Case Study North Shotton overbridge Integral abutment bridge structure Global analysis Soil structure interaction Northumberland County Council Technical Services Consultancy designed one of the ?rst integral bridges in the UK with the help of LUSAS Bridge analysis. The North Shotton overbridge, on the A1 Trunk Road, 5 miles south of Morpeth in Northumberland was designed on behalf of the Highways Agency using recommendations contained in a draft version of the design standard which was later issued as BA & BD 57. As built the structure has no movement joints. Thetwo span continuous bridge deck is supported on a central pier with both bank seats supported on steel H piles. The deck is of composite construction with 4 steel plate girders and a reinforced concrete deck, both forming a curved

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