and the bearing capacity. Results show that the steel bar reinforced high-strength concrete columns are applicable to practical engineering.

Experimental Study on the Bearing Capacity and Ductility of High Strength Concrete Columns Wrapped with CFRP Cloth

2012 ◽  
Vol 166-169 ◽  
pp. 1333-1336
Author(s):  
Zhong Jun Hu ◽  
Yan Xu
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
High Strength Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Compression Tests ◽  
Strength Concrete ◽  
Axial Compressive Strength ◽  
High Strength Concrete Columns ◽  
Strength And Ductility

By the axial compression tests on a total of 19 high strength concrete columns wrapped with CFRP cloth, the influence of shape section and different layers on the axial compressive strength and ductility is studied. The experimental results indicated: high strength concrete columns wrapped with CFRP in increasing the bearing capacity and ductility of concrete columns is still valid, its effect on the improvement of ductility is much greater than its capacity.

Experimental study on seismic performance of partially precast steel fiber high-strength concrete columns with high-strength steel bars

2021 ◽  
pp. 136943322110115
Author(s):  
Jianwei Zhang ◽  
Deli Zhang ◽  
Xiangyu Li ◽  
Zhaoxv Shen
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
Precast Concrete ◽  
High Strength ◽  
Concrete Columns ◽  
Strength Concrete ◽  
Deformation Ability ◽  
Concrete Shell ◽  
High Strength Concrete Columns

To study the cyclic behavior of partially precast steel fiber high-strength concrete columns with high-strength steel bars, four full-sized square column specimens were fabricated and tested under constant axial load and horizontal cyclic load. The effects of the strength of precast concrete shell and the diameter of cast-in-place column core were analyzed in detail. The results show that partially precast steel fiber high-strength concrete columns have good seismic performance and deformation ability. Compared to the concrete column with lower strength of precast concrete shell, the concrete column with higher strength of precast concrete shell showed higher bearing capacity and energy dissipation capacity while lower ductility. Moreover, with the increase of the diameter of cast-in-place column core, the bearing capacity and the deformation ability of the specimen decreased. Finally, based on the experimental research and theoretical analysis, a calculation model for predicting the maximum bearing capacity was proposed, and the results obtained from the formulas were in good agreement with those from the experiments.

Study on the Behaviors of Steel Reinforced Concrete Cloumns

2011 ◽  
Vol 368-373 ◽  
pp. 248-252
Author(s):  
Bao Sheng Yang ◽  
Yun Yun Li
Keyword(s):  
Bearing Capacity ◽  
Axial Compression ◽  
Compression Ratio ◽  
High Strength Concrete ◽  
Seismic Behavior ◽  
Slenderness Ratio ◽  
High Strength ◽  
Concrete Columns ◽  
Axial Compression Ratio ◽  
High Strength Concrete Columns

The influence on columns behaviors of slenderness ratio are analyzed, and the influence on columns’ anti-seismic behavior of axial compression ratio, stirrup ratio and steel form are analyzed through the test on bearing capacity and level load of low cycle reverse of steel reinforced high-strength concrete columns. The bearing capacity of the long columns reduces along with the slenderness ratio increasing and augments along with concrete strength increasing. Probability of suddenly destruct increases along with the column slenderness ratio augmenting through the test. In addition, anti-seismic behavior of columns are effected not only axial compression ratio, but also steel form. Axial compression coefficien of the steel reinforced high-strength concrete columns with different steel form may be adjusted, however, the influence of stirrup ratio is very little on anti-seismic behavior of columns.

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