Assign special connection for STAAD PRO CONNECT EDITION

Can anyone assist with the following problem (STAAD PRO CONNECT ED. V22)

I have to design a bridge with this kind of connection (beam elements do not collide). This consideration cause that in the STAAD model will exist a gap between bridge and columns. How can I make a single connected model (with all the structure in a unified model, without the need to introduce loads manually from the results of the bridge). I want to simulate that connection without creating a weak element in the gap or creating an element but not to be considered in the design.

Thanks