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CONFERENCE PROCEEDINGS
6th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2018 , 2018.y., pp. 143-152


INFLUENCE OF THICKNESS OF COLUMNS ON LOCAL BUCKLING-MODE INTERACTION BY FINITE STRIP METHOD AND DUALITY
 
DOI: 10.14415/konferencijaGFS2018.012
UDC: 624.042.072.1:519.6
CC-BY-SA 4.0 license
Author : Milašinović, Dragan D.; Marić, Petar; Živanov, Žarko; Hajduković, Miroslav
 
 Summary:
 A folded plate structure is defined as a prismatic structure which can be formed by folding a flat rectangular plate along lines parallel to its length. The thickness is small compared to its other dimensions and deformations are not large compared to thickness. These structures are particularly useful when the material is a composite laminate. The reason why it is usually more convenient to resort to numerical methods for these structures is that they are used in practical situations where there is a need to introduce irregularities like damage. It is found that a specialized finite element called the finite strip method (FSM) is very powerful, easier to set up, and gives accurate results [1]. In this paper duality of buckling and vibration phenomena is proved for the both elastic and viscoelastic (or damage) structure using rheological-dynamical analogy (RDA). The governing dynamic RDA modulus has been derived in [2]. This paper presents an investigation of influence of thickness of composite thin-walled wide-flange columns on their response for buckling and vibration as well as local buckling-mode interaction. Numerical examples showing the theoretical considerations are presented. A reference Open Source Software implementation for parametric modeling of local buckling and free vibration in prismatic structures is provided. It utilizes task-oriented local-level parallelisms in a form of multithreading/multiprocessing to overpower the increased computational complexity, caused by coupling a high number of series terms within a multi-dimensional parameter sweep (over thickness and length).
 
 Keywords:
 Duality, FSM, RDA, Dynamic RDA modulus, Composite thin-walled wideflange column, multitreding, parallelization