I-95 New Haven Crossing Corridor Improvements

This project involved building 3-D finite element models for multi-modal analysis of multi-span bridges, nonlinear push-over analysis, and plastic hinge detailing. The viaduct consists of eleven proposed bridges, and a temporary crossover bridge that is used during staged construction of the viaduct. The substructures include multi-column reinforced concrete bents and straddle bents supported on precast pile foundations, and multi-column bents on drilled shafts. Certain span lengths of the cap beams are up to 40 meters between columns.

The seismic results were used to design the cross-frames of the curved superstructure, bearings, piers, and the foundations. The foundations were designed using the seismic forces and soil structure-interaction stiffness calculated from a non-linear finite element program. The seismic models were also modified to determine the thermal movements. The FEM computer codes that the firm uses for such work are GT Strudl, STAAD, and LARSA 2000 (shown lower right). Additionally, a flood plain analysis for the proposed new Q-Bridge (shown above) structure was performed using the program HEC-RAS (rendering shown lower left). In conjunction with this effort, GM2 was responsible for the demolition sequence of the entire existing structure and the design of two single-span bridges over Fulton Terrace. Both bridges utilize steel plate girders and are part of contract B of the corridor improvements.

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