Influence of Opening Type in Axially Compressed Castellated Columns (original) (raw)
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Experimental investigation on buckling analysis of castellated column with software
International Journal of Advance Research and Innovative Ideas in Education, 2017
Perforated-web steel sections have been used as structural members since the Second World War in an attempt to enhance the flexural behavior without increasing the cost of the material. Nowadays, such sections are widely used in a variety of geometries suitable for various loading conditions. The study considers a wide range of practical geometric dimensions, as well as, various columns' end conditions. Due to the increase in width of column the radius of gyration of column increase and the slenderness ratio of column get reduce. Due to this effect the buckling load carrying capacity of column increase. Castellated column is defined as the column in which increasing width of column without increasing the self-weight of column. Now a day castellated column is a new technique. A castellated column is fabricated from a standard steel I-shape by cutting the web on a half hexagonal line down the center of the beam. The two halves are moved across by one spacing and then rejoined by welding. This process increases the width of the column and hence the major axis bending strength and stiffness without adding additional materials. Due to the opening in the web, castellated column are more susceptible to lateral-torsional buckling. The main benefit of using a castellated column is to increase its buckling resistance about the major axis. However, because of the openings in the web, castellated columns have complicated sectional properties, which make it extremely difficult to predict their buckling resistance analytically.
IRJET- Geometrical Optimization and Buckling Analysis of Castellated Steel Column
IRJET, 2020
This paper presents design and study of the buckling behavior of castellated columns members and the critical load capacity of the section at various end conditions. Different shapes of the openings are taken into account for creation of castellated column. In this paper, the critical load capacity of the section at various end conditions also studied. Linear buckling analysis has done using ANSYS Workbench for different parameters of castellated column. Hexagonal openings were provided as opening on the web post of the column. Unit load is applied at free end. Total deformation and equivalent stress was obtained at nodes, with eigenvalues buckling load multiplier were obtained. From analysis critical buckling load was obtained as 147.72 KN. This load is greater than calculated critical load 122.90 KN. On applying this load to the system, equivalent stress is obtained as 26.336 MPa.
Design of Castellated Column in Finite Element Analysis
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2023
Castellated columns have been utilised extensively in steel constructions and structures. When compared to conventional I-section structural components, castellated structural components have a greater capacity for bending along their primary axes and can withstand greater flexural buckling. With the aid of FE analysis, the study sought to examine the strength and buckle behaviour of axially loaded tapered castellated cruciform steel columns. Although there is a sizable amount of study on the failure of various columns, no suitable standard has been developed to recognize the point of buckling in the equilibrium path of a deficient column. The analysis discussed in this manuscript takes into description a multiplicity of useful geometric dimensions and fix to fix ends conditions by the application of ABAQUS softwares
Recent research activities on column behaviour with special emphasis on distortional buckling
The behaviour and ultimate strength of thin-walled steel lipped C-section columns under concentric axial compressive loading are examined by using finite element analysis. ABAQUS (2009), a general purpose Finite Element (FE) Analysis program has been used for the purpose. Two types of analysis were carried out to study the column stability and strength. First, eigenvalue buckling analysis was carried out to obtain relevant buckling modes. Secondly, non-linear analysis was carried out using the mesh and imperfections suggested by the eigenvalue analysis. Riks method was used for the non-linear load-displacement analysis to handle possible instabilities that the member would suffer due to the presence of initial geometric and material imperfections. Three different column lengths were adopted and the above analyses were carried out on these columns with and without perforations and with varying degrees of initial geometric imperfections. Non-linear load-displacement curves are provided for these various cases and ultimate strengths achieved for the models are used to compare with available design approaches.
Experimental And Numerical Investigation Of The Behavior Of Castellated Steel Beam-Columns
International Journal of Scientific & Technology Research, 2021
Experimental investigation has been performed on twelve short and long castellated beam-column elements. The castellation process effectively increases the section resistance because of increasing the depth of the section without any additional weight. By increasing the depth of the beam, major axis bending resistance and stiffness are improved as the major axis moment of inertia (Ix) and the section modulus (Sx) are increased. It has been noticed that, researches that considered castellated elements subjected to axial and bending moment are limited compared to those considered elements subjected to bending moment only. In this research castellated beam-columns are studied under different load eccentricity to investigate the effect of castellation on beam-column strength. Behavior and strength of castellated beam-column are also investigated using the finite element analysis utilizing ANSYS software. The finite element results are found to be in a good agreement with their experimental counterparts.
International Journal for Research in Applied Science and Engineering Technology IJRASET, 2020
Buckling analysis is particularly important for steel structures because they are slender sections. Buckling occurs suddenly and cause system to collapse. Now a days tapered structural members are used for the stability purpose. Non-prismatic members are popular for civil engineering structures and certain benefits in terms of efficiency in material consumption and better steel utilization can be achieved by using tapered members. This study deals with the axial load performance of web tapered I-section steel column. The column is axially loaded by keeping overall weight of the column constant. The study focused on analysis of non-prismatic column with different taper ratio and the best model was fixed. Two different shape such as L-shape and V-shape were used for taper ratio study. The effect of using different hollow flange shapes such as rectangular, trapezoidal, and tubular on tapered steel column were also studied. A non-linear finite element model using ANSYS 16.1 has been adopted to investigate axial load behaviour of tapered column section. The result was analysed to determine buckling behaviour of tapered column section.
General buckling analysis of steel built-up columns using finite element modelling
Engineering Structures and Technologies, 2012
The paper investigates the general buckling of an axially loaded column using the finite element method with different slenderness ratios of axes x-x and z-z. The paper deals with three different modes of buckling. The conducted numerical experiments have suggested correction factors and appropriate buckling modes of the built-up columns. The obtained modelling results were compared with data on analytical calculations made according to Lithuanian national codes STR and Eurocode 3. The FEM analysis of the builtup column has showed that both codes (STR and EC3) are giving safe enough results for a considered type of conditions for column support. Santrauka Straipsnyje nagrinėjami plieninių spragotųjų kolonų elgsenos ypatumai, atsižvelgiant į skirtingas STR 2.05.08:2005 ir EC3-1-1 metodikas. Didžiausią susidomėjimą kelia faktas, kad, taikant EC3 metodiką, nėra nagrinėjama spragotosios kolonos kluptis apie didesnio standumo x-x ašį (1 pav.). Naudojantis turima ir kitų autorių patirtimi...
Buckling performance of thin-walled filled steel columns
Turkish journal of engineering, 2023
Axial load Buckling Column FEA Concrete-filled composite elements have recently gained popularity as beams and columns all over the world. They have advantages similar to reinforced concrete elements, such as the moulding process and the lack of maintenance of the filled concrete, as well as advantages similar to hollow steel elements, such as enhancing compressive strength and bending capacity by using smaller sections. In this paper, the buckling behaviour of thin-walled steel columns with circular cross-section and different filling materials was investigated under uniaxial load. Six different materials (concrete produced using normal aggregate, concrete produced using waste aggregate, waste fine aggregate, waste coarse aggregate, waste iron dust and polyurethane) were used as filling. Filled columns were compared experimentally with hollow thin-walled steel columns that had the same height and diameter. All specimens had the same length (750 mm), same diameter (60.3mm) and the same wall thickness (3mm). Experimental results were compared with analytical results obtained from a calculation done using the national steel design code, Design, Calculation and Construction Principles of Steel Structures 2016. Additionally, columns specimens were modelled in Abaqus software. Conservative and consistent results were obtained from comparing experimental, analytical, and numerical results.
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...