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Analysis of concrete shallow funicular shells of rectangular plan
, Article Curved and Layered Structures ; Volume 6, Issue 1 , 2019 , Pages 229-235 ; 23537396 (ISSN) ; Rasouli, E ; Mofid, M ; Sharif University of Technology
De Gruyter Open Ltd
2019
Abstract
Analysis of concrete shallow funicular shells of rectangular plan with simply supported boundary conditions under static loads is performed using the Ritz method. Double Fourier series with the unknown constant coefficients are assumed for the displacement components of the shell and their unknown coefficients are determined such that the potential energy of the shell becomes minimum. The solution is presented in a simple form and is suitable for practical applications. The responses of rectangular-plan concrete shallow funicular shells including deflections, strains, internal forces, internal moments and stresses could be easily determined using the proposed semi-analytical method. The Ritz...
Analysis of concrete shallow funicular shells of rectangular plan
, Article Curved and Layered Structures ; Volume 6, Issue 1 , 2019 , Pages 229-235 ; 23537396 (ISSN) ; Rasouli, E ; Mofid, M ; Sharif University of Technology
De Gruyter Open Ltd
2019
Abstract
Analysis of concrete shallow funicular shells of rectangular plan with simply supported boundary conditions under static loads is performed using the Ritz method. Double Fourier series with the unknown constant coefficients are assumed for the displacement components of the shell and their unknown coefficients are determined such that the potential energy of the shell becomes minimum. The solution is presented in a simple form and is suitable for practical applications. The responses of rectangular-plan concrete shallow funicular shells including deflections, strains, internal forces, internal moments and stresses could be easily determined using the proposed semi-analytical method. The Ritz...
On the Dynamic Response of Funicular Shells and Evaluation of the Behavior Factor
, M.Sc. Thesis Sharif University of Technology ; Mofid, Masoud (Supervisor)
Abstract
Dynamic behavior of space structures are of great complexities. On the event of severe earthquake these structures exhibit high resistance and on the other hand, their high rigidity and small deformation makes it necessary to pay attention to their dynamic behavior, especially when combined with other types of structural systems. Also due to lack of sufficient codes and references, their dynamic behavior is still unknown to a great extend. Among these kinds of structures, reinforced concrete double curvature shells, and especially funicular shells, are much more important than others. In this thesis, dynamic response of these kind of structures, especially reinforced concrete domes, in...
Dynamic Response of Concrete Funicular Shells under Impulse Loads
, M.Sc. Thesis Sharif University of Technology ; Vafai, Abolhassan (Supervisor) ; Mofid, Massoud (Co-Advisor)
Abstract
Reinforced concrete shells are widely used to cover the small to large area with more aesthetics at minimum cost. Shell structures carries load through their shape rather than material strength. Funicular shells are special type of shells that their shape is obtained so that stresses be compressive under a special load (for shell, this load is its dead weight). This study deals with forced vibration of funicular shells on a rectangular ground plan under impulse loads using shallow shells theory. Two boundary conditions, simply supported and clamped, are considered. Displacement components are product of position and time functions. The analysis is based on the expansion of displacement...
Investigation of Seismic Response of Circular-Plan Concrete Funicular Shells
, M.Sc. Thesis Sharif University of Technology ;
Abstract
The present study considers the performance of circular-plan concrete funicular shells due to seismic loads for simply boundary conditions. Vibration frequencies of these shells along with their seismic responses included displacement and stresses generated in them due to the acceleration components of Tabas and Manjil earthquakes are determined via the use Abaqus software. Frequencies of vibration determined with software are compared with the results of a semi-analytical model where good agreement is achieved.The results of the performed analyses for vibration frequencies show that both of the reduction of the base diameter and the incerese of the rise increase the frequencies of...
Experimental study of prefabricated funicular shell units
, Article Proceedings of the Institution of Civil Engineers: Structures and Buildings ; Volume 158, Issue 3 , 2005 , Pages 167-174 ; 09650911 (ISSN) ; Estekanchi, H. E ; Javidruzi, M ; Sharif University of Technology
ICE Publishing Ltd
2005
Abstract
Prefabricated funicular shells were constructed using a stretched membrane as a mould. Forty-five shells with various rises and different types of reinforcement were loaded to failure and their behaviour in the elastic and non-linear range was investigated. The experimental values of membrane and bending stresses in the elastic range along diagonal sections of funicular shells subjected to uniform loading were calculated and compared with the results of numerical analysis. The results are generally found to be in close agreement with theory. Experimental values of vertical deflections along the longitudinal and transverse sections of the shells also compare favourably with the theory. The...
Geometrically Nonlinear Vibration of Concrete Funicular Shells Under Impulse Loads
, M.Sc. Thesis Sharif University of Technology ; Mofid, Massoud (Supervisor)
Abstract
Reinforced concrete shells are widely used to cover the small to large area with more aesthetics at minimum cost. Shell structures carry load through their shape rather than material strength. Funicular shells are special type of shells that their shape is obtained so that stresses be compressive under a special load (for shell, this load is its dead weight). This study deals with geometrically nonlinear vibration of funicular shells on a rectangular ground plan under impulse loads using nonlinear shallow shells theory. The boundary conditions are considered as clamped edges. Displacement components are product of position and time functions. The analysis is based on the expansion of...