Question
In the road bridge design criteria, section '2.1.3 Live Load, (2) Live Load for Designing Residential Slabs' states the following
How do I find additional concentrated load locations in a continuous beam moving load analysis?
Answer-1
You can consider additional concentrated loads using the Span Start input in the [Load] Tab > [Moving Load Analysis Data] > [Traffic Line Lanes] function.
In the Traffic Line Lanes feature, the bottom table, Span Start, selects the element that starts at each span to differentiate the spans of a multi-span bridge.
Specifying Span Start ensures that additional concentrated loads are properly accounted for in the calculation of interior point negative moments for continuous bridges.
Answer-2
You can also consider additional concentrated loads by using the [Load] Tab > [Moving Load Analysis Data] > [Lane Support – Negative Moment at Interior Piers] function.
When calculating the maximum negative moment due to lane loads on continuous bridges, the program automatically calculates and considers the equal concentrated loads at the most unfavorable locations within the two spans adjacent to the specified support point, in addition to the evenly distributed lane loads on both sides of the support point.