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Projects / Programmes source: ARIS

Numerical modeling of low-cycle fatique of stell structures

Research activity

Code Science Field Subfield
2.01.03  Engineering sciences and technologies  Civil engineering  Constructions in civil engineering 

Code Science Field
T230  Technological sciences  Building construction 
Keywords
low-cycle fatigue, steel structures, numerical simulation
Evaluation (rules)
source: COBISS
Researchers (5)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  09378  PhD Darko Beg  Civil engineering  Researcher  2002 - 2004  500 
2.  11536  PhD Jože Korelc  Civil engineering  Head  2002 - 2004  363 
3.  24682  PhD Niko Kristanič  Civil engineering  Researcher  2004  14 
4.  11712  PhD Boštjan Pulko  Civil engineering  Researcher  2002 - 2004  717 
5.  19586  PhD Peter Skuber  Civil engineering  Researcher  2002 - 2004  73 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0792  University of Ljubljana, Faculty of Civil and Geodetic Engineering  Ljubljana  1626981  25,758 
Abstract
Low-cycle fatigue is always present in seismic conditions, thus its influence must be minimised as much as possible. Steel structures are designed to resist seismic actions in such a way that plastic behaviour is allowed in some selected parts in order to dissipate the input energy. Dissipation regions, which very often are frame beams near beam-to-column connections, are subjected to cyclic plastification and consequently to low-cycle fatigue. The goal of the project is to develop a method for numerical modelling of low-cycle fatigue of steel structures. The new method will enable accurate prediction of service life of structures subjected to the low-cycle loading and will not be based on a global deformational quantities. Our intention is to use a constitutive model where elasto-plastic response of steel materials under cyclic loading is modelled by coupling non-linear isotropic and kinematical hardening with damage. The model, previously used for the prediction of low-cycle fatigue of metal forming tools, will be modified in order to describe specific response of mild structural steels and to consider non-linear behaviour of steel structures geometrically. The model will be incorporated into general purpuse finite element envirnoment. Symbolic techniques will be applied for automatic generation of finite element code. This reduces code development efforts and enables researchers to concentrate more on fundamental problems.
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