Structural Engineering and Mechanics

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Interval finite element analysis of masonry-infilled walls

  • Erdolen, Ayse (Civil Engineering Department, Yildiz Technical University, Davutpasa Campus) ;
  • Doran, Bilge (Civil Engineering Department, Yildiz Technical University, Davutpasa Campus)
  • Received : 2012.02.08
  • Accepted : 2012.08.09
  • Published : 2012.10.10
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Abstract

This paper strongly addresses to the problem of the mechanical systems in which parameters are uncertain and bounded. Interval calculation is used to find sharp bounds of the structural parameters for infilled frame system modeled with finite element method. Infill walls are generally treated as non-structural elements considerably to improve the lateral stiffness, strength and ductility of the structure together with the frame elements. Because of their complex nature, they are often neglected in the analytical model of building structures. However, in seismic design, ignoring the effect of infill wall in a numerical model does not accurately simulate the physical behavior. In this context, there are still some uncertainties in mechanical and also geometrical properties in the analysis and design procedure of infill walls. Structural uncertainties can be studied with a finite element formulation to determine sharp bounds of the structural parameters such as wall thickness and Young's modulus. In order to accomplish this sharp solution as much as possible, interval finite element approach can be considered, too. The structural parameters can be considered as interval variables by using the interval number, thus the structural stiffness matrix may be divided into the product of two parts which correspond to the interval values and the deterministic value.

Keywords

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