Concrete beam splices, although less common, are significant when dealing with precast concrete. Due to their complexity, several design challenges exist, such as load transfer between steel and concrete parts and proper reinforcement design.
By utilizing connection application, the approach to modeling this type of connection is to focus on one side of the joint where we have to consider the precast beam to be represented by a concrete block. The other side of the precast will be represented with a steel beam just for the sole purpose of applying the loads (as it is not possible to apply loads into a concrete block in connection application in the current version).
As the joint connection is symmetrical, the distribution of the internal forces as well as the stresses to the plates would be the same on the opposite side represented by the steel beam, which can also be reviewed by switching to analyze the concrete block on the other side.
For a complete assessment, we recommend evaluating the anchors in IDEA StatiCa Connection and then the concrete block, including reinforcement, in IDEA StatiCa Detail.