How To model curved box girder on sap 2000 or lusas or midas?

[guanzzz]

if you know the modelling step by step pls upload.thx

[rusty]

Dear guanzzz,

Can you give us more details? Do you want to run construction stage analysis and/or handle time-dependent material properties? etc..
In MIDAS Civil you can easily create curved box girder bridge (I’m using the 2010 version, I don’t know that the earlier versions contains this feature or not)
Model>Elements>Create Line Elements on Curve

Available curve types:

Arc by 3 points
Define an arc by assigning 3 particular points
Arc by Center and 2 points
Define an arc by assigning 2 particular points and the center of the arc
Circle by 3 points
Define a circle by assigning 3 particular points
Circle by Center and 2 points
Define a circle by assigning 2 particular points and the center of the circle
Ellipse by Center and 2 points
Define an ellipse by assigning 2 particular points and the center of the ellipse
Parabolic Curve by 3 points
Define a parabolic curve by assigning 3 particular points
Cubic Curve by 4 points
Define a cubic curve by assigning 4 particular points

If these are not enough, you can approximate the arch with straight lines.

You can handle the time-dependent material properties such as creep, shrinkage, compression strength, and construction stages as well. The software offers design features as well. If you can be more specific, maybe I can help more.

here you can find more information about the capabilities of Midas
official website
Midas Civil description
Midas Civil catalog

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Best regards,

rusty

[guanzzz]

sorry
but i use midas civil 6.3.0
it didn't have template for that at all
i'm confused

I want to make horizontal curved steel box girder bridge with 60 m length the box girder shape is trapezoidal n the deck material is concrete so the bridge is composite too

the problem is how to model it be curved n about how to define the section of steel box in midas n about the composite deck n etc 'cause when i download it, the software didn't have manual at all ( the manual didn't include at all ) { not like sap or staad with the manual included in the software when it installed } ,
n i search online n found no more about the manual yet
so that become a big problem n sap not compatible for curved steel box girder also staad is the same case

best regards

Guan

[essenza]

It is better to read Bridge Deck Behavior by Hambly to undestand modeling of curve box girder.

[rusty]

Dear Guan,

First of all, MIDAS softwares are using On-line Manuals (automatically updated, you do not have to download large help files), nevertheless you can download the manual from the official website, by the way if you don’t want to create an account use this link to download the latest version:

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With midas Civil you can easily create a typical steel box composite section, but if you would like a general type use the SPC tool (Section Property Calculator) of midas.
In case your midas civil don't have this feature, you can download the midas civil 2010 evaluation version (30 days) from the official website:

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(you must be a registered member - free) and you can discover the features and capabilities of the software.

I agree with essenza, first try to understand what differences will result the curved beam, start with basic static considerations.

Best regards,
rusty