How does LEAP Conspan apply multiple presence factors if live load distribution factors are entered manually? If distribution factors are entered manually, is it up to the user to apply the multiple presence factor to the manually inputted distribution…

Hi, all I have generated the model for 2-span, continuous span model. The negative moment reinforced rebar is supposed to be taken care of the negative moment. I have input the negative rebar but it seems in the strand pattern check, the program assumed…

When opening from OBD Connect Edition, I accidentally double clicked on the Leap Bridge Concrete button, and it tried to open up 2 instances of the file. It generated an error, I don't remember which one, and now it won't open my file. I'm afraid I lost…

PDF When designing the end bent of a bridge unit (continuous unit), how do you get leap concrete to read the live load cases from the previous unit? The program only models one bearing line and doesn't seem to have an option for import of the loads…

Hi, I am trying to design prestressed concrete 78" Girder with 8.25" Slab thick. my Prestressing steel centroid is Ypg=9.88 in and total section height H=86.25" so my dp=H- ypg=86.25-9.88=76.37". I have no mild reinforcement in the girder, so dp=de…

I am creating a custom I Beam section but the input fields are constantly being locked, preventing me from updating the dimensions. Restarting the application and going straight to the Beam Section Library sometimes, but not always let me update the dimensions…

Hello, I am designing the shear reinforcement in a straight pier cap for a multi-column pier. The issue I am having is that whenever I increase the number of legs for my stirrups, the area of steel required also increases to the point where increasing…

Hello, I have a problem in the beam section analysis. I assigned rebars to the beam but the program says I have "0 Ast_prvd" at the transfer location and I want to know if there is any way to fix this or if there is a special setting I should look for…

Hi, I have a bridge structure that instead of having abutments as the end supports it has piers instead. These end piers support other connecting structures that have abutments (this portion is not modeled in the file). I'm able to change these abutments…

Hi. Under the Analysis Tab when I go to Pile 11 for Load Combination 2 I see a maximum Fy of 395 kips, but when I look at the Pile Reactions Tab Pile 11 has a Pile Reactions of 270 kips. Why are these not the same or at least very similar? Pile 10 also…

I have this error while trying to send my OBM to Leap Concrete. Anyone can Help?

When exporting to LEAP Concrete from OBM using the Open Bridge Designer application, this occurs for me: The bridge is flat with no curvature, just a 45* skew. The bearing elevations for the one girder line shoot up drastically into the air…

We are designing a simple two span precast bridge. The pile caps will be cast in place concrete and the deck units will be precast concrete deck units (mostly 5' x 20' units) with a composite topping pour. I can not figure out how to get such a simple…

Hi, There are cases where centrifugal forces produce a moment that actually counteracts the critical moment in the column, does RCPier consider effects due to vehicle cases without centrifugal forces as provisioned in AASHTO Spec (See below excerpt…

Is it possible to define a bridge with non-parallel abutments where every prestressed beam length is different? I have created a file with supports that have different skew angles, and the rendering looks correct, but when I do the analysis all the…

Is it possible to change the default location where OpenBridge Designer stores its working files for LEAP Bridge Concrete and LEAP Bridge Steel? Currently the program creates a temporary folder on the users hard drive and stores the *.lbcx files there…

Dear All, I am trying to perform QAQC for a substructure-only model and have a couple questions. (LEAP Bridge Concrete stand-alone program) Checking Live Load Generation: Where can I find the output for the live load distribution factors that were…

Hello, I am working in LEAP Bridge V20 using LRFD 8 to design a pier. The wind loads that were auto-generated for the structure do not match my method of verification. I have been able to match the pressures for each of the load combinations (Strength…

I am having to change some geometry and beams deck, spacing Pedal stools and so on. I had already exported from OBM to Leap but need to update that Leap model to reflect the new changes done in the geometry. How do I Update that Leap File without having…

I am working on the Bentley tutorials but I am confuse on how all of the Open Bridge Desiner connects to Open Bridge Modeler and Leap. do we need to start from OpenBridgeDesigner to have the Modeler and Leap work together. When I create in OpenBridge…

Hi there, How can I increase the font size of the preview. I am modeling a PSC bridge using OBD 10.09.00.10.. and pushing the 3D model to the integrated Leap Concrete to analyze and design the bridge components. see picture attached for the issue…

I have two issues when designing a combined footing. - Issue 1 has been reported by someone here previously and was never resolved or updated. It is about reinforcing of the combined footing not "developing" or being found at the edges of the footing…

in Leap Concrete, I want to reinforce the void girder similar to the attached drawing, after I added the tendons and the reinforcement rebars (manually) the provided ultimate moment did not differ when the tendons alone and after adding the reinforcement…

How does leap concrete bridge calculate the deflection due to live load on prestressed concrete girders below cast in place slab. I tried all types of presence factors, aashto... etc . Could reach to similar results

Hi everyone, Is it possible to do a load evaluation for negative moment? It seems like when you run a load evaluation for moment, the default “Type” is always positive (see photos below). I'm trying to find the live load capacity factor for girders…