modelling of structures and numerical simulation
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Modelling of Structures and Numerical SimulationTRANSCRIPT
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
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Modeling of Structures and
Numerical Simulation
Frank Scheiber, M.Sc.
Department of Steel Structures
Research Training Group 1462 – Model Quality Assessment
Berkaer Straße 9
Tel.: 03643 – 584112
E-Mail: [email protected]
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
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Course times: Wednesday: 11:00 – 12:30
Wednesday: 13:30 – 15:00
Lectures: room 205
Seminars: pool luna blue
Examination requirement: weekly tasks
Examination: 3 hours written exam
Lectures: Prof. Dr.-Ing. habil. Frank Werner
Department of Steel Structures
Marienstraße 7a (Room 308)
Tel.: 03643 – 584444
E-Mail: [email protected]
Seminars: Frank Scheiber, M.Sc.
Research Training Group 1462 – Model Quality
Berkaer Straße 9
Tel.: 03643 – 584112
E-Mail: [email protected]
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
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Content of the course:
Lectures: Theoretical background
Different models and there application
Geometric nonlinearities
Modeling of imperfections
Modeling and calculation of frames
Lateral torsional buckling
Warping torsion
Buckling of plates
Seminars: Practical application with software tools
Introduction to different software tools
Calculation of eigenmodes and eigenvalues
Modeling of frame structures
Lateral torsional buckling with software tools
Introduction to Finite-Elements
Buckling problems with Finite-Elements
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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.Sc.
Reality – Model – Code
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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Reality Engineering model
a) b) c) d)
Critical load – Engineering model: Steel S235, IPE 300, l = 2,90 m
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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Basement: Eurocode – DIN EN 1993
• current code for design of steel structures in the European Union
• mostly based on the old German code – DIN 18800
• general document for whole Europe + National annex for each
country
• English version available in library
DIN EN 1993 - 743864077
DIN EN 1993/NA - 743864654
Most of the hand calculations in the seminars and
examination are related to the code.
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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rtm
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t o
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Fra
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.Sc.
Stability failures of beams
Easiest way = Equivalent beam method
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
pa
rtm
en
t o
f S
tee
l S
tru
ctu
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8
Fra
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eib
er, M
.Sc.
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
pa
rtm
en
t o
f S
tee
l S
tru
ctu
res
9
Fra
nk S
ch
eib
er, M
.Sc.
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
pa
rtm
en
t o
f S
tee
l S
tru
ctu
res
10
Fra
nk S
ch
eib
er, M
.Sc.
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
pa
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t o
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l S
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Fra
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.Sc.
Experimental data as background of the buckling curves
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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t o
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Fra
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.Sc.
Limits of equivalent beam theory:
Possible theories for this systems:
- Tapered beams
- Cross sections with different flange areas
- Complex structures
- Second Order Analysis – elastic
predeformation of the structural model
iterative system analysis
limitation of allowable stresses
- Second Order Analysis – elastic-plastic
plastic hinges after exceeding the stress limit state
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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.Sc.
Limit states of a structure
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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t o
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Fra
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mit:
m = Number of loaded columns
Predeformation for 2nd Order Analysis - DIN EN 1993
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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.Sc.
Predeformation for 2nd Order Analysis - DIN EN 1993
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
De
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Fra
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Knicklinie
DIN 18800-2 DIN 1993-1-1 DIN 1993-1-1/NA
w0 e0,d / L e0 / L
a0 l / 350 1 / 350 1 / 900
a l / 300 1 / 300 1 / 550
b l / 250 1 / 250 1 / 350
c l / 200 1 / 200 1 / 250
d l / 150 1 / 150 1 / 150
Predeformation for elastic calculation – according to different codes
DIN 18800 vs. DIN EN 1993-1-1 vs. DIN EN 1993-1-1/NA
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Civil & Structural Engineering
Bauhaus-Universität Weimar Modeling of Structures and Numerical Simulation - 2014
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Centered loaded buckling beam: