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- 저자 : Querin, (검색결과 3 건)
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FE Model of Three-Dimensional Steel Beam-to-Column Bolted Extended End-Plate Joint
Concepción Díaz,Mariano Victoria,Osvaldo M. Querin,Pascual Martí 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.3
The rotational behaviour of three-dimensional steel end-plate connections can be studied using the fi nite element method for the following four reasons: (1) such models are inexpensive and robust; (2) they allow the understanding of local eff ects; (3) they can be used to generate extensive parametric studies; (4) current version of the component method lacks the appropriate components to predict the behaviour of minor-axis and three-dimensional joints. This work presents a full ANSYS fi nite element parametric model of a three-dimensional steel beam-to-column bolted extended end-plate joint in both axes for use to obtain their behaviour. The model allows to study four joint confi gurations (internal, external, corner, and plane) and includes: contact and sliding between diff erent elements; bolt-pretension, and geometric and material non-linearity. This model was calibrated and validated with experimental results found in the literature. The results from the fi nite element analysis were verifi ed by comparing the obtained moment–rotation curve of the joint. Three parametric studies are presented to show the versatility of the FE model. The results were compared with those obtained with the model proposed by Eurocode 3. The developed ANSYS FE model can be downloaded for free as a single ZIP compressed fi le from the Technical University of Cartagena (UPCT): http://www.upct.es/goe/publi cacio nes/FEM_3D_EEP.zip .
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Optimisation of bridge deck positioning by the evolutionary procedure
Guan, Hong,Steven, G.P.,Querin, O.M.,Xie, Y.M. Techno-Press 1999 Structural Engineering and Mechanics, An Int'l Jou Vol.7 No.6
This paper presents some simple thinking on an age-old question that given a bridge of a certain span and loading, from the point of view of the structural efficiency, where should the bridge deck be positioned? Generally, this decision is made for other reasons than structural efficiency such as aesthetics and the analyst is often presented with a fait accompli. Using the recently invented Evolutional Structural Optimisation (ESO) method, it is possible to demonstrate that having the deck at different vertical locations can lead to a very different mass and shape for each structural form resembling cable-stayed and cable-truss bridges. By monitoring a performance index which is the function of stresses and volume of discretised finite elements, the best optimised structure can be easily determined and the bridge deck positioning problem can be efficiently solved without resorting to any complex analysis procedures.
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Optimization of thin shell structures subjected to thermal loading
Li, Qing,Steven, Grant P.,Querin, O.M.,Xie, Y.M. Techno-Press 1999 Structural Engineering and Mechanics, An Int'l Jou Vol.7 No.4
The purpose of this paper is to show how the Evolutionary Structural Optimization (ESO) algorithm developed by Xie and Steven can be extended to optimal design problems of thin shells subjected to thermal loading. This extension simply incorporates an evolutionary iterative process of thermoelastic thin shell finite element analysis. During the evolution process, lowly stressed material is gradually eliminated from the structure. This paper presents a number of examples to demonstrate the capabilities of the ESO algorithm for solving topology optimization and thickness distribution problems of thermoelastic thin shells.
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