I just start to build the model for a steel bridge in Abaqus. The bottom and top flange have variable thicknesses while the web thickness is constant all along the girder. I tried to create the parts with solid and shell shapes but still, the job can not run properly.

Is there anyone who succeeded to build a steel girder bridge model?

What do you recommend: create different parts (top and bottom flanges and web) separately and then connect them or create I shaped parts and attribute thickness to each part connect them using tie constraint?

Here is an example of thicknesses variation in one girder.

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