Variable Longitudinal Stiffeners
LBS inside OpenBridge Designer , allows users to easily create models with longitudinal stiffeners within a girder element with a variable height. After the usual geometry and modeling steps for creating the main girders in the Member Definition tab,…
How to adjust the Precast girder length from one abutment to the other?
In LEAP Bridge Concrete , for a flared bridge model with only one single span, the user has to follow some steps to adjust the Precast length :
1. Open the model and go to the Superstructure tab, select the Precast/Prestressed Girder button to open…
Precast girders geometrical elevation measurements
For bridge precast girders there are some elevation measurements that are an specific geometrical issue to achieve the final roadway profile while accommodating the girder camber and geometric effects of the roadway surface including super elevations…
Discontinuous Girders, Substringers, and Girder-Floorbeam Systems
There does not appear to be a way to model a built-up plate girder diaphragm in OpenBridge (I have to place diaphragms between adjacent girders - I cannot skip a girder, and I cannot model a built-up section), or to model a substringer system. I see notes…
RM Bridge \ Modeler \ Cross-sections: Parts
At Modeler inside RM Bridge in the Cross-Sections , users can define Parts that are used to define the Beams and Nodes for the structural system to be used in the analysis and calculations. Although most models will have only one Part 1 that is pre-defined…
RM Bridge: Modeler axis FAQ: Complex transversal supports or girders
RM Bridge allows users to model any complex transversal supports or diaphragm thru the use of several Modeler axes. As usual, each Axis will create the necessary elements to compose the grillage; though, the user can easily make it more versatile using…
Modeler Axes
In RM Bridge at the Modeler component the Axie elements usually represent the Axis of a road alignment; but, in more geometrically complex models, an Axis could also be the transversal support lines or any other local reference axis that is needed. One…
Haunches are overlapping when modeled on a custom girder
Hi, I created a custom beam with three templates show the solid and the void part of a super-t girder, when i tried to put a haunch on it, the modeled haunch is not extending up to the edge of the girder and it overlaps in the middle, see snap below:…
How do you access variables in beam templates?
I need to vary the width of the top flange of a Super-T girder (Australian) to follow the curved edge of a bridge deck. I can add variables to the points on the beam template but can't see how to access them/set them when the beam is used in a beam group…
Reinf crack for prestressed concrete
Hi all.
I have a question about Reinf crack for prestressed concrete as follows:
If you calculator stress bot of section beam in MinMz_Service exceeding allowable stress tension limit is 0,5 x sqrt(f'c), you can calculator reinf area to control crack…
Girder Reinforcement Rebars in Leap Concrete
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…
LBC Mild Reinforcement Floating above structure
Hello,
The bridge is curve prestressed with box beams and the mild reinforcement within the beams is floating above the bridge deck. Currently the issue just seems to be graphical. The model was intailly generated with the ABC modeler in version 18…
LEAP Bridge - Precast/Prestressed Girder - 10th points
Hello,
Camber and deflections are reported at 10th points along the beam. I am modelling a longer span which will require more than 10 screed points. Is there a way to toggle the number of points? Or do I have to interpolate?
Thanks,
Girder length issue in Bridge Parametric Layout
I am using Leap Bridge Concrete CONNECT Edition v17.01.01.07. I used ABC wizard to model a two span non continuous bridge (110'-104') with a 17.5 degree skew. The deck in span 1 is 66.6 ft while in span 2, it flares from 66.6ft in the interior bent to…
Open Bridge Modeler and LEAP Bridge Concrete
Hello,
I am getting the following error while trying to transfer the OpenBridge Modeler model over to LEAP Bridge Concrete to complete the girder design.
Error: LEAP Bridge Concrete application could not be found in path.
Currently running LEAP…
Skew Girder Ends
How do I modify the beam template to have skewed ends as detailed by TxDOT for skewed bridges? Currently, the beam ends interfere with the abutment backwalls. ftp.dot.state.tx.us/.../igebsts1.pdf
We do not want to put the beams on a skew but rathre…
Is my thru-girder modeled correctly in LARS? How does LARS determine moment capacity of unbraced members?
I've modeled my two simple-span girder-floorbeam-stringer bridge in two separate models, and my thru-girders in my Span 2 model are coming out with a much lower capacity than expected. They are coming out with rating factors around 0.1-0.4 for H15, HS20…
How do you model girder Live Load as point loads in ThruGirder-Floorbeam-Stringer system in LARS?
I am load rating (LFD) a ThruGirder-Floorbeam-Stringer bridge with open-grid steel deck. The deck is welded to the floorbeams and stringers only. There is no connection of the deck to the girders. The only load path for live load to get to the Thru-Girders…
CONSPAN - Precast Girders at Interior Supports
I am using CONSPAN in my design and have a couple of questions about the method in which the program performs calculations. Does CONSPAN design prestressed girders, at the interior supports, as reinforced concrete beams? According to AASHTO, LRFD 5.14…
CFD RM Bridge
Dear All,
I am using RM Bridge for CFD to compare values with wind tunnel test. I am able to do cfd for predefined deck section but when I make my own deck section, In Analyzer --> Aero classes when i try to do the CFD error message displays ""Cross…
fatigue analysis in RM Bridge advance
i want o analysis the one rectangular RCC beam for cyclic loading, please help me to model the structure in RM Bridge advance and know the nos. of cyclic for particular stress range or vice versa. I attached the diagram for refrece
Detensioning Failure
I have a single span bridge using I-girders that I need close to the max amount of strands in. These are all straight strands, and I've had to debond to 4 different lengths from the end. The longest debond is 25' of my ~90' girder. When I look at the…