Luis Antonio Lopez Danielle Marzitelli Phillip Portalatin Madison Zehring
Shinae Jang, George Gerard, Thomas Laliberte, Masoud Mehrraoufi (WSP USA)
Superstructure Replacement of Bridge No. 00037 over I-95 in Stamford, CT
Bridge No. 00037 is located in Stamford, CT carrying Route 1 over I-95. The existing bridge is built in 1958, a two-span steel plate girder structure with 242 ft in length and 76 ft-2 in in width. The bridge is comprised of two lanes in each direction, a left turn lane in the westbound direction, and a skewed with support angles greater than 54°. This bridge is in need of replacement due to structural degradation. The objective of this project is to develop a replacement plan of the new Bridge No. 00037 including analysis, design, and construction plan, to increase the minimum vertical clearance, add a water main, repair corroded steel, and repair major spalling of the bridge. To do that, in depth investigation of traffic detour plans, a comparison of steel versus concrete girders, bridge construction type analysis, girder dimension calculations, and a cost analysis were conducted. Based on the investigation, the bridge general design plan were created with an Accelerated Bridge Construction (ABC) approach which includes a deck, girder, and cross frame design, as well as a loading analysis. The structural model was created in MicroStation and all loads were analyzed using SAP2000. This new replacement bridge design meets Connecticut Department of Transportation’s Bridge Design Manual and AASHTO LRFD Bridge Specification, increasing the effectiveness and life span of the bridge.