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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...
Optimization of geometric parameters of latticed structures using genetic algorithm
, Article Aircraft Engineering and Aerospace Technology ; Volume 83, Issue 2 , 2011 , Pages 59-68 ; 00022667 (ISSN) ; Kargarnovin, M. H ; Jam, J. E ; Sharif University of Technology
2011
Abstract
Purpose - The purpose of this paper is to analyze a squared lattice cylindrical shell under compressive axial load and to optimize the geometric parameters to achieve the maximum buckling load. Also a comparison between buckling loads of a squared lattice cylinder and a solid hollow cylinder with equal weight, length and outer diameter is performed to reveal the superior performance of the squared lattice cylindrical shells. Design/methodology/ approach - A cylindrical lattice shell includes circumferential and longitudinal rods with geometric parameters such as crosssection areas of the rods, distances and angles between them. In this study, the governing differential equation for buckling...