Looking at your pics the I beams look good . Did you have an engineer spec them out? Also the footer for the vertical support beams. Is there a caisson underneath? I would be leery of the weight being forced down onto the concrete where the vertical beam rests. All the weight of the floor above is concentrated on the vertical I beams foot print on the concrete. If the thickness of the concrete is insufficient the weight will cause the concrete to give way or crack and sink. I helped a friend do the same thing only not as drastic as yours . His span was 26' and the I beams he used were side by side and the same web and thickness. He did have some settling upstairs , doors sticking and drywall cracking. Maybe if you installed a bigger plate under the I beams to spread out the load.
Jim.