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[Civil] How Do I Define the Start of a Bridge Span When Designing Travel Lanes?

Question

How do I define the start of a bridge span when designing travel lanes?

 

Answer

We can specify the span start of the bridge in Load > Load Type > Moving Load > Traffic Line Lanes/Traffic Surface Lanes

In multi-span bridges, we will select the first element of each span as span start. This is used to calculate the maximum negative moment of a continuous bridge due to DL.

Considering an example of 2 span bridge. We will select the element number 1 and 8 as span start as shown in the images below.

 

 

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