Shear strength analysis of the stud in steel-UHPC composite bridge deck

Abstract

In the steel-UHPC lightweight composite bridge deck, the UHPC layer is connected to the steel plate of the orthogonal steel bridge deck through headed steel stud connectors. In order to form a strong combination, it is necessary to ensure that the studs have sufficient shear strength. By establishing the local finite element model, the interlaminar shear stress between the UHPC pavement and the steel deck in the new steel-UHPC composite bridge deck is computed, and the influence of loading factors such as various wheel loading conditions is considered. The results show that the maximum transverse interlaminar shear stress is about twice of the maximum longitudinal interlaminar shear stress. The maximum transverse shear stress under action of bi-Axle loading is about 1.33 times of that of the single axle loading. The shear strength of the headed stud meets the requirements of the Chinese standard, USA standard and the European standard.