Effect of Sectional Modulus on Universal and Hollow Steel Columns Subjected To Flexure (original) (raw)
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Effect of Sectional Modulus on Universal and Hollow Steel Columns Subjected To Flexure Authors
The sectional modulus of rolled universal and circular hollow steel section columns in BS 5950(2000) was investigated in order to determine the safety of the available section modulus when subjected to flexure. The BS 5950 (2000) was evaluated in the light of Load Resistance Factor Design (LRFD) (1999) of the American Institute of Steel Constructions (AISC) due to their similarities. Results indicate that the safety levels of UC and CHS steel columns varies with the amount of sectional modulus available in flexure while the safety values to be used which depend extensively on column sections are predicted in each column type.
IJERT-Effect of Sectional Modulus on Universal and Hollow Steel Columns Subjected To Flexure
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/effect-of-sectional-modulus-on-universal-and-hollow-steel-columns-subjected-to-flexure https://www.ijert.org/research/effect-of-sectional-modulus-on-universal-and-hollow-steel-columns-subjected-to-flexure-IJERTV2IS90661.pdf The sectional modulus of rolled universal and circular hollow steel section columns in BS 5950(2000) was investigated in order to determine the safety of the available section modulus when subjected to flexure. The BS 5950 (2000) was evaluated in the light of Load Resistance Factor Design (LRFD) (1999) of the American Institute of Steel Constructions (AISC) due to their similarities. Results indicate that the safety levels of UC and CHS steel columns varies with the amount of sectional modulus available in flexure while the safety values to be used which depend extensively on column sections are predicted in each column type.
ANALYTICAL STUDY ON LIGHT GAUGE STEEL HOLLOW FLUTED COLUMNS UNDER AXIAL LOADING
Cold-Formed Steel Columns (CFSC) have provided its usefulness in the structural applications of the constructions like individual structural framing members and panel decks. The advantage of cold rolled steel is that it can be utilized for the production of elements with required shape to length of required dimensions. High strength to weight ratio is achieved in cold-rolled products. In this project, an attempt has been made in order to investigate the axial load behavior of light gauge steel hollow fluted column. The behavior of columns is evaluated both theoretically and analytically using ANSYS and the results are compared. In the analytical work, nine sections were axially loaded and their corresponding axial shortening values are noted. From the results it is evident that at any particular load, the sections with flutes will have less axial shortening than sections without flutes and the axial shortening for rectangular fluted column (RFC) is less when compared to triangular fluted columns (TFC).The hollow columns (HC) having lesser seismic mass and the fluted columns with high strength and stiffness in combination with cold rolled steel structures makes the structure safer.
Flexural Buckling of Hot-Finished High-Strength Steel SHS and RHS Columns
Journal of Structural Engineering
An experimental and numerical study of the flexural buckling behavior of hot-finished high strength steel (HSS) square and rectangular hollow section (SHS and RHS) columns is described in this paper. A total of 30 hot-finished S460 and S690 hollow section column specimens have been tested in compression with pin-ended boundary conditions. Finite element (FE) models have been developed to replicate the experiments, and employed in a subsequent parametric study considering a range of member geometries. Based on the test and FE results, the applicability of the current column design curves in European, North American, Chinese and Australian structural steel design standards to hot-finished HSS SHS and RHS columns has been verified by means of reliability analyses.
Behaviour Of Steel Plates Under Axial Compression And Their Effect On Column Strength
An experimental study is conducted to investigate the behavior and postbuckling strength of plate elements in square and rectangular steel hollow sections having width-thickness ratios more than that in common rolled sections and their effect on the strength of columns. Two types of stub columns are tested under axial compression until failure; ordinary tubes and tubes reinforced by longitudinal stiffeners.
Castellated and common cruciform steel columns under axial and lateral cyclic loading
Asian Journal of Civil Engineering, 2018
A numerical study has been done on the strength and hysteresis behavior of castellated and common cruciform steel columns under axial and lateral cyclic loading. The main feature of the castellation method is to make the I-sections stiffer by increasing the web height and reaching the higher moment capacity from the initial axis of the same weight of plain webbed members, and optimizing the use of heavy and costly constructional steel material and providing access to appropriate services. The effect of types of steel sections, web and flange boost of steel section, and length variations of specimens have been investigated and deformation, bearing capacity, hysteresis loops, ductility, and energy dissipation capacities have been discussed. Finite element analysis is performed based on initial geometric imperfection and geometric nonlinearity. The results of finite element analyses are close to the experimental results and showed that load carrying capacity of castellated cruciform st...
Frattura ed Integrità Strutturale, 2021
In this experimental work, strength results obtained on short columns subjected to concentric loads are presented. The specimens used in the tests have made of cold-rolled, thin-walled steel. Twenty short columns of the same cross-section area and wall thickness have been tested as follows: 8 empty and 12 filled with ordinary concrete. In the aim to determine the column section geometry with the highest resistance, three different types of cross-sections have been compared: rectangular, I-shaped unreinforced and, reinforced with 100 mm spaced transversal links. The parameters studied are the specimen height and the cross-sectional steel geometry. The registered experimental results have been compared to the ultimate loads intended by Eurocode 3 for empty columns and by Eurocode 4 for compound columns. These results showed that a concrete-filled composite column had improved strength compared to the empty case. Among the three cross-section types, it has been found that I-section rei...
Behaviour and design of fixed-ended steel equal-leg angle section columns
Journal of Constructional Steel Research, 2021
The mechanical behaviour and design of fixed-ended steel equal-leg angle section members subjected to axial compression are addressed in this study. First, the critical buckling behaviour is described. Experimental data on steel equal-leg angle section columns collected from the literature are then used for the validation of numerical (shell finite element) models, developed within the commercial package ABAQUS. Validation is performed by means of comparisons between test and numerical results, considering ultimate loads and failure modes, all of which are shown to be generally in good agreement. A numerical parametric study is then presented considering steel angle section columns with a wide range of slenderness values. The behaviour and load-carrying capacity of the columns is shown to be dependent on, not only the column slenderness, but also the ratio of the elastic torsional-flexural buckling load to the elastic minor-axis flexural buckling load. Finally, the collected experimental and generated numerical results are used to develop a new design approach, suitable for incorporation into future revisions of Eurocode 3, for fixed-ended steel equal-leg angle section columns, reflecting the observations made. The proposed approach offers improved accuracy and consistency in strength predictions compared to the existing codified design rules. The reliability of the new design approach, with a recommended partial safety factor γ M1 = 1.0, is verified following the EN 1990 procedure.
Reliability Investigation of Steel Cased Columns
Australian Journal of Basic and Applied Sciences, 2007
Reliability analysis of steel cased columns designed in accordance with BS5950 was 1 carried using First Order Reliability Method (FORM). Design variables such as design axial load and moment, concrete strength, yield strength of steel, cross-sectional dimensions of the plate and universal column, as well as thickness of the base plate were considered random and stochastic. It was y shown among other findings that, as the material strength P was increased, the safety of the designed section considering axially loaded decreased. However, considering combined axial load and bending condition, as the material strength was increased, the safety of the section increased. It was also shown that applied bending moment has more significant effect on concrete strength of the cased column than on steel strength.
In this study main attention is focused on axial load carrying capacity of steel columns. Towards this aim, employing nonlinear geometric and material properties Finite Element models are generated using ANSYS program. In simulations due to its advantages Arc-Length method is utilized for determination of axial load capacity of columns. Computational study consists of four phases. In the first one nonlinear bucking loads of IPE 200 section are evaluated for different slenderness ratios (L/ry). Obtained results for different slenderness ratios are assessed against LRFD and Eurocode-3 specifications. In the second section geometrical imperfections are incorporated into column models in a systematic manner and capacity changes are evaluated. Effects of eccentric compression loadings on the axial load carrying capacity are studied in third section. Fourth section introduces the effects of combined geometrical imperfections and eccentric loadings