Large Scale Use of Sensors and Stay Cables: The Abraham Lincoln Bridge
The Abraham Lincoln Bridge is part of the large infrastructure project “Ohio River Bridges Downtown Crossing” in Louisville, Kentucky, USA. The bridge that was originally named Louisville Downtown Crossing accommodates northbound traffic of the Interstate I-65 and connects the center of Louisville in Kentucky with Jeffersonville in Indiana. In the meantime, the structure has been named after Abraham Lincoln, the 16th president of the USA, who was born in Kentucky in the 19th century and grew up in Indiana.
The Abraham Lincoln Bridge runs parallel to the John F. Kennedy Memorial Bridge, which was opened to traffic in 1963, and will accommodate all northbound I-65 traffic once the project has been completed. The John F. Kennedy Memorial Bridge will then carry southbound traffic.
The new bridge was built as a stay cable bridge with three pairs of pylons. The stay cables hold the six lane composite steel/ concrete deck in place. The bridge has a total length of approximately 642m (2,106ft) and consists of two 228.6m (750ft) long main spans and two 92.35m (303ft) long side spans.
For this project, DSI produced and supplied the DYNA Grip® Stay Cable System as well as the DYNA Force® Measuring System including equipment. Furthermore, DSI provided technical assistance and on-site supervision. Before installation started, DSI performed two successful full-size tests with Type DG-P37 and DG-P109 DYNA Grip® Stay Cables. In total, 176 DYNA Grip® Stay Cables including anchorages and 597t of strand were needed:
40 Type DG-P37 Stay Cables
56 Type DG-P48 Stay Cables
32 Type DG-P55 Stay Cables
8 Type DG-P73 Stay Cables
8 Type DG-P91 Stay Cables
32 Type DG-P109 Stay Cables
DSI also supplied 88 internal hydraulic dampers. The DYNA Grip® Stay Cables were successfully installed by the General Contractor, assisted by DSI technicians and engineers, from November 2014 to November 2015.
DSI was awarded the contract to supply the DYNA Force® Measuring System including a remote controlled readout unit for the longterm monitoring of the forces acting on the stay cables. With a total of 264 DYNA® Force® Sensors for Type 0.62" Strand and 3 readout units equipped with a remote system supplied, the Abraham Lincoln Bridge is the largest application of DYNA Force® Sensors for DSI in Post-Tensioning so far.
The first lanes were opened to traffic approximately 4 months earlier than planned at the beginning of December 2015. The complete Downtown Crossing Project including the rehabilitation of the Kennedy Bridge and the connecting roads on both sides of the Ohio River is expected to be completed by the end of 2016.