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In order to achieve radial alignment, as shown in the figure below, the user needs to input non-zero bearing rotation values. Although inputting a non-zero value will not change the global behavior if the bearing is fixed (or has the same stiffness) in the x-y direction, the spring forces reported in the local axis will be different. Therefore, it is crucial to input rotation values accurately.
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Transfer Forces to Substructure[Yes/No]: If the user chooses to connect to the substructure, a two-node spring is generated between the pier cap and the girder. On the other hand, if the transfer to the substructure is selected as no, a single node spring with specified fixities is generated instead. In general, selecting "no" for transferring forces to the substructure and using a single-node spring aids the user in comprehending the behavior and designing the superstructure without modeling the substructure.
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