I’m rating a 4-span steel plate girder bridge (1978) with phased deck replacement in 2025, and I need influence lines that reflect time-dependent stiffness and partial composite action. Between LARSA 4D and MIDAS Civil, which has given you more trustworthy LLDFs and construction-stage stresses under AASHTO LRFD 9th when calibrated to a 2023 laser scan and UT thickness survey showing 18% section loss in one exterior girder?