Document Type: FAQ
Product(s): LEAP CONBOX/CIP RC/PT Girder
Version(s): All
Original Author: Bentley Leap Bridge Technical Support Group – VM
ANSWER:
1) A 2 span Box girder bridge was created in Leap Conbox. In the Load/Analysis TAB I deleted all the trucks and kept only Design Truck and Design Lane.
2) Ran the analysis and clicked on View Analysis Button.
3) In the Analysis Results window I selected these options Final --> Truck/Lane --> Design Truck --> Min/Max Reaction.
4) For Abutment at Location 0.00 ft I noted down the Max Vertical Reaction as 58.01 kips.
5) I followed the same procedure and for Design Lane I noted down the Max Vertical Reaction as 16.53 kips.
6) In the Analysis Results window I selected these options Final --> Truck/Lane --> Design Truck --> Min/Max Forces.
7) After scrolling down halfway the user can see the Distribution Factors and Impact Factors for Service I, III and Strength I limit states at different POI.
8) Then in the Analysis Results window I selected Final --> Live Load --> HL 93-Multi Span --> Min/Max Reaction option.
9) For Abutment at Location 0.00 ft I noted down the Total Max Vertical Reaction as 506.74 kips.
10) Please follow the following procedure to calculate the Final vertical Reaction.
11) Design Truck + Design Lane = (58.01 x 5.41 x 1.33 ) + ( 16.53 x 5.41 x 1 ) = 417.4 + 89.43
12) Total Vertical Reaction = 506.8 kips
Please see the attached screen shot for more information.