Experimental Study on Shear Behavior of PBL Joint Connections for Ufc-Pc Hybrid Girder

Abstract

The experimental results and predictive equation for shear capacity of Perfobond strip (PBL) joint connection with cast-in-place UFC to develop UFC-PC hybrid girders are presented in this paper. The UFC-PC bridge consists of PC segment at both ends and UFC segment at the middle of the span. Push-out test of twelve specimens was conducted. The experimental parameters were thickness of PBL, diameter of the hole of PBL, diameter of transverse rebar, prestressing stress on connection part, and the ratio of spacing to diameter of PBL. The experimental results indicated that PBL with cast-in-place UFC connection was sufficient to transfer the shear forces between the two segments. The contributions to shear capacity in each term were clarified. In addition, the shear resisting mechanisms were investigated. By inducing prestressing stress on the connection part, the shear capacity drastically increased due to the friction resistance. Finally, the shear capacity equation for PBL with cast-in-place UFC connection was proposed. The proposed calculation method can provide a reasonable agreement with the experimental results.

Experimental evaluation of shear connectors using reactive powder concrete under natural curing condition

“…For this reason, initial cracking may develop at the steel/concrete interface when RPC is utilized. Additionally, the interfacial restrains at the steel plate/concrete interface is beneficial in enhancing the shear capacity of PBL [23][24][25][26]. However, the shrinkage of RPC may decrease the confinement effects from the steel cells and results in a drop of PBL resistance.…”

Flexural behavior of preloaded reinforced concrete beams strengthened by prestressed CFRP laminates

“…The results indicated that the shear capacity of PBL in superimposed beams was improved by increasing the strength of UHPC. Wirojjanapirom et al [26] investigated the efficiency of using UHPC to improve the shear capacity of PBL by twelve prestressed short-beam tests. Results of the study showed an increase of PBL shear capacity due to the application of pre-stressing force.…”