Behavior of box girder structures with strutted wing slabs through stress monitoring during construction and load testing

Abstract

The strut-supported extended wing slab box girder structure offers several advantages, including reduced self-weight and enhanced aesthetic appeal. However, research on the behavior of this structural type remains limited, particularly regarding experimental studies on real-life structures. This paper analyzes the behavior of the extended wing slab and steel struts based on strain-stress monitoring results throughout the construction process and six load tests conducted on an elevated viaduct on Hanoi’s Ring Road II. The research findings demonstrate that the box girder structure with a wing slab supported by inclined struts adequate load capacity, with behavior consistent with girder segment test results.

Keywords: Box girder bridges, strutted wing slabs, steel pipe struts, monitoring, load testing.