TY  - JOUR
A1  - Ibanez, Stalin
A1  - Kraus, Matthias
T1  - A Numerical Approach for Plastic Cross Cross-Sectional Analyses of Steel Members
JF  - ce/papers
N2  - Global structural analyses in civil engineering are usually performed considering linear-elastic material behavior. However, for steel structures, a certain degree of plasticization depending on the member classification may be considered. Corresponding plastic analyses taking material nonlinearities into account are effectively realized using numerical methods. Frequently applied finite elements of two and three-dimensional models evaluate the plasticity at defined nodes using a yield surface, i.e. by a yield condition, hardening rule, and flow rule. Corresponding calculations are connected to a large numerical as well as time-consuming effort and they do not rely on the theoretical background of beam theory, to which the regulations of standards mainly correspond. For that reason, methods using beam elements (one-dimensional) combined with cross-sectional analyses are commonly applied for steel members in terms of plastic zones theories. In these approaches, plasticization is in general assessed by means of axial stress only. In this paper, more precise numerical representation of the combined stress states, i.e. axial and shear stresses, is presented and results of the proposed approach are validated and discussed.
KW  - Stahlkonstruktion
KW  - Plastizität
KW  - Strukturanalyse
KW  - Stahlbauteil
KW  - Axialspannung
KW  - Finite-Elemente-Methode
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220112-45622
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/cepa.1527
VL  - 2021
IS  - Volume 4, issue 2-4
SP  - 2098
EP  - 2106
PB  - Ernst & Sohn, a Wiley brand
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kraus, Matthias
A1  - Crişan, Nicolae-Andrei
A1  - Wittor, Björn
T1  - Stability Study of Cantilever-Beams – Numerical Analysis and Analytical Calculation (LTB)
JF  - ce/papers
N2  - According to Eurocode, the computation of bending strength for steel cantilever beams is a straightforward process. The approach is based on an Ayrton-Perry formula adaptation of buckling curves for steel members in compression, which involves the computation of an elastic critical buckling load for considering the instability. NCCI documents offer a simplified formula to determine the critical bending moment for cantilevers beams with symmetric cross-section. Besides the NCCI recommendations, other approaches, e.g. research literature or Finite-Element-Analysis, may be employed to determine critical buckling loads. However, in certain cases they render different results. Present paper summarizes and compares the abovementioned analytical and numerical approaches for determining critical loads and it exemplarily analyses corresponding cantilever beam capacities using numerical approaches based on plastic zones theory (GMNIA).
KW  - Träger
KW  - Stahl
KW  - Biegefestigkeit
KW  - Finite-Elemente-Methode
KW  - Stahlträger
KW  - Knicklast
KW  - Freiträgerkapazität
KW  - Eurocode
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220112-45637
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/cepa.1539
VL  - 2021
IS  - Volume 4, issue 2-4
SP  - 2199
EP  - 2206
PB  - Ernst & Sohn, a Wiley brand
CY  - Berlin
ER  -