Finite Element Analysis of Polygon Shaped Shell Roof (original) (raw)
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Large span roof shell structures have an inherent tendency to be unstable under dynamic loads. However the dynamic behavior of these is not well documented. An in depth analysis is required to understand its bending, vibration, axial, buckling etc. However, the present investigation focused on free vibration behavior. In this research study, models of spherical single layer reticulated roof shell structures were established in Finite Element software CSi SAP2000. Based on free vibration frequency the dynamic behavior of these structures was investigated in this research paper. Parametric analysis was conducted and the influence of these parameters on the structure was observed in terms of free vibration frequency. Several parameters were considered for the analysis such as, different span diameters, different roof loading and rise to span ratios. Based on the analysis, the optimum rise to span ratio was found out.
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Revista de la Universidad del Zulia, 2022
The development and innovation of Science, specifically in the branch of construction in Civil engineering, has led the implementation of new alternatives in analysis, design and construction of industrial buildings. For this reason, in this research it was proposed to carry out a study of structural behavior of two types of self-supporting roofs: flat and circular, which were analyzed using computational tools for simulation through finite elements, in which initially the structure made up of columns, beams and steel sheets was completely modeled with an equivalent cross section, which made up the self-supporting roofs; then only the steel sheets with real cross section were discretized, and it was noted that in the extremes were the greatest stresses generated by the application of horizontal and vertical loads; and the maximum displacement of the circular roof was 14.32 % of the flat one.
An Efficient Rectangular Flat Shell Finite Element for the Analysis of Thin Shell Structures
2021
Djamal Hamadi , Oussama Temami, Toufik Maalem, Ashraf Ayoub 1LARGHYDE Laboratory, Civil Engineering and Hydraulics Department, Biskra University, Algeria, 2Department of Civil Engineering, Faculty of Technology Science, Mentouri Brothers University, Constantine, Algeria 3 Department of Civil Engineering, Batna 2 University,Algeria. 4School of Mathematics, Computer Science and Engineering, City, University of London, UK. Corresponding Author E-mail: d.hamadi@univ-biskra.dz Corresponding Author ORCID: 000-0002-1990-3192
IJERT-Parametric Study on Behavior of Concrete Shell under Uniform Loading
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/parametric-study-on-behavior-of-concrete-shell-under-uniform-loading https://www.ijert.org/parametric-study-on-behavior-of-concrete-shell-under-uniform-loading Concrete is strong in compression and weak in tension, makes it an elegant choice for a shell roof construction. Concrete shell roofs have been widely used in the construction field for reasons concerning aesthetic appearance or achieving an economical design of a building with large spans. A shell roof, because of its dominant in-plane forces has a distinct behavior compared to flat roof. Membrane forces (In-plane forces) can be characterized into meridional and circumferential (hoop) forces in a doubly-curved shell structure. The shell roof chosen for the current study is a truncated doubly-curved spherical shaped thin-shell with a positive Gaussian curvature.An advanced finite element package ANSYS has been employed for shell modelling and analysis. A suitable 8 node quadratic shell element has been used for finite element modelling of shell surface. Ten doubly-curved spherically shaped domes have been modelled and analyzed in ANSYSWorkbench. The behavior of shell roof changes as its rise changes. A parametric study is done varying the rise to span ratio of a flat roof to that of a hemispherical dome in static loading conditions.The theoretical validation is found to be in good agreement with ANSYS models. The study circumscribes the behavioral aspects of a spherical thin shell roof accounting various rise to span ratios.
Analysis of Open Circular Reinforced Concrete Shell Roof with Curved Edge Simply Supported
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This paper deals with the analysis of open circular reinforced concrete shell roof with curved edge simply supported. The MATLAB coding is performed using classical theory and Scordelis-Lo-barrel roof problem is used to validate the classical problem. This roof is also modeled in finite element software SAP2000 and the comparison is done between classical and numerical method. Then boundary condition is changed and edge beam is provided along straight edge. The structure is analyzed using Chandrasekhara theory and using Scholar theory, the effect of using membrane solution as particular solution is analyzed. This roof is also modeled in SAP2000 and the comparison is done between classical and numerical method again.Further, Schorer theory, where membrane force are used as particular integral for solution of eighth order system of differential equations and difference between the results obtained by using membrane forces as particular integral has been found to be within permissible ...