Hi all. How is non-linear material analysis n RM Bridge understood? Best regards.

Hi all. How does RM Bridge consider the effect of cable sag? Best regards.

Hi all. In the design of a cable-stayed bridge, what is the allowable displacement of the A and H shaped towers under live load? Best regards.

Hi all. In composite steel girder bridges with concrete decks (continuous span bridges), does RM bridge automatically Calculator effective width of deck to calculate short-term and long-term composite cross-sections? best regards.

Hi all. I hava some question about steel composite brige as follows: 1. To calculator stress point of section, Rm Bridge automatic use short-term section for live load and load case type Non-permanent and use long-term section for load case type Permanent…

Hi all. In continuous beam structures, the allowable downward deflection of the bridge under HL93 load is L/800. So may I ask what is the upward deflection of the continuous bridge structure under HL93 load? best regards.

Hi all. in steel girder bridges combined with concrete decks (continuous span girder bridges). If the concrete deck is not in tension and the combination of internal forces according to the Service limit state is service.sup, then use the ReloadSup function…

I am designing a prestressed slab-beam bridge and the design output shows Mr/Mu ratio of 1.06, but the value is shown in red with asterisk next to it indicating the design is not acceptable (see screenshot below). I have not been able to figure out why…

Hi I am looking to design a square column on a drilled shaft/Caisson however the square column size is larger than the caisson and would like to introduce a circular longitudinal reinforcement pattern in the column, so it sits well into the drilled…

Hi, I am designing a multi column pier on spread footing in LEAP 20.00.00.58. I noticed that the option in A/D parameters of designing footing per AASHTO 10.6.1.3 disappears once multiple columns are specified in the model. Is this a bug, since 10…

Hi all. Nice to meet you. I have a model steel composite cable-stayed bridge with 6 span continuos by Rm Bridge V8, 2 side span have 150m, 4 main span is 300m. I don't known about allowed deflection of the bridge. I use AASHTO LRFD standard. If you…

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…

When using RCPIER and the strut-and-tie model for hammer head piers my strut-and-tie model deletes after I exit RCPIER to the main LEAP Bridge Concrete screen even after saving and generating reports. How can I preserve my model upon exiting RCPIER? …

Can LARS Bridge load rate ACROW Truss?

Hello, I was wondering if there is a way to design a post-tensioned integral pier cap for a steel I-girder bridge in Leap Bridge Concrete or any other LEAP software? Thank you for your help, Olya

Hello, I am new to Leap Bridge Steel and have a few questions: 1) What method is used to determine the deflections of girders for the HL-93(Deflections per AASHTO)? I am comparing the deflections for 2 girders with the same properties and the same…

I am looking for the difference between Load Case "HL-93" vs Load Case "HL-93 (Deflection per AASHTO)". When running the reports, I see two parameters: HL-93, and HL-93 (Deflection per AASHTO). What is the program doing differently to these two cases…

Hellow, I need to use AASHTO LRFD Bridge Design Specs - 7th edition with 2015 & 2016 interim revisions for my project. I have following options and want to know the version which is appropriate for the project. 15.01.00.05 16.01.00.10 16.02…

Hello, I was wondering what edition of AASHTO is LEAP Bridge Concrete v16.00.00.24 using? I was unable to find it in the software itself so if it's possible to describe to me how I can find this within the program as well I would appreciate it. Thanks…

June 24, 2017 Dear Engineers, Greetings for all structural engineers in the world. I'm a bridge engineer from the Philippines and currently connected in a consulting firm. I'm using Leap Bridge Concrete for less than a month and find out that it…

I am using the LEAP Bridge Substructure module to design a pier for a continuous 4 span structure using HS20 LFD loads. In the AASHTO Standard Specifications, it gives you a few options for the loading. One is that you can use a lane load with one concentrated…

I have created a Leap Bridge Enterprise file consisting of a 3 span precast girder Conspan Model, and single column bents with bent caps created in RC-Pier. I'm trying to generate WS loads from the Auto Generate feature. I assume the Wind Pressure for…

One of the new features added to the latest RC-PIER is the comprehensive auto-generation of WS loads and load combinations per the FDOT SDG 2013: An option for WS load auto-generation is now offered under the “Loads” tab. FDOT strength and service…

When manually inputting live loads into RC-Pier, how do you specify a lane load. According to the help.... "For manually input live loads in AASHTO LRFD, this screen behaves slightly different. When a live load case is added in LRFD mode and edited, the…