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  • Leap bridge concrete Flexure check

    Hi If we define bar length, is leap bridge software have capability to deduct development length based on dia of bar and calculate flexure check at that point.

  • Circular Column Interaction Diagram

    Hello. I'm wondering how LEAP Version 21.01.00.22 calculates the maximum axial load displayed in the diagram. The diagram displays a maximum axial force allowed of 1802 kips. As expected the 1802 kips doesn't change regardless of the load combination…

  • LEAP Concrete Pier Design - Effective Footing Dimensions Considered (A/D Parameter)

    There is an A/D Parameter, under the "Footing" tab to consider effective footing dimensions in analysis of a spread footing. This appears to calculate the effective footing assuming the footing is bearing on soil (as opposed to rock). Is there a way to…

  • RCPier - Response Modification

    I am using Leap Concrete Version 18.02.02.03 for a multi column pier design that includes seismic forces. I need to apply a response modification factor for the columns and the help guide states that this can be modified in the Seismic Parameters. However…

  • Leap Bridge Concrete Wall Pier - Moments at bottom of wall

    I am using Leap Bridge Concrete to design a skewed wall pier. After analyzing the pier, I noticed that for the braking force, that the sum of the forces in the z-direction at the top of the wall did not equal the sum of the forces in the z-direction at…

  • RC Pier EH loads on pier

    I am designing a pier with a spread footing with unbalanced soil loads on the footing with a large crash strut that will be cast directly on the spread foundation that will be running the length of the foundation. This crash strut performs double duty…

  • RC Pier (LEAP SubStructure) Live Load Auto Generation Reactions

    How does RC Pier (LEAP SubStructure) account for skew when calculating the bearing reactions for the Auto Generated Live Loads. I can replicate the reactions when there is no skew, but I have issues when skew is applied. Any assistance on the matter would…

  • LEAP Bridge Substructure/RC-Pier LFD Live Loads in the Negative Moment Region

    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…

  • Live Load Surcharge

    How exactly should the vertical component of LL surcharge on the footing be input? I have a 100 ft long footing (x dir) with a 9.75 ft heel (z dir). Per AASHTO, I'm using the equivalent of 2 ft of soil for the surcharge. There's 80 ft of clear roadway…

  • RC-PIER Live Load Auto-generation verification

    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?

  • Rigid link in RC-PIER

    A new feature of using rigid links in the structure model in RC-PIER has been added in LEAP Bridge Enterprise v14 per the request from Michigan DOT. Below are some basic facts about the new feature. A rigid link, simply put, is one which does not…

  • Out-of-plane reactions distributed to pier columns for AASHTO LRFD with California option in Substructure

    A feature has been added in RC-PIER per the request from Caltrans. This feature is about how the out-of-plane reactions to external loads from superstructure are distributed to pier columns in an integral pier. For those loads which have both vertical…

  • Wind Load Auto Generation

    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…

  • Auto-generation of wind load on structure (WS) per FDOT Structures Design Guidelines (SDG) 2013

    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…

  • Integral Abutment Feature in LEAP Bridge Enterprise

    Primary benefit of integral abutments is to offer joint-less bridges to improve the durability of the structure. The most common integral abutment type is the pile bent abutment. The connectivity with the abutments causes the structure to move as a whole…

  • Frame Analysis Method for pile cap abutment and pile bent in RC-PIER

    In general Frame Analysis method, cap is modeled as a beam and piles/stem walls are modeled as columns. In the “Cap as continuous beam” option, the cap is analyzed as a continuous beam. To mimic the continuous beam” analysis for the cap, the axial stiffness…

  • Walls in RC Pier

    I am designing a two stage pier wall. There is no option for just a wall in RC pier. Is there a way to trick the program, I have tried a couple of different options but none have worked. The top wall is tapered in both directions and the bottom wall does…

  • Re: RC-Pier Load Input

    This feature has already been added in RC-PIER and will be in v09.00.00.xx scheduled for release in May 2009. Users will be able to specify a text file from which the values can be read in from. This feature will be available for both LFD and LRFD, and…

  • RC Pier Column Design

    I cannot match the values that RC Pier generates for the column's moment magnification calculation for the Bd value (Ratio of Perm. Moment/Total Moment from AASHTO LRFD eqn 5.7.4.3-2). I have tried the minimum eccentricity from the AASHTO LFD code. I…
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