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rasekh--a
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Numerical analysis of PZT-polymer composites using pb-3 Ritz method
, Article Fifth International Conference on Computational MEthods and Contact Mechanics, Contact Mechanics 2001, Seville, 18 June 2001 through 20 June 2001 ; Volume 5 , 2001 , Pages 293-305 ; 1853128643 (ISBN) ; Kamali, M. T ; Rasekh, A ; Sharif University of Technology
2001
Abstract
An energy based formulation of piezocomposites and a general 3-dimensional Ritz method for the analysis of piezocomposite solids of arbitrary shape and arbitrary width to thickness ratio are developed. The displacement fields and the electric potential function are approximated using special base functions, which satisfy boundary conditions through pb-3 method. Furthermore, an innovative remedy will be given to treat the problem of the discontinuities in strain fields and in electric displacement across the interfaces. An important feature of the present method is that, it can be used to analyze arbitrary shaped piezoelectric plates with high accuracy without the need of mesh generations and...
Adaptive pushover analysis
, Article 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010, Bangkok, 3 August 2006 through 5 August 2006 ; Volume 3 , 2006 , Pages 453-458 ; 9748257231 (ISBN); 9789748257235 (ISBN) ; Rasekh, A ; Shodja, A. H ; Khajeh Ahmad Attari, N ; Sharif University of Technology
2006
Abstract
Nonlinear static methods are simplified procedures in which the problem of evaluating the maximum expected response of a MDOF system for a specified level of earthquake motion is replaced by response evaluation of its equivalent SDOF system. The common features of these procedures are the use of pushover analysis to characterize the structural system. In pushover analysis both the force distribution and the target displacement are based on the assumptions that the response is controlled by the fundamental mode and that the mode shape remains unchanged after the structure yields. Therefore the invariant force distributions does not account for the change of load patterns caused by the plastic...