scholarly journals Strength and Ductility of Stiffened Steel Box Columns of Various Cross-Sectional Configurations under Lateral Cyclic Loadings

2021 ◽  
Vol 54 (2) ◽  
pp. 25
Author(s):  
T. Thevega ◽  
K. Rajavijayan ◽  
J. A. S. C. Jayasinghe ◽  
K. A. S. Susantha
Keyword(s):  
Cross Sectional ◽  
Stiffened Steel ◽  
Box Columns ◽  
Strength And Ductility

Stiffened steel box columns. Part 2: Ductility evaluation

2000 ◽  
Vol 29 (11) ◽  
pp. 1707-1722 ◽  
Author(s):  
Tsutomu Usami ◽  
Shengbin Gao ◽  
Hanbin Ge
Keyword(s):  
Stiffened Steel ◽  
Box Columns

scholarly journals Strength and Ductility of Bubbled Wide Reinforced Concrete Beams with Diverse Types of Shear Steel Plates

2018 ◽  
Vol 7 (4.20) ◽  
pp. 502 ◽  
Author(s):  
Amer Mohamed Ibrahim ◽  
Ahmed Abdullah Mansor ◽  
Wissam D. Salman ◽  
Mohammed Jaafar Hamood
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Concrete Beams ◽  
Good Alternative ◽  
Reinforced Concrete Beams ◽  
Steel Plates ◽  
Cross Sectional ◽  
Service Load ◽  
Different Types ◽  
Strength And Ductility

This paper presents an experimental investigation on the strength of bubbled wide reinforced concrete beams with different types of shear steel plates. Eight specimens with dimensions of 215x560x1800mm were investigated. The studied variables deal with replacement of 10mm stirrups diameter stirrups spaced at 125mm by shear steel plates having equivalent cross-sectional area for stirrups at mid legs height with circular opening of different thicknesses (3, 4 and 5mm). Four specimens were without any bubbles and the others with bubbles. This study showed that the shear steel plates is a good alternative for replacing the stirrups and gives increasing in yield, ultimate load and deflection (at service load) with 5% , 15% and 9% on the average when using the bubbles. Without using bubbles, the aspect ratio of shear steel plates bounded between the boundaries 4.5 to 8 gave increased the ductility by 36%. Using the bubbles in specimens was decreased 4.7% from the total weight of specimens. ACI 318-14(1) and EC 2(2) codes give a predicted deflection more than that obtained from experimental results by 16% on the average and by 24% when using bubbles.    

Axial Load Behavior of Rectangular CFT Stub Columns with Binding Bars

2007 ◽  
Vol 10 (5) ◽  
pp. 551-565 ◽  
Author(s):  
Jian Cai ◽  
Yue-Ling Long
Keyword(s):  
Ultimate Strength ◽  
Axial Load ◽  
Local Buckling ◽  
Concrete Core ◽  
Cross Sectional ◽  
Composite Columns ◽  
Proposed Model ◽  
Load Behavior ◽  
Stub Columns ◽  
Strength And Ductility

This paper presents an experimental study on the axial load behaviour of rectangular concrete-filled steel tubular (R-CFT) stub columns with binding bars. Eight specimens were concentrically loaded in compression to failure in order to investigate the effects of the binding bars, depth-to-wall thickness ratio and cross-sectional aspect ratio on the ultimate strength and ductility of the composite columns. Experimental results indicate that the binding bars increase the confinement of the concrete core and delay local buckling of the tube. The results also show that R-CFT columns with binding bars have better ductility than those without binding bars. A model is proposed to predict the ultimate strength of the specimens. A comparison of the ultimate strengths between tests and design codes shows that the proposed model gives reasonable predictions of the ultimate strength of rectangular CFT stub columns with binding bars while the codes EC4 (1996), AIJ (1997) and GJB (2001) conservatively estimate the ultimate strength by 17.6%, 22.9% and 9.7% respectively.

Size effect on axial behavior of concrete-filled box columns

2018 ◽  
Vol 21 (13) ◽  
pp. 2068-2078 ◽  
Author(s):  
Ming-Chang Wu ◽  
Chien-Chung Chen ◽  
Cheng-Cheng Chen
Keyword(s):  
Finite Element ◽  
Size Effect ◽  
Axial Loading ◽  
Element Analysis ◽  
Cross Sectional ◽  
Practical Applications ◽  
Axial Capacity ◽  
Current Design ◽  
Axial Behavior ◽  
Box Columns

The use of concrete-filled box columns could provide an economical alternative to building and bridge construction. Past experimental results showed that current building codes provided an adequate accuracy in determining axial capacity of such composite members. However, the sizes of the previously studied test specimens were mostly smaller than those for practical applications. As the column size increases, the size effect may become significant. Therefore, the applicability of extrapolating those test results to larger concrete-filled box columns needs to be justified. This study was devoted to investigating the potential size effect on axial behavior of concrete-filled box columns. Six short square concrete-filled box columns, with cross-sectional dimensions ranging from 300 to 750 mm, were tested under axial loading. Comparisons between experimental and analytical results were presented. It was observed that the size effect was prominent for the concrete-filled box columns studied herein. The results of this study showed that current design codes overestimated the axial capacity of the test columns with a dimension of 750 mm. In addition, finite element simulations of the axially loaded specimens were conducted to investigate the stress–strain behaviors of the concrete enclosed in different sizes of steel box columns. Results from the finite element analysis suggested that the larger steel box columns were less effective in enhancing the compressive strength of the enclosed concrete than smaller steel box columns.

scholarly journals A comparative study on three different construction methods of stiffened plates-strength behaviour and ductility characteristics

2007 ◽  
Vol 60 (2) ◽  
pp. 365-379
Author(s):  
Mohammad Reza Khedmati ◽  
Khosrow Ghavami ◽  
Mehran Rastani
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Compressive Load ◽  
Steel Plates ◽  
Stiffened Plates ◽  
Construction Methods ◽  
Inland Waterway ◽  
Stiffened Steel ◽  
Continuous Chain ◽  
Strength And Ductility

Strength and ductility characteristics of non-continuously welded stiffened plates under in plane axial compression are the main focus of this research. A series of detailed numerical analyses of stiffened steel plates subjected to in plane compressive load is performed. Complete equilibrium paths are traced up to collapse for non-linear elastoplastic response of stiffened plates. Stiffened plates are selected from the deck structure of real sea-going ships and inland waterway vessels. Three different stiffener-to-plate welding procedures are considered: continuous, chain intermittent and staggered intermittent fillet welding. Special attention is paid to the finite element modeling of the fillet welds in either of welding practices. Some available tests are simulated applying finite element method.

Shear Isolation Design under Reinforced Blockade

2014 ◽  
Vol 716-717 ◽  
pp. 406-409
Author(s):  
Shui Jiang Wang
Keyword(s):  
Architectural Design ◽  
Shear Wall ◽  
Cross Sectional ◽  
Original Shape ◽  
Shear Cracking ◽  
Sectional Shape ◽  
Isolation Performance ◽  
Hysteresis Characteristics ◽  
Strength And Ductility ◽  
Better Than

In the process of architectural design, sectional shape is used instead of original shape. Shear isolation design combined with reinforced blockade, make up for the lack of original wall bearing capacity, stiffness and ductility, energy, lack of hysteresis characteristics. In order to determine the effectiveness of shear isolation design under reinforced blockade. Building shear cracking damage experiment is performed. The results show that cross-sectional shape and reinforced shear wall buildings blockade isolation performance was significantly better than the original shape of the shear wall design, reinforced blockade is significantly enhanced, strength and ductility effect are dramatically improved.

scholarly journals X.—The Influence of the Ratio of Width to Thickness upon the Apparent Strength and Ductility of Flat Test-bars of Mild Steel

1912 ◽  
Vol 48 (1) ◽  
pp. 195-214
Author(s):  
W. Gordon ◽  
G. H. Gulliver
Keyword(s):  
Tensile Strength ◽  
Mild Steel ◽  
Large Class ◽  
Maximum Load ◽  
Sectional Area ◽  
Engineering Structures ◽  
Cross Sectional ◽  
Heavy Loads ◽  
Measured Length ◽  
Strength And Ductility

In a large class of engineering structures it is essential that the materials employed should be both strong and ductile, so that not only shall the structure be able to resist heavy loads, but that if by any chance it is overloaded it shall not collapse suddenly. In order to ascertain whether a metal is suitable for a particular structure, its strength and ductility are determined experimentally. The test most commonly in use consists in applying a gradually increasing pull to a bar of the metal until fracture takes place. The maximum load supported per unit of the original cross-sectional area of the bar is called the tensile strength or tenacity of the metal, and the elongation of an initial measured length, expressed as a proportion of that length, is called the extension, and is used as an index of the ductility of the metal.

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