MACARTHUR INTERCHANGE US-90 BUSINESS PHASE I

Full evaluation of the completed bridge widening was carried out under a task for peer review, where several constructability and detailing issues were discovered. SDR performed a full 3-D finite element analysis of the existing bridge, including the inverted-T piers, as well as a bridge load test. After further evaluation it was determined that the widening plans were deficient and re-design was required. SDR was tasked with the design and production of final plans of all superstructure elements, including the prestressed U girders and LG girders, deck, inverted-T caps and columns, and all complex columns with unbalanced loads. In addition, due to the structural complexity of the existing inverted-T piers, SDR performed a special analysis to evaluate and determine the cut lines for accommodating the widening. The evaluation of existing cut lines was performed and new alignment was developed.