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. Can you tell me what the allowable deflection of a suspension bridge is? And what standard is this deflection limit based on? 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…

Can someone please define/review my understanding of the following Deflection loads shown in the beam results report? Initial Load = dead and live construction loads + deck and beam self weights Live Load = live load Post Comp Load = super imposed…

Why is the live load deflection shown in the Camber and Deflection tables so much different than the live load deflection values in the analysis tab? Which one is the actual service level deflection?

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

I am designing a hammerhead pier using the substructure module in LEAP Bridge Concrete. The geometry is a little odd...it's a hammerhead cap on a circular column. To compare the results for the cap design from the conventional sectional design & strut…

I'm doing a rating of a Girder-Floorbeam-Stringer bridge in LARS (LFR). I hardcoded the input files to automatically create check points at section changes '[SectionChangeGenerateCheckPoints] 1', and that appears to work fine except for with the floor…

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…

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…

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…

Hello all, I just searched through the forums and the wiki and couldn't find an answer to this question. I'm using LARS Bridge V8i (SELECT Series 3) - Version 6.00.01.08 In the "Description" drop down menu --> General Member Information There…

I am using the Substructure module of LEAP Bridge Concrete. According to AASHTO LRFD, you can't have a truck on both the approach slab and on the deck, but you can have a lane load on both. When generating live loads for an abutment, there are two…

Does anyone have calculation verification for the live load auto-generation function in RC-PIER? Or has anyone else had problems verifying the LL output from RC-PIER?

Hi, Dear All, If I calculate live load caused bearing reaction directly as input for RC-Pier, I should consider multiple presence factor and should not consider impact factor in these reaction forces. Am I right? Please let me know. Thanks. …

Dear All, I was checking the design truck I added for auto-generation. I clicked "view" button and it shows as follows. The numbers look right, however the unit is in metric unit. I checked my units setting and it is "US units". Then I went…

Following is for student project in Bridge Engineering class: We have modeled a two-span continuous bridge in STAAD. We intend to assign Wind loads, based on AASHTO 2012 values. How can a wind definition be created to assign a wind load? Our wind…

Recently I am working on a transition bent which is a multi-column bent. The approaching span is simple span, and the main span is continuous-three-span. I am considering using the 3rd option for live load auto generation since the first two options …