Shear behavior of innovative high performance joints for precast concrete deck panels: Fid-Bau Portal

Shear behavior of innovative high performance joints for precast concrete deck panels

Hu, Menghan / Jia, Zhenlei / Han, Qiang / Ni, Yulong / Jiao, Chiyu / Long, Peiheng

Highlights • An innovative high performance joint for PCDPs was proposed. • Shear behaviors of the proposed high performance joints were investigated. • The 3D FE numerical models were established to conduct parametric study. • Analytical models to predict shear capacity of the proposed joints were developed.

Abstract Precast concrete deck panels (PCDPs) are gradually applied in accelerated bridge construction (ABC) to achieve the goal of the fully prefabricated bridge. The joints between PCDPs are vulnerable under complicated stress state. The mechanical properties, feasibility of construction, and durability of joints are the focus to be investigated. This study proposed an innovative joint for PCDPs with high performance materials, including ultra-high performance concrete (UHPC) and carbon fiber-reinforced polymer (CFRP). The shear behavior of the novel joint was investigated on full-scale PCDPs via the static monotonic experiment. In addition, the 3D finite element numerical models were established to study the shear behavior, failure mechanism and influencing parameters of the proposed joints in PCDPs. Furthermore, the analytical models to predict the shear capacity of the proposed joints were developed. The results show that the proposed joints exhibit more reasonable failure mode and possess superior deformation ability compared to conventional joints. The initial stress and anchorage distance of CFRP tendons have obvious effect on the shear capacity. The proposed analytical model is able to accurately evaluate the shear capacity of the high performance joints for PCDPs. This study offers a novel joint type and provides guidance for the design of PCDPs.