Analyzing the Ultimate Capacity of a Precast Segmental Box Girder Bridge

The Second Stage Expressway System (SES) in Bangkok, Thailand includes approximately 32 km of elevated roadway. The precast segmental portion consisted of approximately 1,130 spans ranging in length from 24.9 m to 48.7 m, with a typical span length of 45 m. Because of the large investment involved, it was cost-effective to produce a prototype test span that could confirm the adequacy of the design.