Moving loads on network arch bridge

[Anonymous]

Hi!

I'm doing an analysis of a network arch bridge, and want to implement moving loads in my analysis. In this stage the analysis is carried out in 2D.

I've got results for the moving loads, and the influence lines for the bridge. So my question is: Is it possible to get the results for Fx, and My for only the bridge arch? Or does the influence lines presented in Robot only give values for the whole bridge.

RTD-file and screenshot is attached

[Rafacascudo]

Select the bars where you want results and on View/Display ,select it to "display attributes only for selected objects"

Also , you can open the selected bars in another window if you want to show only the arc bars or girder bars

[CivilYoke]

Sorry to dredge up an old thread but is it possible to get the influence line report for a bridge with different sections? i.e. A Varied deck box girder bridge?

Kindly find attached my model as I would love to generate the influence line results for the entire bridge for a calculation report.

@Rafacascudo 

[Rafacascudo]

It doesn´t matter what kind of bar you have on your model . Just select the the moving load and goto Results/advanced/Influence line... and,,,

If you want the "classic"  influence line by  an Unitary moving load ,then you have to create a new moving load case with a new unitary vehicle

[CivilYoke]

Thank you so much for taking the time engineer. I was looking for a way to show in the calculation notes that the influence line analysis for the bridge had been performed, but as you can see, the deck is a combination of various members. My question is "How can I show this in the calculation report to be submitted to the checking engineer?
if the bridge was made up of just one bar, the influence line results would be easy but since it doesn't, do I have to select every single section bar that gives a critical value (i.e. shear, moments etc)?
Thank you in advance.

[Rafacascudo]

    If this bridge was made by just one bar , you would have the same work to extract influence lines for each position along this bar. I do not see the meaning of checking the influence lines for this type of bridge as they are just continuous well behaved and apparently symetric spans . One useful information to extract from the influence lines would be where to load the live moving load around the vehicle, but even for this ,it is pretty obvious and simple to know where to put the live load to obtain max/min inernal forces/reactions/displacements.

   What the checking engineer probably wants, regarding moving loads ,are the envelope diagrams for each meaningful internal forces , reactions and displacements ,like the one below

[CivilYoke]

I agree! Thank you very much Engineer! you've been very helpful.