123456789_123456789_1123456789Cable-stayed Bridge Software 

Analysis Model
ICDAS CSB 2021.00R

Geometry Model 
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Cable-stayed Bridge
Model Examples



Model description



Input



BIM model



Analysis model



Landscape model



ICDAS Basis of Design



Software



Additional features



Rendering, Animation &
Vitural Reality   


Case Study and 
Research




 









 










 

Increasing stiffness of the deck box


The deck box stiffness is increased by its depth and the longitudinal plates. It will increase both bending

and torsional stiffness of the deck box girder.


To separate the bending and torsional natural frequencies of the bridge, only the torsional stiffness is wished

to be increased. It can be obtained by increasing e.g. thicknesses of the cross plates. More details are found in 

Case Study.

 

Shown below is the deck cross section, which is increased to 4m depth in Revit and Lusas, by changing the input
of the 
bottom lines of deck. 


Alternative Text


Figure: Deck depth increased from 3 to 4m, Revit family file.


Alternative Text

Figure: Deck depth increased from 3 to 4m. Add additional longitudinal plates, Lusas models

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Shell elements


Shown below are the shell elements and thicknesses assigned to the longitudinal and the cross plates of the deck

(here only two longitudinal plates were created on each side of the cross section except at the pylon). With shell

elements one can get detailed results on each plates of the deck.


                    


FigureAdditional plates at the pylon 


To obtain also detailed results for the pylons it is tested to model in shell elements too (not default in
CSB 2014.06R). However, with respect to nonlinear analysis convergence it is recommended that the
pylon is modelled using 
3D Thick nonlinear beam BTS3 element.

 

FigurePylons in shell elements


See Case Study and Research

 


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Updated 02-02-2018


 

123456789_123456789_1123456789ICDAS  •  Hans Erik Nielsens Vej 3  •  DK-3650 Ølstykke  •   E-mail: th@icdas.dk   •  Tel.: +45 60 53 83 79  •  CVR no.: 34436169 
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